Document:

EX-4.5

 EXECUTION VERSION 

Exhibit 4.5 

$350,000,000 
 EIG
INVESTORS CORP. 
 10.875% SENIOR NOTES DUE 2024 

PURCHASE AGREEMENT 

February 8, 2016 
 Goldman,
Sachs & Co. 
 Credit Suisse Securities (USA) LLC 

Jefferies LLC 
 As Representatives of the several Initial
Purchasers listed in Schedule I hereto 
 c/o Goldman, Sachs & Co. 

200 West Street 
 New York, New York 10282 

Ladies and Gentlemen: 
 EIG Investors Corp., a Delaware
corporation (the “Issuer”), proposes, upon the terms and conditions set forth in this purchase agreement (this “Agreement”), to issue and sell to the initial purchasers named in Schedule I attached
hereto (the “Initial Purchasers”), $350,000,000 in aggregate principal amount of its 10.875% Senior Notes due 2024 (the “Notes”). Goldman, Sachs & Co. (“Goldman
Sachs”), Credit Suisse Securities (USA) LLC (“Credit Suisse”) and Jefferies LLC (“Jefferies”) have agreed to act as the representatives of the several Initial Purchasers (collectively, the
“Representatives”) in connection with the offering and sale of the Notes. 
 References to the “Endurance
Guarantors” refer to each entity set forth on Part A of Schedule II attached hereto. References to “Constant Contact Guarantors” refer to each entity set forth on Part B of Schedule II attached hereto. References to the
“Guarantors” refer to each of the Endurance Guarantors and Constant Contact Guarantors (each a “Guarantor” and collectively, the “Guarantors”). 

The Notes will (i) have terms and provisions that are summarized in the Pricing Disclosure Package and the Final Offering Memorandum (each
as defined below), and (ii) are to be issued pursuant to an indenture (the “Indenture”) to be entered into among the Issuer, the Endurance Guarantors and Wilmington Trust, National Association, as trustee (the
“Trustee”). The obligations of the Issuer, including the due and punctual payment of interest on the Notes, will be fully, irrevocably, and unconditionally guaranteed on a senior unsecured basis, jointly and 

  
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severally (the “Guarantees”), by (x) the Endurance Guarantors, (y) after the Acquisition (as defined below) on the Closing Date (as defined below), the
Constant Contact Guarantors and (z) any domestic subsidiary of the Issuer, acquired or organized after the Closing Date that is required to execute a supplemental indenture to provide a guarantee in accordance with the terms of the Indenture,
and their respective successors and assigns. As used herein, the term “Notes” shall include the Guarantees, unless the context otherwise requires. This Agreement is to confirm the agreement concerning the purchase of the Notes from the
Issuer by the Initial Purchasers. 
 The Notes are being offered and sold by the Issuer, a wholly-owned subsidiary of Endurance
International Group Holdings, Inc., a Delaware corporation (“Holdings”), in connection with the acquisition of all of the outstanding equity interests of Constant Contact, Inc., a Delaware corporation (the
“Company”), pursuant to the Acquisition Agreement (as defined below). On or before the Closing Date:  
  

	 	(i)	the Issuer will obtain a $40,000,000 senior secured incremental revolving facility (the “Incremental Revolving Facility”), which will be provided in the form of a Revolving Commitment Increase as
defined in, and pursuant to, that certain Third Amended and Restated Credit Agreement dated as of November 25, 2013 (as amended, restated, supplemented or otherwise modified from time to time, including on the Closing Date, the
“Senior Secured Credit Agreement”), entered into among Holdings, the Issuer, the lenders from time to time party thereto and Credit Suisse AG, Cayman Islands Branch, as administrative agent; 

 

	 	(ii)	immediately following the incurrence of the Incremental Revolving Facility, the Issuer will obtain a $165,000,000 senior secured refinancing revolving facility (the “Refinancing Revolving
Facility”), which will be provided in the form of Other Revolving Commitments as defined in, and pursuant to, the Senior Secured Credit Agreement and will be used to replace all outstanding revolving commitments and revolving loans
under the Senior Secured Credit Agreement (including the Incremental Revolving Facility); 

  

	 	(iii)	promptly following the incurrence of the Refinancing Revolving Facility, the Issuer will obtain a senior secured incremental term loan facility in an aggregate principal amount equal to $735,000,000 (the
“Incremental Term Facility”) which will be provided in the form of Incremental Term Loans as defined in, and pursuant to, the Senior Secured Credit Agreement; 

 

	 	(iv)	the Issuer will issue and sell the Notes; 

  

	 	(v)	the proceeds of the Incremental Term Facility and the Notes issued on the Closing Date and cash on hand of the Company and Holdings and their respective subsidiaries, if applicable, will be applied (a) to pay the
consideration in connection with the Acquisition and any other payments required under the Acquisition Agreement, (b) to refinance revolving loans outstanding under the Senior Secured Credit Agreement and (c) to pay the fees and expenses
incurred in connection with the Transactions (as defined below); and 

  
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	 	(vi)	Paintbrush Acquisition Corporation, a Delaware corporation and an indirect wholly owned subsidiary of the Issuer (“Merger Sub”), will merge with and into the Company, with the Company continuing
as the surviving corporation (the “Acquisition”), pursuant to the Agreement and Plan of Merger, dated as of October 30, 2015 (together with all exhibits, schedules, annexes and disclosure schedules thereto, collectively,
the “Acquisition Agreement”), entered into among Holdings, Merger Sub and the Company. 

  

	 	    	The foregoing transactions described in clauses (i) through (vi) above are collectively referred to in this Agreement as the “Transactions.” 

After the Acquisition on the Closing Date, the Issuer will cause each of the Constant Contact Guarantors to become parties to this Agreement by
executing a joinder substantially in the form attached hereto as Exhibit A (the “Purchase Agreement Joinder”), to guarantee the Notes by executing a supplement to the Indenture (the “Supplemental
Indenture”) and to join the Registration Rights Agreement (as defined below) by executing a joinder thereto (the “Registration Rights Agreement Joinder”). Notwithstanding anything to the contrary contained in
this Agreement, the representations, warranties and agreements of the Constant Contact Guarantors contained herein shall not become effective until the execution and delivery by the Constant Contact Guarantors of the Purchase Agreement Joinder and
until such time the Constant Contact Guarantors shall not have any rights or obligations under this Agreement.  
 The term
“Transaction Agreements” refers to this Agreement, the Notes, the Indenture (including the Guarantees contained therein), the Registration Rights Agreement, the Purchase Agreement Joinder, the Supplemental Indenture and the
Registration Rights Agreement Joinder. 
 Capitalized terms used but not defined herein shall have the meanings given to such terms in the
Pricing Disclosure Package and the Final Offering Memorandum. 
 For purposes of this Agreement, references to subsidiaries and affiliates of the Issuer
shall be deemed to include the Company and its direct and indirect subsidiaries and each of their respective affiliates. Any representations and warranties made prior to the execution and delivery of the Purchase Agreement Joinder with respect to
the Company and its subsidiaries, including the Constant Contact Guarantors, are made to the knowledge of the Issuer, after due inquiry. 

1. Purchase and Resale of the Notes. The Notes will be offered and sold to the Initial Purchasers without registration under the
Securities Act of 1933, as amended (the “Securities Act”), in reliance on an exemption pursuant to Section 4(a)(2) under the Securities Act. The Issuer has prepared a preliminary offering memorandum, dated
January 27, 2016 (the “Preliminary Offering Memorandum”), a pricing term sheet substantially in the form attached hereto as Schedule III (the “Pricing Term Sheet”) setting forth the terms of the
Notes omitted from the Preliminary Offering Memorandum and an offering memorandum, dated February 8, 2016 (the “Final Offering Memorandum”), setting forth information regarding the Issuer, the 

  
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Guarantors and the Notes. The Preliminary Offering Memorandum, together with the Pricing Term Sheet and any of the documents listed on Schedule IV(A) hereto, are collectively referred to as the
“Pricing Disclosure Package.” The Issuer and the Guarantors hereby confirm that they have authorized the use of the Pricing Disclosure Package and the Final Offering Memorandum in connection with the offering and
resale of the Notes by the Initial Purchasers. “Applicable Time” means 5:00 p.m. (New York City time) on the date of this Agreement. 

All references herein to the terms “Pricing Disclosure Package” and “Final Offering Memorandum”
shall be deemed to include all information filed under the Securities Exchange Act of 1934 (as amended, the “Exchange Act,” which term, as used herein, includes the rules and regulations of the Securities and Exchange
Commission (the “Commission”) promulgated thereunder) prior to the Applicable Time and incorporated by reference in the Pricing Disclosure Package or the Final Offering Memorandum (as the case may be), and all references
herein to the terms “amend,” “amendment” or “supplement” with respect to the Final Offering Memorandum shall be deemed to include all information filed under the Exchange Act
after the Applicable Time and incorporated by reference in the Final Offering Memorandum.  
 You have advised the Issuer that
you will offer and resell (the “Exempt Resales”) the Notes purchased by you hereunder on the terms set forth in each of the Pricing Disclosure Package and the Final Offering Memorandum, as amended or supplemented, solely to
(i) persons whom you reasonably believe to be “qualified institutional buyers” as defined in Rule 144A under the Securities Act (“QIBs”), and (ii) outside the United States to certain persons who are not
U.S. Persons (as defined in Regulation S under the Securities Act (“Regulation S”)) (such persons, “Non-U.S. Persons”) in offshore transactions in reliance on Regulation S. As used herein, the terms
“offshore transaction” and “United States” have the meanings assigned to them in Regulation S. Those persons specified in clauses (i) and (ii) are referred to herein as “Eligible
Purchasers.” 
 The Issuer acknowledges and agrees that the Initial Purchasers may offer and sell Notes to or through any
affiliate of an Initial Purchaser and that any such affiliate may offer and sell Notes purchased by it to or through any Initial Purchaser or any affiliate thereof. 

2. Representations, Warranties and Agreements of the Issuer and the Guarantors. As of the Applicable Time and the Closing Date, each of
the Issuer, the Endurance Guarantors, and, upon execution and delivery of the Purchase Agreement Joinder, each of the Constant Contact Guarantors, jointly and severally, represents, warrants and covenants to each Initial Purchaser as follows: 

(a) When the Notes, including the Guarantees, are issued and delivered pursuant to this Agreement, such Notes and Guarantees will not be of
the same class (within the meaning of Rule 144A under the Securities Act) as any securities of the Issuer or the Guarantors that are listed on a national securities exchange registered under Section 6 of the Exchange Act. 

(b) Assuming the accuracy of your representations and warranties in Section 3(b), the purchase and resale of the Notes pursuant hereto
(including pursuant to the Exempt Resales) are exempt from the registration requirements of the Securities Act. 

  
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 (c) No form of “general solicitation” or “general advertising” within the
meaning of Regulation D under the Securities Act (including, but not limited to, advertisements, articles, notices or other communications published in any newspaper, magazine or similar medium or broadcast over television or radio, or any seminar
or meeting whose attendees have been invited by any general solicitation or general advertising) was used by the Issuer, the Guarantors or any of their respective affiliates or any of their respective representatives or any person acting on their
behalf (other than the Initial Purchasers, as to whom the Issuer and the Guarantors make no representation) in connection with the offer and sale of the Notes and the Guarantees. 

(d) No “directed selling efforts” within the meaning of Rule 902 under the Securities Act were used by the Issuer, the Guarantors or
any of their respective affiliates or any of their respective representatives or any person acting on their behalf (other than the Initial Purchasers, as to whom the Issuer and the Guarantors make no representation) with respect to Notes sold
outside the United States to Non-U.S. Persons, and each of the Issuer, the Guarantors, any of their respective affiliates, any of their respective representatives or any person acting on its or their behalf (other than the Initial Purchasers, as to
whom the Issuer and the Guarantors make no representation) has complied with and will implement the “offering restrictions” required by Rule 902 under the Securities Act. 

(e) Each of the Preliminary Offering Memorandum, the Pricing Disclosure Package and the Final Offering Memorandum, each as of its respective
date, contains all the information specified in, and meeting the requirements of, Rule 144A(d)(4) under the Securities Act. 
 (f) None of
the Issuer, any Guarantor, any of their respective affiliates or any of their respective representatives nor any other person acting on behalf of the Issuer or any Guarantor has sold or issued any securities that would be integrated with the
offering of the Notes contemplated by this Agreement pursuant to the Securities Act, the rules and regulations thereunder or the interpretations thereof by the Commission. 

(g) The Preliminary Offering Memorandum, the Pricing Disclosure Package, the Final Offering Memorandum and any Free Writing Offering Document
(as defined below) have been prepared by the Issuer for use by the Initial Purchasers in connection with the Exempt Resales. No order or decree preventing the use of the Preliminary Offering Memorandum, the Pricing Disclosure Package, the Final
Offering Memorandum or any Free Writing Offering Document, or any order asserting that the transactions contemplated by this Agreement are subject to the registration requirements of the Securities Act has been issued, and no proceeding for that
purpose has commenced or is pending or, to the knowledge of the Issuer or any of the Guarantors, is contemplated. 
 (h) The Final Offering
Memorandum will not, as of its date or as of the Closing Date, contain an untrue statement of a material fact or omit to state a material fact necessary to make the statements therein, in the light of the circumstances under which they were made,
not misleading; provided that no representation or warranty is made as to information contained in or omitted from the Final Offering Memorandum in reliance upon and in conformity with written information furnished to the Issuer through the
Representatives by or on behalf of any Initial Purchaser specifically for inclusion therein, which information is specified in
 Section 8(e). 

  
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 (i) The Pricing Disclosure Package did not, as of the Applicable Time, contain an untrue
statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that no representation or warranty is made
as to information contained in or omitted from the Pricing Disclosure Package in reliance upon and in conformity with written information furnished to the Issuer through the Representatives by or on behalf of any Initial Purchaser specifically for
inclusion therein, which information is specified in Section 8(e). 
 (j) As of the Applicable Time and as of the Closing Date, the Recorded
Road Show (as defined below), when taken together with the Pricing Disclosure Package (as of the Applicable Time and Closing Date) and the Final Offering Memorandum (as of the Closing Date) did not include any untrue statements of a material fact or
omit to state a material fact necessary to make the statements therein, in light of the circumstances under which they were made, not misleading. 

(k) None of Holdings, the Issuer or any of the Issuer’s subsidiaries or affiliates (other than the Initial Purchasers, as to which no
representation is given) has made any offer to sell or solicitation of an offer to buy the Notes that would constitute a “free writing prospectus” (if the offering of the Notes were made pursuant to a registered offering under the
Securities Act), as defined in Rule 405 under the Securities Act (a “Free Writing Offering Document”) without the prior consent of the Representatives; any such Free Writing Offering Document the use of which has been
previously consented to by the Initial Purchasers is listed on Schedule IV(B) hereto. As of the Applicable Time and as of the Closing Date, each Free Writing Offering Document included on Schedule IV(B), when taken together with the Pricing
Disclosure Package (as of the Applicable Time and Closing Date) and the Final Offering Memorandum (as of the Closing Date) did not include any untrue statements of a material fact or omit to state a material fact necessary to make the statements
therein, in light of the circumstances under which they were made, not misleading. Holdings’ Annual Report on Form 10-K most recently filed with the Commission and all reports for periods or dates subsequent to the periods covered in such
Annual Report on Form 10-K, when they were filed with the Commission conformed in all material respects to the requirements of the Exchange Act and the rules and regulations of the Commission. 

(l) Each of Holdings, the Issuer and the Issuer’s subsidiaries has been duly organized, is validly existing and in good standing as a
corporation or other business entity under the laws of its jurisdiction of organization and is duly qualified to do business and in good standing as a foreign corporation or other business entity in each jurisdiction in which its ownership or lease
of property or the conduct of its businesses requires such qualification, except where the failure to be so qualified or in good standing could not, in the aggregate, reasonably be expected to have a material adverse effect on the condition
(financial or otherwise), results of operations or business of Holdings, the Issuer and the Issuer’s subsidiaries taken as a whole (a “Material Adverse Effect”). Each of Holdings, the Issuer and the Issuer’s
subsidiaries has all requisite corporate and other organizational power and authority necessary 

  
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to own or hold its properties and to conduct the businesses in which it is engaged except as would not reasonably be expected to have a Material Adverse Effect. The Issuer does not own or
control, directly or indirectly, any corporation, association or other entity other than the subsidiaries listed on Schedule V attached hereto. 

(m) Holdings has an authorized capitalization as set forth in each of the Pricing Disclosure Package and the Final Offering Memorandum, and
all of the issued shares of capital stock of each of Holdings and the Issuer have been duly authorized and validly issued and are fully paid and non-assessable. All of the issued shares of capital stock or other ownership interests of each
subsidiary of the Issuer have been duly authorized and validly issued, are fully paid and non-assessable and all such shares or other ownership interests owned directly or indirectly by the Issuer are free and clear of all liens, encumbrances,
equities or claims, except for such liens, encumbrances, equities or claims as could not, in the aggregate, reasonably be expected to have a Material Adverse Effect or as incurred in connection with the Refinancing Revolving Facility and the
Incremental Term Facility. 
 (n) Each of the Issuer and the Endurance Guarantors has all requisite corporate or other organizational power
and authority to execute, deliver and perform its obligations under the Indenture. The Indenture has been duly and validly authorized by the Issuer and the Endurance Guarantors and upon its execution and delivery and, assuming due authorization,
execution and delivery thereof by the Trustee, will constitute the valid and binding agreement of the Issuer and the Endurance Guarantors, enforceable against the Issuer and the Endurance Guarantors in accordance with its terms, except as such
enforceability may be limited by bankruptcy, fraudulent conveyance, insolvency, reorganization, moratorium, and other laws relating to or affecting creditors’ rights generally and by general equitable principles (regardless of whether such
enforceability is considered in a proceeding in equity or at law). No qualification of the Indenture under the Trust Indenture Act of 1939 (the “Trust Indenture Act”) is required in connection with the offer and sale of the
Notes contemplated hereby or in connection with the Exempt Resales. The Indenture will conform in all material respects to the description thereof in each of the Pricing Disclosure Package and the Final Offering Memorandum. 

(o) The Issuer has all requisite corporate power and authority to execute, deliver and perform its obligations under and issue and sell the
Notes. As of the Closing Date, the Notes will have been duly authorized by the Issuer and, when duly executed by the Issuer in accordance with the terms of the Indenture, assuming due authentication of the Notes by the Trustee, upon delivery to the
Initial Purchasers against payment therefor in accordance with the terms hereof, will be validly issued and delivered and will constitute valid and binding obligations of the Issuer entitled to the benefits of the Indenture, enforceable against the
Issuer in accordance with their terms, except as such enforceability may be limited by bankruptcy, fraudulent conveyance, insolvency, reorganization, moratorium, and other laws relating to or affecting creditors’ rights generally and by general
equitable principles (regardless of whether such enforceability is considered in a proceeding in equity or at law). The Notes will conform in all material respects to the description thereof in each of the Pricing Disclosure Package and the Final
Offering Memorandum. 

  
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 (p) Each Endurance Guarantor has all requisite corporate or other organizational power and
authority to issue and perform its obligations under the Guarantees. On or prior to the Closing Date, the Guarantees will have been duly and validly authorized by the Endurance Guarantors and when the Indenture is duly executed and delivered by the
Endurance Guarantors in accordance with its terms and upon the due execution, authentication and delivery of the Notes in accordance with the Indenture, and the issuance of the Notes in the sale to the Initial Purchasers contemplated by this
Agreement, will constitute valid and binding obligations of the Endurance Guarantors, entitled to the benefits of the Indenture and enforceable against the Endurance Guarantors in accordance with their terms, except as such enforceability may be
limited by bankruptcy, fraudulent conveyance, insolvency, reorganization, moratorium, and other laws relating to or affecting creditors’ rights generally and by general equitable principles (regardless of whether such enforceability is
considered in a proceeding in equity or at law). 
 (q) Each of the Issuer and the Endurance Guarantors has all the requisite corporate or
other organizational power and authority to execute, deliver and perform its obligations under the Registration Rights Agreement to be dated as of the Closing Date (the “Registration Rights Agreement”), which will be
substantially in the form previously delivered to you. The Registration Rights Agreement has been duly authorized by the Issuer and the Endurance Guarantors, and upon its execution and delivery will constitute the valid and binding agreement of the
Issuer and the Endurance Guarantors in accordance with its terms, except as such enforceability may be limited by bankruptcy, fraudulent conveyance, insolvency, reorganization, moratorium, and other laws relating to or affecting creditors’
rights generally and by general equitable principles (regardless of whether such enforceability is considered in a proceeding in equity or at law) and except that no representation is given with respect to Section 5 of the Registration Rights
Agreement providing for indemnification and contribution. 
 (r) The Issuer has all the requisite corporate power and authority to execute,
deliver and perform its obligations under the Exchange Notes (as defined in the Registration Rights Agreement) and each of the Endurance Guarantors has all the requisite corporate power and authority to perform its obligations under the related
guarantees, and the Exchange Notes have been duly authorized by the Issuer and the related guarantees have been duly authorized by the Endurance Guarantors and the Exchange Notes if and when issued and authenticated in accordance with the terms of
the Indenture and delivered in accordance with the exchange offer provided for in the Registration Rights Agreement (the “Exchange Offer”), will be validly issued and delivered and will constitute valid and binding
obligations of the Issuer and the related guarantees performed in accordance with the terms of the Indenture, will constitute valid and binding obligations of the Endurance Guarantors , each enforceable against the Issuer and the Endurance
Guarantors, as applicable, in accordance with their terms, except as such enforceability may be limited by bankruptcy, fraudulent conveyance, insolvency, reorganization, moratorium, and other laws relating to or affecting creditors’ rights
generally and by general equitable principles (regardless of whether such enforceability is considered in a proceeding in equity or at law), and will be entitled to the benefits of the Indenture. 

(s) Each of the Issuer and the Endurance Guarantors has all requisite corporate or other organizational power and authority to execute,
deliver and perform its obligations under the Senior Secured Credit Agreement and the other applicable Loan 

  
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Documents (as defined in, and pursuant to, the Senior Secured Credit Agreement), as the case may be. On the Closing Date, the Senior Secured Credit Agreement and the other applicable Loan
Documents (as defined in, and pursuant to, the Senior Secured Credit Agreement), as the case may be, will have been duly authorized, executed and delivered by the Issuer and each of the Endurance Guarantors and will constitute a valid and legally
binding agreement of the Issuer and each of the Endurance Guarantors, enforceable against the Issuer and each of the Endurance Guarantors in accordance with its terms except as such enforceability may be limited by bankruptcy, fraudulent conveyance,
insolvency, reorganization, moratorium, and other laws relating to or affecting creditors’ rights generally and by general equitable principles (regardless of whether such enforceability is considered in a proceeding in equity or at law). The
Senior Secured Credit Agreement and the other Loan Documents will conform in all material respects to the description thereof in each of the Pricing Disclosure Package and the Final Offering Memorandum. 

(t) After the Acquisition on the Closing Date, each of the Constant Contact Guarantors will have all requisite corporate or other
organizational power to execute, deliver and perform the obligations under the Purchase Agreement, the Purchase Agreement Joinder, the Indenture, the Supplemental Indenture, the Registration Rights Agreement, the Registration Rights Agreement
Joinder, guarantees related to the Exchange Notes and other applicable Loan Documents and each of the Purchase Agreement, the Purchase Agreement Joinder, the Indenture, the Supplemental Indenture, the Registration Rights Agreement, the Registration
Rights Agreement Joinder, guarantees related to the Exchange Notes and other applicable Loan Documents will have been duly authorized by each of the Constant Contact Guarantors on the Closing Date, and constitute a valid and legally binding
agreement of each of the Constant Contact Guarantors, enforceable against each of the Constant Contact guarantors in accordance with its terms, except as such enforceability may be limited by bankruptcy, fraudulent conveyance, insolvency,
reorganization, moratorium, and other laws relating to or affecting creditors’ rights generally and by general equitable principles (regardless of whether such enforceability is considered in a proceeding in equity or at law) and except that no
representation is given with respect to Section 5 of the Registration Rights Agreement providing for Indemnification and Contribution. 

(u) Each of the Issuer and the Endurance Guarantors has all requisite corporate or other organizational power and authority to execute,
deliver and perform its obligations under this Agreement, and this Agreement has been duly and validly authorized, executed and delivered by the Issuer and the Guarantors. 

(v) The issue and sale of the Notes and the Guarantees, the execution, delivery and performance by the Issuer and the Guarantors of the
Transaction Agreements, as applicable, and the consummation of the transactions contemplated hereby and thereby and by the Pricing Disclosure Package and Final Offering Memorandum, will not (i) conflict with or result in a breach or violation
of any of the terms or provisions of, impose any lien, charge or encumbrance upon any property or assets of the Issuer, the Guarantors or their respective subsidiaries (except for liens, charges or encumbrances upon any property or assets incurred
in connection with transactions undertaken pursuant to the Senior Secured Credit Agreement and the other Loan Documents), or constitute a default under, any indenture, mortgage, deed of trust, loan agreement, lease or other agreement or instrument
to which the Issuer or any of its 

  
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subsidiaries is a party or by which the Issuer or any of its subsidiaries is bound or to which any of the property or assets of the Issuer, the Guarantors or any of their respective subsidiaries
is subject, (ii) result in any violation of the provisions of the charter or by-laws (or similar organizational documents) of the Issuer, the Guarantors or any of their respective subsidiaries, or (iii) result in any violation of any
statute or any judgment, order, decree, rule or regulation of any court or governmental agency or body having jurisdiction over the Issuer, the Guarantors or any of their respective subsidiaries or any of their properties or assets, except, with
respect to clauses (i) and (iii), as would not reasonably be expected to have a Material Adverse Effect. 
 (w) No consent, approval,
authorization or order of, or filing, registration or qualification with any U.S. court or governmental agency or body, or to the knowledge of the Issuer or the Guarantors, any non-U.S. court or governmental agency or body, having jurisdiction over
Holdings, the Issuer, any of the subsidiaries of the Issuer or any of their respective properties or assets is required for the issue and sale of the Notes and the Guarantees, the execution, delivery and performance by the Issuer and the Guarantors
of the Transaction Agreements and the consummation of the transactions contemplated hereby and thereby, except for (i) such consents, approvals, authorizations, orders, filings, registrations or qualifications as may be required under state
securities or Blue Sky laws in connection with the purchase and distribution of the Notes by the Initial Purchasers and (ii) as shall have been obtained or made on or prior to the Closing Date. 

(x) The historical financial statements (including the related notes and supporting schedules) and the other financial data included or
incorporated by reference in the Pricing Disclosure Package and the Final Offering Memorandum present fairly in all material respects the financial condition, results of operations and cash flows of the entities purported to be shown thereby, at the
dates and for the periods indicated, and have been prepared in conformity with accounting principles generally accepted in the United States) applied on a consistent basis throughout the periods involved, except as otherwise stated therein; the
other financial information included in each of the Pricing Disclosure Package and the Final Offering Memorandum has been derived from the accounting records of Holdings and its consolidated subsidiaries and presents fairly the information shown
thereby in all material respects; and the pro forma financial information and the related notes thereto included in each of the Pricing Disclosure Package and the Final Offering Memorandum has been prepared in accordance with the Commission’s
rules and guidance with respect to pro forma financial information, and the assumptions underlying such pro forma financial information are reasonable and are fairly summarized in each of the Pricing Disclosure Package and the Final Offering
Memorandum in all material respects. 
 (y) BDO USA, LLP, who have certified certain financial statements of Holdings, whose reports are
included or incorporated by reference in the Pricing Disclosure Package and the Final Offering Memorandum and who have delivered the initial letter referred to in Section 8(f) hereof, are independent registered public accountants within the
meaning of the Securities Act and the applicable rules and regulations adopted by the Commission and the Public Company Accounting Oversight Board (the “PCAOB”). 

(z) PricewaterhouseCoopers LLP, who have certified certain financial statements of the Company, whose reports are included in the Pricing
Disclosure Package and 

  
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the Final Offering Memorandum and who have delivered the initial letter referred to in Section 8(f) hereof, are independent registered public accountants within the meaning of the Securities
Act and the applicable rules and regulations adopted by the Commission and the PCAOB. 
 (aa) Each of Holdings and the Company and their
respective officers and directors are in compliance with the applicable provisions of the Sarbanes-Oxley Act of 2002 (the “Sarbanes-Oxley Act,” which term, as used herein, includes the rules and regulations of the Commission
promulgated thereunder). 
 (bb) Each of Holdings and the Company maintains a system of internal control over financial reporting that is in
compliance with the Sarbanes-Oxley Act and is sufficient to provide reasonable assurances that (i) transactions are executed in accordance with management’s general or specific authorization, (ii) transactions are recorded as
necessary to permit preparation of the financial statements of Holdings and the Company in conformity with accounting principles generally accepted in the United States and to maintain accountability for its assets, (iii) access to assets is
permitted only in accordance with management’s general or specific authorization, and (iv) the recorded accountability for assets of Holdings and the Company is compared with existing assets at reasonable intervals and appropriate action
is taken with respect to any differences. The interactive data in eXtensible Business Reporting Language incorporated by reference in the Pricing Disclosure Package and the Final Offering Memorandum fairly present the information called for in all
material respects and in accordance with the rules of the Commission and guidelines applicable thereto. 
 (cc) (i) Each of Holdings
and the Company maintains disclosure controls and procedures (as such term is defined in Rule 13a-15(e) under the Exchange Act), (ii) such disclosure controls and procedures are designed to ensure that the information required to be disclosed
by Holdings in the reports it files or submits under the Exchange Act is accumulated and communicated to management of Holdings, including its principal executive officer and principal financial officer, as appropriate, to allow timely decisions
regarding required disclosure to be made; and (iii) such disclosure controls and procedures are effective in all material respects to perform the functions for which they were established. 

(dd) Since the date of the latest audited financial statements incorporated by reference in the Pricing Disclosure Package and the Final
Offering Memorandum, there has not been any material adverse change, or any development that could reasonably be expected to result in a material adverse change, in the condition (financial or otherwise), results of operations or business of
Holdings, the Issuer and the Issuer’s subsidiaries, taken as a whole. 
 (ee) The Issuer, the Guarantors and each of the Issuer’s
subsidiaries own or lease all such real and personal property necessary to the conduct of their respective businesses, except as would not reasonably be expected to have a Material Adverse Effect. 

(ff) Each of Holdings, the Issuer and the Issuer’s subsidiaries have such permits, licenses, approvals, consents, franchises,
certificates of need and other approvals or authorizations of governmental or regulatory authorities (“Permits”) as are necessary under applicable law to own their properties and conduct their businesses in the manner
described in the Pricing Disclosure Package and the Final Offering Memorandum, except for any of the 

  
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foregoing that could not, in the aggregate, reasonably be expected to have a Material Adverse Effect or except as described in the Pricing Disclosure Package and the Final Offering Memorandum.
None of Holdings, the Issuer or any of the Issuer’s subsidiaries has received notice of any proceedings related to the revocation or modification of any such Permits that, individually or in the aggregate, if the subject of an unfavorable
decision, ruling or finding, would reasonably be expected to have a Material Adverse Effect. 
 (gg) Except as set forth in the Pricing
Disclosure Package and Final Offering Memorandum and as could not reasonably be expected, individually or in the aggregate, to have a Material Adverse Effect, Holdings, the Issuer and each of the Issuer’s subsidiaries (i) own or otherwise
possess adequate rights to use all material patents, trademarks, service marks, trade names, domain names, copyrights and registrations and applications thereof, and software (including trade secrets) necessary for the conduct of their respective
businesses as conducted as of the Applicable Time, (ii) have no reason to believe that the conduct of their respective businesses as conducted as of the Applicable Time will infringe, violate or conflict with any such right of others and
(iii) have not received any material written notice of any claim of infringement, violation or conflict with, any such rights of others. 

(hh) Except as set forth in the Pricing Disclosure Package and the Final Offering Memorandum, there are no legal or governmental proceedings
pending to which Holdings, the Issuer or any of the Issuer’s subsidiaries is a party or of which any property or assets of Holdings, the Issuer or any of the Issuer’s subsidiaries is the subject that could, in the aggregate, reasonably be
expected to have a Material Adverse Effect or could, in the aggregate, reasonably be expected to have a material adverse effect on the performance by the Issuer and the Guarantors of the performance of this Agreement, the Indenture, the Notes, the
Guarantees, the Registration Rights Agreement, the Exchange Securities (including the related guarantees) or the consummation of any of the transactions contemplated hereby. To the Issuer’s and each Guarantor’s knowledge, no such
proceedings are threatened or contemplated by governmental authorities or others. 
 (ii) Holdings, the Issuer and the Issuer’s
subsidiaries, taken as a whole, are insured against such losses and risks and in such amounts as are reasonable and customary in the businesses in which they are engaged or as required by law. 

(jj) Except as would not have a Material Adverse Effect, no labor disturbance by or dispute with the employees of the Issuer or any of its
subsidiaries exists or, to the knowledge of the Issuer or any Guarantor, is imminent. 
 (kk) (i) Holdings, the Issuer and the
Issuer’s subsidiaries (x) are, and, to the knowledge of the Issuer and the Guarantors, at all prior times were, in compliance with any and all applicable U.S. federal, state, local and non-U.S. laws, rules, regulations, requirements,
decisions and orders relating to the protection of human health or safety, the environment, natural resources, or the use, transport, manufacture, treatment, storage, disposal or release of hazardous, toxic or radioactive materials, substances or
wastes, pollutants or contaminants (collectively, “Environmental Laws”), (y) have received and are in compliance with all permits, licenses, certificates or other authorizations or approvals, and have obtained all
financial assurances, required of them under applicable Environmental Laws to conduct their 

  
 12 

 
respective businesses, and (z) have not received notice of any actual or potential liability under or relating to any Environmental Laws, including for the investigation or remediation of
any disposal or release of hazardous, toxic or radioactive materials, substances or wastes, pollutants or contaminants, and have no knowledge that any such notice is threatened, and (ii) to the knowledge of the Issuer and the Guarantors, there
are no costs or liabilities associated with Environmental Laws of or relating to Holdings, the Issuer or the Issuer’s subsidiaries or the conduct their respective businesses, except in the case of each of (i) and (ii) above, for any
such failure to comply, or failure to receive, or cost or liability, as would not, individually or in the aggregate, have a Material Adverse Effect; and (iii) except as described in each of the Pricing Disclosure Package and the Final Offering
Memorandum, (x) there are no proceedings that are pending, or that are known to be contemplated, against Holdings, the Issuer or the Issuer’s subsidiaries under any Environmental Laws in which a governmental entity is also a party, other
than such proceedings regarding which it is reasonably believed no monetary sanctions of $100,000 or more will be imposed, and (y) none of Holdings, the Issuer or the Issuer’s subsidiaries is aware of any issues regarding compliance with
Environmental Laws, or liabilities or other obligations under Environmental Laws or concerning hazardous, toxic or radioactive materials, substances or wastes, pollutants or contaminants, in each case of clause (x) and (y) that could
reasonably be expected to have a Material Adverse Effect. 
 (ll) Except, in each case, as would not have a Material Adverse Effect, the
Issuer, the Guarantors and the Issuer’s subsidiaries have filed all federal, state, local and foreign tax returns required to be filed through the date hereof, subject to permitted extensions, and have paid all taxes due, except for items being
contested in good faith for which adequate reserves for taxes have been established in accordance with generally accepted accounting principles, and no tax deficiency has been determined adversely to Holdings, the Issuer or the Issuer’s
subsidiaries, nor does the Issuer or any Guarantor have any knowledge of any tax deficiencies that have been, or could reasonably be expected to be asserted against Holdings, the Issuer or the Issuer’s subsidiaries. 

(mm) Except, in each case, as would not have a Material Adverse Effect, (i) each “employee benefit plan” (within the meaning of
Section 3(3) of the Employee Retirement Security Act of 1974, as amended (“ERISA”)) for which the Issuer or any member of its “Controlled Group” (defined as any organization which is a member of a controlled
group of corporations within the meaning of Section 414 of the Internal Revenue Code of 1986, as amended (the “Code”)) would have any liability (each a “Plan”) has been maintained in compliance
with its terms and with the requirements of all applicable statutes, rules and regulations including ERISA and the Code; (ii) no prohibited transaction, within the meaning of Section 406 of ERISA or Section 4975 of the Code, has
occurred with respect to any Plan excluding transactions effected pursuant to a statutory or administrative exemption; (iii) with respect to each Plan subject to Title IV of ERISA (A) no “reportable event” (within the meaning of
Section 4043(c) of ERISA) has occurred or is reasonably expected to occur, (B) no “accumulated funding deficiency” (within the meaning of Section 302 of ERISA or Section 412 of the Code), whether or not waived, has
occurred or is reasonably expected to occur, (C) the fair market value of the assets under each Plan exceeds the present value of all benefits accrued under such Plan (determined based on those assumptions used to fund such Plan), and
(D) neither the Issuer nor any member of its Controlled Group has incurred, or reasonably expects to incur, any liability under Title IV of ERISA (other than contributions to the Plan or premiums

  
 13 

 
to the Pension Benefit Guaranty Corporation in the ordinary course and without default) in respect of a Plan (including a “multiemployer plan”, within the meaning of
Section 4001(c)(3) of ERISA); and (iv) each Plan that is intended to be qualified under Section 401(a) of the Code is so qualified and nothing has occurred, whether by action or by failure to act, which would cause the loss of such
qualification. 
 (nn) Except as may be limited by applicable state corporation law or comparable laws or the Senior Secured Credit
Agreement, no subsidiary of the Issuer is currently prohibited, directly or indirectly, from paying any dividends to the Issuer, from making any other distribution on such subsidiary’s capital stock, from repaying to the Issuer any loans or
advances to such subsidiary from the Issuer or from transferring any of such subsidiary’s property or assets to the Issuer or any other subsidiary of the Issuer, except as described in the Pricing Disclosure Package and the Final Offering
Memorandum. 
 (oo) Neither the Issuer nor any of the Guarantors is, and after giving effect to the offer and sale of the Notes and the
application of the proceeds therefrom as described under “Use of Proceeds” in each of the Pricing Disclosure Package and the Final Offering Memorandum will be, required to be registered as an “investment company” under the
Investment Company Act of 1940, as amended. 
 (pp) Immediately after the consummation of the Transactions and the other transactions
contemplated by this Agreement, (i) the fair value and present fair saleable value of the assets of Holdings, the Issuer and the Issuer’s subsidiaries taken as a whole on a consolidated basis will exceed the sum of their stated liabilities
and identified contingent liabilities taken as a whole; and (ii) Holdings, the Issuer and the Issuer’s subsidiaries on a going-concern basis will not be (a) left with unreasonably small capital with which to carry on their business as
it is proposed to be conducted, (b) unable to pay their debts (contingent or otherwise) as they will mature or (c) otherwise insolvent. 

(qq) None of Holdings, the Issuer or the Issuer’s subsidiaries is a party to any contract, agreement or understanding with any person
(other than this Agreement) that could give rise to a valid claim against any of them or the Initial Purchasers for a brokerage commission, finder’s fee or like payment in connection with the offering and sale of the Notes. 

(rr) None of the transactions contemplated by this Agreement (including, without limitation, the use of the proceeds from the sale of the
Notes), will violate or result in a violation of Section 7 of the Exchange Act, or any regulation promulgated thereunder, including, without limitation, Regulations T, U and X of the Board of Governors of the Federal Reserve System. 

(ss) Neither the Issuer nor its affiliates has taken or will take, directly or indirectly, any action designed to or that has constituted or
that could reasonably be expected to cause or result in the stabilization or manipulation of the price of any security of the Issuer or the Guarantors in connection with the offering of the Notes. 

(tt) None of the Issuer, any of the Guarantors or any of their respective subsidiaries or, to the knowledge of the Issuer or the Guarantors,
any director, officer, agent, 

  
 14 

 
employee or any other person duly authorized to act and acting on behalf of the Issuer or any of the Guarantors or any of their respective subsidiaries has, in connection with the Issuer or the
Guarantors or any of their respective subsidiaries, (i) used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expense relating to political activity; (ii) made any direct or indirect material,
unlawful payment to any foreign or domestic government official or employee from corporate funds, (iii) made any material bribe or kickback or other unlawful payment, or (iv) taken any action, directly or indirectly, that would constitute
or result in (A) a violation by such person of the Foreign Corrupt Practices Act of 1977, as amended, and the rules and regulations thereunder (“FCPA”) or the U.K. Bribery Act 2010 or (B) a material violation by
such person of any other applicable anti-corruption or anti-bribery statute or regulation (collectively, the “Anti-Corruption Laws”), including, without limitation, making use of the mails or any means or instrumentality of
interstate commerce corruptly in furtherance of an offer, payment, promise to pay or authorization of the payment of any money, or other property, gift, promise to give or authorization of the giving of anything of value to any “foreign
official” (as such term is defined in the FCPA) or any foreign political party or official thereof or any candidate for foreign political office. Holdings, the Issuer and the Issuer’s subsidiaries have instituted, and maintain and enforce,
policies and procedures designed to promote and achieve continued compliance with the Anti-Corruption Laws. 
 (uu) The operations of the
Issuer and the Guarantors and their respective subsidiaries are and have been conducted at all times in material compliance with applicable financial recordkeeping and reporting requirements of the Currency and Foreign Transactions Reporting Act of
1970, as amended, the money laundering statutes of all jurisdictions, the rules and regulations thereunder and any related or similar rules, regulations or guidelines, issued, administered or enforced by any governmental agency (collectively, the
“Money Laundering Laws”) and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Issuer or any of the Guarantors or any of their respective
subsidiaries with respect to the Money Laundering Laws is pending or, to the knowledge of the Issuer or the Guarantors, threatened. 
 (vv)
None of the Issuer or any of the Guarantors or any of their respective subsidiaries or, to the knowledge of the Issuer or the Guarantors, any director, officer, agent, employee or affiliate (other than the Initial Purchasers, as to whom the Issuer
and the Guarantors make no representation) or any other person acting on behalf of the Issuer or any of the Guarantors or any of their respective subsidiaries is (i) currently a person with whom dealings are prohibited under any sanctions
administered or enforced by the United States, including, without limitation, the Office of Foreign Assets Control of the U.S. Department of the Treasury (“OFAC”) and the U.S. Department of State, the United Nations Security
Council, the European Union, the United Kingdom, including Her Majesty’s Treasury, Canada, Mexico, Belgium or Italy (collectively, “Sanctions” and any such person, a “Sanctioned Person”) or
(ii) located, organized or resident in a country or territory that is the subject or target of Sanctions that broadly prohibit dealings with such country or territory (currently, Cuba, Iran, North Korea, Sudan, Syria and Crimea) (each, a
“Sanctioned Jurisdiction”). The Issuer will not, directly or indirectly, use the proceeds of the offering, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other person
or entity, (i) for the purpose of financing any dealings with or the activities of any person that is, at the time of such financing, a Sanctioned Person or is located, organized or resident in a Sanctioned Jurisdiction, or (ii) in

  
 15 

 
any other manner, in each case, as would constitute or give rise to a violation by any person (including any person participating in the offering, whether as underwriter, advisor, investor or
otherwise) of Sanctions. The Issuer, the Guarantors and their respective subsidiaries have instituted, and maintain and enforce, policies and procedures designed to promote and achieve continued compliance with Sanctions. 

Any certificate signed by any officer of the Issuer or the Guarantors and delivered to the Representatives or counsel for the Initial Purchasers in connection
with the offering of the Notes shall be deemed a representation and warranty by the Issuer or such Guarantor, jointly and severally, as to matters covered thereby, to each Initial Purchaser. 

3. Purchase of the Notes by the Initial Purchasers, Agreements to Sell, Purchase and Resell. 

(a) The Issuer agrees, on the basis of the representations, warranties, covenants and agreements of the Initial Purchasers contained herein
and subject to all the terms and conditions set forth herein, to issue and sell to the Initial Purchasers and, upon the basis of the representations, warranties and agreements of the Issuer, the Endurance Guarantors and, upon execution and delivery
of the Purchase Agreement Joinder, of each of the Constant Contact Guarantors, herein contained and subject to all the terms and conditions set forth herein, each Initial Purchaser agrees, severally and not jointly, to purchase from the Issuer, at a
purchase price of 93.7525% of the principal amount thereof, the principal amount of Notes set forth opposite the name of such Initial Purchaser in Schedule I attached hereto. The Issuer shall not be obligated to deliver any of the securities to be
delivered hereunder except upon payment for all of the securities to be purchased as provided herein. 
 (b) Each of the Initial Purchasers,
severally and not jointly hereby represents and warrants to the Issuer that it will offer the Notes for resale upon the terms and conditions set forth in this Agreement and in the Pricing Disclosure Package. Each of the Initial Purchasers, severally
and not jointly, hereby represents and warrants to, and agrees with, the Issuer, on the basis of the representations, warranties and agreements of the Issuer and the Guarantors, that such Initial Purchaser: (i) is a QIB with such knowledge and
experience in financial and business matters as are necessary in order to evaluate the merits and risks of an investment in the Notes; (ii) in connection with the Exempt Resales, will solicit offers to buy the Notes only from, and will offer to
sell the Notes only to, the Eligible Purchasers in accordance with this Agreement and on the terms contemplated by the Pricing Disclosure Package; and (iii) will not offer or sell the Notes, nor has it offered or sold the Notes by, or otherwise
engaged in, any form of general solicitation or general advertising (within the meaning of Regulation D, including, but not limited to, advertisements, articles, notices or other communications published in any newspaper, magazine, or similar medium
or broadcast over television or radio, or any seminar or meeting whose attendees have been invited by any general solicitation or general advertising) and will not engage in any directed selling efforts within the meaning of Rule 902 under the
Securities Act, in connection with the offering of the Notes. 
 (c) The Initial Purchasers have not nor, prior to the later to occur of
(A) the Closing Date and (B) completion of the distribution of the Notes, will not, use, authorize use of, refer to or distribute any material in connection with the offering and sale of the Notes other than

  
 16 

 
(i) the Preliminary Offering Memorandum, the Pricing Disclosure Package or the Final Offering Memorandum, (ii) any written communication prepared by such Initial Purchaser and approved by
the Issuer in writing, or (iii) any written communication relating to or that contains the preliminary or final terms of the Notes and Guarantees or their offering and/or other information that was included (including through incorporation by
reference) in the Pricing Disclosure Package or the Final Offering Memorandum. 
 (d) Each of the Initial Purchasers hereby acknowledges
that upon original issuance thereof, and until such time as the same is no longer required under the applicable requirements of the Securities Act, the Notes (and all securities issued in exchange therefore or in substitution thereof) shall bear
legends substantially in the forms as set forth in the “Notice to Investors” section of the Pricing Disclosure Package and Final Offering Memorandum (along with such other legends as the Issuer and its counsel deem necessary). 

Each of the Initial Purchasers understands that the Issuer and, for purposes of the opinions to be delivered to the Initial Purchasers pursuant to Sections
8(b) and 8(d) hereof, counsel to the Issuer and counsel to the Initial Purchasers, will rely upon the accuracy and truth of the foregoing representations, warranties and agreements, and the Initial Purchasers hereby consent to such reliance. 

4. Delivery of the Notes and Payment Therefor. Delivery to the Initial Purchasers of and payment for the Notes shall be made at the
office of Milbank, Tweed, Hadley & McCloy LLP, 28 Liberty Street, New York, New York 10005 at 10:30 a.m., New York City time, on February 9, 2016 (the “Closing Date”). The place of closing for the Notes and the
Closing Date may be varied by agreement between the Initial Purchasers and the Issuer. 
 The Notes will be delivered to the Initial
Purchasers, or the Trustee, as custodian for The Depository Trust Company (“DTC”), against payment by or on behalf of the Initial Purchasers of the purchase price therefor by wire transfer in immediately available funds, by
causing DTC to credit the Notes to the account of the Initial Purchasers at DTC. The Notes will be evidenced by one or more global securities in definitive form (the “Global Notes”) and will be registered, in the case of the
Global Notes, in the name of Cede & Co. as nominee of DTC, and in the other cases, in such names and in such denominations as the Initial Purchasers shall request prior to 10:30 a.m., New York City time, on the second business day preceding
the Closing Date. The Notes to be delivered to the Initial Purchasers, or the Trustee, as custodian for DTC shall be made available to the Initial Purchasers in New York City for inspection and packaging not later than 10:30 a.m., New York City
time, on the business day next preceding the Closing Date. 
 5. Agreements of the Issuer and the Guarantors. The
Issuer, the Endurance Guarantors, and upon execution and delivery of the Purchase Agreement Joinder, each of the Constant Contact Guarantors, jointly and severally, agree with each of the Initial Purchasers as follows: 

(a) The Issuer will promptly furnish to the Initial Purchasers, without charge, such number of copies of the Final Offering Memorandum as may
then be amended or supplemented as they may reasonably request. 

  
 17 

 (b) The Issuer and the Endurance Guarantors will prepare the Final Offering Memorandum in a form
approved by the Representatives and will not make any amendment or supplement to the Pricing Disclosure Package or to the Final Offering Memorandum of which the Representatives shall not previously have been advised or to which the Representatives
shall reasonably object after being so advised. 
 (c) Each of the Issuer and the Guarantors consents to the use of the Pricing Disclosure
Package and the Final Offering Memorandum in accordance with the securities or Blue Sky laws of the jurisdictions in which the Notes are offered by the Initial Purchasers and by all dealers to whom Notes may be sold, in connection with the offering
and sale of the Notes. 
 (d) If, at any time prior to completion of the distribution of the Notes by the Initial Purchasers to Eligible
Purchasers, any event occurs or information becomes known that, in the judgment of the Issuer or any of the Guarantors or in the opinion of counsel for the Initial Purchasers, should be set forth in the Pricing Disclosure Package or the Final
Offering Memorandum so that the Pricing Disclosure Package or the Final Offering Memorandum, as then amended or supplemented, does not include any untrue statement of material fact, or omit to state a material fact, necessary in order to make the
statements therein, in the light of the circumstances under which they were made, not misleading, or if it is necessary to supplement or amend the Pricing Disclosure Package or the Final Offering Memorandum in order to comply with any law, the
Issuer and the Guarantors will forthwith prepare an appropriate supplement or amendment thereto, and will expeditiously furnish to the Initial Purchasers a reasonable number of copies thereof. 

(e) None of Holdings, the Issuer or any of the Issuer’s subsidiaries will make any offer to sell or solicitation of an offer to buy the
Notes that would constitute a Free Writing Offering Document without the prior consent of the Representatives, which consent shall not be unreasonably withheld or delayed. 

(f) Promptly from time to time to take such action as the Initial Purchasers may reasonably request to qualify the Notes for offering and sale
under the securities or Blue Sky laws of such jurisdictions as the Initial Purchasers may request and to comply with such laws so as to permit the continuance of sales and dealings therein in such jurisdictions for as long as may be necessary to
complete the distribution of the Notes; provided that in connection therewith neither the Issuer nor any Guarantor shall be required to (i) qualify as a foreign corporation in any jurisdiction in which it would not otherwise be required
to so qualify, (ii) file a general consent to service of process in any such jurisdiction, or (iii) subject itself to taxation in any jurisdiction in which it would not otherwise be subject. 

(g) For a period commencing on the date hereof and ending on the 60th day after the date of the Final Offering Memorandum, each of the Issuer
and the Guarantors agrees not to, directly or indirectly, (i) offer for sale, sell, or otherwise dispose of (or enter into any transaction or device that is designed, or would be expected, to result in the disposition by any person at any time
in the future of) any capital markets debt securities of the Issuer substantially similar to the Notes (other than the issuance of Exchange Securities pursuant to, or the filing of a registration statement pursuant to, the Registration Rights
Agreement) or securities convertible into or exchangeable for such debt securities of the Issuer, or sell or grant options, rights or 

  
 18 

 
warrants with respect to such debt securities of the Issuer or securities convertible into or exchangeable for such debt securities of the Issuer, (ii) enter into any swap or other
derivatives transaction that transfers to another, in whole or in part, any of the economic benefits or risks of ownership of such debt securities of the Issuer, whether any such transaction described in clause (i) or (ii) above is to be
settled by delivery of debt securities of the Issuer or other securities, in cash or otherwise, or (iii) publicly announce an offering of any debt securities of the Issuer substantially similar to the Notes (other than the issuance of Exchange
Securities pursuant to, or the filing of a registration statement pursuant to, the Registration Rights Agreement) or securities convertible or exchangeable into such debt securities, in each case without the prior written consent of the
Representatives on behalf of the Initial Purchasers. 
 (h) At any time when Holdings is not subject to Section 13 or 15(d) of the
Exchange Act, for the benefit of holders from time to time of Notes, it will furnish at its expense, on behalf of the Issuer, upon request, to holders of Notes and prospective purchasers of Notes, information satisfying the requirements of Rule
144A(d)(4) under the Securities Act. 
 (i) The Issuer will apply the net proceeds from the sale of the Notes to be sold by it hereunder
substantially in accordance with the description set forth in the Pricing Disclosure Package and the Final Offering Memorandum under the caption “Use of Proceeds.” 

(j) The Issuer will use its best efforts to permit the Notes to be eligible for clearance and settlement through DTC. 

(k) During the period from the Closing Date until one year after the Closing Date, the Issuer will not, and will not permit any of its
subsidiaries to, resell any Notes that have been acquired by any of them except for Notes resold in a transaction that complies with applicable securities laws. 

(l) The Issuer and the Guarantors will not and will cause their affiliates (other than the Initial Purchasers, as to which no agreement is made) not to sell,
offer for sale or solicit offers to buy or otherwise negotiate in respect of any security (as defined in the Securities Act) that would be integrated with the sale of the Notes in a manner that would require the registration under the Securities Act
of the sale to the Initial Purchasers or the Eligible Purchasers of the Notes. The Issuer and the Guarantors will take reasonable precautions designed to ensure that any offer or sale, direct or indirect, in the United States or to any U.S. person
(as defined in Rule 902 under the Securities Act), of any Notes or any substantially similar security issued by the Issuer or any Guarantor, within six months subsequent to the date on which the distribution of the Notes has been completed (as
notified to the Issuer by the Initial Purchasers), is made under restrictions and other circumstances reasonably designed not to affect the status of the offer and sale of the Notes in the United States and to U.S. persons contemplated by this
Agreement as transactions exempt from the registration provisions of the Securities Act, including any sales pursuant to Rule 144A under, or Regulations D or S of, the Securities Act. 

(m) None of the Issuer or the Guarantors, or any of their affiliates or any other person acting on their behalf (other than the Initial
Purchasers, as to which no covenant is given) will (i) solicit offers for, or offer or sell, the Notes by means of any form of general solicitation or general advertising within the meaning of Rule 502(c) of Regulation D or in any manner

  
 19 

 
involving a public offering within the meaning of Section 4(a)(2) of the Securities Act or (ii) engage in any directed selling efforts within the meaning of Regulation S, and all such
persons will comply with the offering restrictions requirement of Regulation S. 
 (n) The Issuer and Holdings will cause each of the
Constant Contact Guarantors to execute and deliver to the Initial Purchasers the Purchase Agreement Joinder after the Acquisition on the Closing Date. 

(o) The Issuer and Holdings will cause each of the Constant Contact Guarantors to execute and deliver to the Initial Purchasers the
Registration Rights Agreement Joinder after the Acquisition on the Closing Date. 
 (p) The Issuer and Holdings will cause the written
opinion of Cleary Gottlieb Steen & Hamilton LLP, as counsel to the Issuer and the Guarantors, addressed to the Initial Purchasers and dated the Closing Date, substantially in the form of Exhibit D hereto, to be furnished to the Initial
Purchasers. 
 6. Agreement to Cooperate. The Issuer and Holdings hereby covenant and agree with the Initial Purchasers as follows:

  
 20 

 (a) After the Closing Date and until such time as the Initial Purchasers have
completed the distribution of the Notes to Eligible Purchasers or any affiliate of the Initial Purchasers that holds Notes no longer holds any Notes (the “Cooperation Period”), at any time and from time to time (but not more
than three (3) times), upon a written request (a “Demand Notice”) from the Initial Purchasers to the Issuer to assist the Initial Purchasers in connection with an offer and resale of the Notes, the Issuer and Holdings shall use
their commercially reasonable efforts to furnish, within 15 Business Days following receipt of a Demand Notice, to the Initial Purchasers or any of their affiliates that hold any Notes, as may be set forth in the Demand Notice, printed or electronic
copies of an offering memorandum (the “Demand Offering Memorandum”), substantially similar to the Final Offering Memorandum, with such necessary amendments or supplements thereto (which amendments and supplements may not be made
solely through incorporation by reference without the consent of the Initial Purchasers, such consent not to be unreasonably withheld) and suitable for the contemplated offering, so that the Demand Offering Memorandum, including the documents
incorporated by reference therein, would not contain an untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not
misleading. 
 (b) In connection with any such Demand Notice, the Initial Purchasers shall specify a sale date (a
“Sale Date”), which shall not be earlier than 15 Business Days following the Issuer’s receipt of the related Demand Notice, and the Issuer and Holdings and the Initial Purchasers shall mutually determine the related settlement
date (a “Settlement Date”). 
 (c) Upon request by the Initial Purchasers, the Issuer and Holdings shall
use their commercially reasonable efforts, on or prior to the Sale Date or the Settlement Date, as applicable, to: 
  

	 	(i)	deliver or cause to be delivered to the Initial Purchasers opinions and negative assurance letters dated as of such Settlement Date and addressed to the Initial Purchasers, in customary form and substantially consistent
with those provided pursuant to Sections 8(b) and 8(c) of this Agreement; 

  

	 	(ii)	deliver or cause to be delivered to the Initial Purchasers accountants’ “comfort” letters dated such Sale Date and “bring-down” comfort letters dated such Settlement Date and addressed to the
Initial Purchasers with respect to the Demand Offering Memorandum and the documents incorporated by reference therein from BDO USA, LLP and PricewaterhouseCoopers LLP, in customary form and substantially consistent with those provided pursuant to
Sections 8(e) and 8(f) of this Agreement; 

  
 21 

	 	(iii)	deliver or cause to be delivered to the Initial Purchasers a certificate of the Chief Executive Officer and Chief Financial Officer of the Issuer and Holdings, or other officers satisfactory to the Initial Purchasers,
dated such Settlement Date and addressed to the Initial Purchasers, substantially consistent with that provided pursuant to Section 8(h) of this Agreement; 

  

	 	(iv)	use their commercially reasonable efforts to assist the Initial Purchasers in their marketing efforts for the resale of the Notes in connection with a Demand Notice by (A) providing to the Initial Purchasers and
their counsel all information they reasonably request to update due diligence (including by way of conference calls) to each Sale Date and each Settlement Date, (B) causing senior management of Holdings to be available to participate in a
reasonable number of conference calls to be scheduled by the Initial Purchasers with prospective investors and in a customary “road show” for debt securities on no more than three occasions that shall not, in each case, exceed five
Business Days (unless otherwise agreed by the Issuer and Holdings) and (C) cooperate with the Initial Purchasers in the preparation of an updated investor presentation; 

 

	 	(v)	furnish to the Initial Purchasers and to counsel for the Initial Purchasers, without charge, as many copies of each Final Offering Memorandum and any amendments and supplements thereto as they may reasonably request;

  

	 	(vi)	inform the Initial Purchasers promptly if at any time the Issuer or Holdings becomes aware that the Demand Offering Memorandum contains an untrue statement of a material fact or omits to state a material fact necessary
in order to make the statements therein, in the light of the circumstances under which they were made, not misleading, and as promptly as reasonably practicable, prepare and furnish to the Initial Purchasers an amendment or supplement to the Demand
Offering Memorandum that corrects such misstatement or omission; 

  

	 	(vii)	not make any amendment or supplement to the Demand Offering Memorandum (other than as a result of the filing of reports required to be filed under the Exchange Act) or otherwise distribute any Free Writing Offering
Document without the prior consent of the Initial Purchasers, which consent shall not be unreasonably withheld, after reasonable notice thereof; and 

  

	 	(viii)	maintain a rating for the Notes from S&P and Moody’s 

  
 22 

 (d) The Issuer and Holdings shall pay or cause to be paid all expenses, costs,
fees and taxes incident to and in connection with the Issuer’s and Holdings’ performance of its obligations under this Section 6 on the same basis, mutatis mutandis, as set forth in Section 7 hereof. 

(e) The Issuer and Holdings may, for a period (a “Blackout Period”) of up to 60 days in any
three-month period, not to exceed 90 days in any twelve-month period, suspend its obligations under this Section 6 if the Board of Directors of Holdings reasonably determines that a Demand Offering Memorandum is not or will not be usable under
circumstances relating to corporate developments, public filings with the SEC and similar events (including the period prior to the filing of any Form 10-K or Form 10-Q in which the financial statements are considered “stale” for purposes
of obtaining accountant “comfort” letters). 
 7. Expenses. Whether or not the transactions contemplated by this Agreement
are consummated or this Agreement is terminated, the Issuer and the Guarantors jointly and severally agree to pay all expenses, costs, fees and taxes incident to and in connection with: (a) the preparation, printing, filing and distribution of
the Pricing Disclosure Package and the Final Offering Memorandum (including, without limitation, financial statements and exhibits) and all amendments and supplements thereto (including the fees, disbursements and expenses of the Issuer’s and
the Guarantors’ accountants and counsel, but not, however, legal fees and expenses of the Initial Purchasers’ counsel incurred in connection therewith); (b) the preparation, printing (including, without limitation, word processing and
duplication costs) and delivery of this Agreement, the Indenture, the Registration Rights Agreement, all Blue Sky memoranda and all other agreements, memoranda, correspondence and other documents printed and delivered in connection therewith and
with the Exempt Resales (but not, however, legal fees and expenses of the Initial Purchasers’ counsel incurred in connection with any of the foregoing other than fees of such counsel plus reasonable disbursements incurred in connection with the
preparation, printing and delivery of such Blue Sky memoranda); (c) the issuance and delivery by the Issuer of the Notes and by the Guarantors of the Guarantees and any taxes payable in connection therewith; (d) the qualification of the
Notes for offer and sale under the securities or Blue Sky laws of the several states and any foreign jurisdictions as the Initial Purchasers may reasonably designate (including, without limitation, the reasonable fees and disbursements of the
Initial Purchasers’ counsel relating to such registration or qualification); (e) the furnishing of such copies of the Pricing Disclosure Package and the Final Offering Memorandum, and all amendments and supplements thereto, as may be
reasonably requested for use in connection with the Exempt Resales; (f) the preparation of certificates for the Notes (including, without limitation, printing and engraving thereof); (g) the approval of the Notes by DTC for
“book-entry” transfer (including fees and expenses of counsel for the Initial Purchasers); (h) the rating of the Notes; (i) the obligations of the Trustee, any agent of the Trustee and the counsel for the Trustee in connection
with the Indenture and theNotes; (j) the performance by the Issuer and the 

  
 23 

 
Guarantors of their other obligations under this Agreement; (k) the travel expenses incurred by or on behalf of representatives of the Issuer in connection with attending or hosting meetings
with prospective purchasers of the Notes, and expenses associated with any electronic road show (it being understood that the Initial Purchasers, collectively, shall bear one-half of the costs associated with any chartered aircraft and that the
Issuer and the Initial Purchasers will each pay their own costs associated with hotel accommodations) and (l) any other expenses of each Initial Purchaser and the Issuer incident to the performance by the Issuer of its obligations hereunder;
provided, however, that except as specifically provided in this Section 7 and in Section 12, the Initial Purchasers shall pay their own costs and expenses in connection with their legal counsel and presentations for
prospective purchasers of the Notes. 
 8. Conditions to Initial Purchasers Obligations. The respective obligations of the Initial
Purchasers hereunder are subject to the accuracy in all material respects (except to the extent already qualified by materiality, in which case such obligations shall be subject to the accuracy in all respects), when made and on and as of the
Closing Date, of the representations and warranties of the Issuer and the Guarantors contained herein, to the performance by the Issuer and the Guarantors of their respective obligations hereunder in all material respects, and to each of the
following additional terms and conditions: 
 (a) All corporate proceedings and other legal matters incident to authorization, form and
validity of the Transaction Agreements, the Pricing Disclosure Package and the Final Offering Memorandum shall be reasonably satisfactory in all material respects to counsel for the Initial Purchasers, and the Issuer and the Guarantors shall have
furnished to such counsel all documents and information that they may reasonably request to enable them to pass upon such matters. 
 (b)
Cleary Gottlieb Steen & Hamilton LLP shall have furnished to the Initial Purchasers its written opinion and negative assurance letter, as counsel to the Issuer and the Endurance Guarantors, addressed to the Initial Purchasers and dated the
Closing Date, substantially in the form of Exhibit B and Exhibit C hereto. 
 (c) The Representatives shall have received from Morris,
Nichols, Arsht & Tunnell LLP, special Delaware counsel to the Issuer, Durham, Jones & Pinegar, P.C., special Utah counsel to the Issuer, Troutman Sanders LLP, special Georgia counsel to the Issuer, and Locke Lord LLP, special
Florida counsel to the Issuer, such opinions, dated the Closing Date and addressed to the Initial Purchasers, substantially in the Form of Exhibit E-1 through E-5 hereto. 

(d) The Initial Purchasers shall have received from Milbank, Tweed, Hadley & McCloy LLP, counsel for the Initial Purchasers, such
opinion and negative assurance letter, dated the Closing Date, with respect to the issuance and sale of the Notes, the Pricing Disclosure Package, the Final Offering Memorandum and other related matters as the Initial Purchasers may reasonably
require, and the Issuer and the Guarantors shall have furnished to such counsel such documents and information as such counsel reasonably requests for the purpose of enabling them to pass upon such matters. 

  
 24 

 (e) At the time of execution of this Agreement, the Initial Purchasers shall have received from
BDO USA, LLP and PricewaterhouseCoopers LLP letters, in form and substance satisfactory to the Initial Purchasers, addressed to the Initial Purchasers and dated the date hereof (i) confirming that they are independent public accountants within
the meaning of the Securities Act and the applicable rules and regulations adopted by the Commission and the PCAOB and (ii) stating, as of the date hereof (or, with respect to matters involving changes or developments since the respective dates
as of which specified financial information is given in the Pricing Disclosure Package, as of a date not more than two business days prior to the date hereof), the conclusions and findings of such firm with respect to the financial information and
(iii) covering such other matters as are ordinarily covered by accountants’ “comfort letters” to initial purchasers. 

(f) With respect to the letters of BDO USA, LLP and PricewaterhouseCoopers LLP referred to in the preceding paragraph and delivered to the
Initial Purchasers concurrently with the execution of this Agreement (each, an “initial letter”), the Issuer and the Company shall have furnished to the Initial Purchasers “bring-down letters” of such accountants,
addressed to the Initial Purchasers and dated the Closing Date (i) confirming that they are independent public accountants within the meaning of the Securities Act and the applicable rules and regulations adopted by the Commission and the
PCAOB, (ii) stating, as of the Closing Date (or, with respect to matters involving changes or developments since the respective dates as of which specified financial information is given in each of the Pricing Disclosure Package or the Final
Offering Memorandum, as of a date not more than two business days prior to the Closing Date), the conclusions and findings of such firm with respect to the financial information and other matters covered by each initial letter and
(iii) confirming in all material respects the conclusions and findings set forth in each initial letter. 
 (g) Since the dates as of
which information is given in the Pricing Disclosure Package (exclusive of any amendment or supplement thereto), there shall not have been, or reasonably expected to be, any change or development in the condition (financial or otherwise), business
or results of operations of Holdings, the Issuer and the Issuer’s subsidiaries, taken as a whole and after giving effect to the Transactions, except as set forth in the Pricing Disclosure Package (exclusive of any amendment or supplement
thereto), the effect of which is, or would reasonably be expected to become, in the judgment of the Representatives, so material and adverse as to make it impractical or inadvisable to proceed with the offering, sale or delivery of the Notes on the
terms and in the manner contemplated in the Pricing Disclosure Package (exclusive of any amendment or supplement thereto). 
 (h) The Issuer
and each Guarantor shall have furnished or caused to be furnished to the Initial Purchasers dated as of the Closing Date a certificate of the Chief Executive Officer and Chief Financial Officer of the Issuer and each Guarantor, or other officers
satisfactory to the Initial Purchasers, containing a statement that: 
 (i) The representations and warranties of each of
the Issuer and the Guarantors in Section 2 are true and correct on and as of the Closing Date, and each of the Issuer and the Guarantors have complied with all its respective agreements contained herein and satisfied all the conditions on its
part to be performed or satisfied hereunder at or prior to the Closing Date; and 

  
 25 

 (ii) They have examined the Pricing Disclosure Package and the Final Offering
Memorandum, and, in their opinion, (A) the Pricing Disclosure Package, as of the Applicable Time, and the Final Offering Memorandum, as of the date of the Final Offering Memorandum and as of the Closing Date, did not and do not contain any
untrue statement of a material fact and did not and do not omit to state a material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading and (B) since the date of the
Pricing Disclosure Package and the Final Offering Memorandum, no event has occurred which should have been set forth in a supplement or amendment to the Pricing Disclosure Package and the Final Offering Memorandum that was not set forth in a
supplement or amendment. 
 (i) On or after the Applicable Time (i) no downgrading shall have occurred in the rating accorded the
Issuer’s debt securities by any “nationally recognized statistical rating organization”, as that term is defined by the Commission in Section 15E of the Exchange Act, and (ii) no such organization shall have publicly
announced that it has under surveillance or review, with possible negative implications, its rating of the Issuer’s debt securities. 

(j) The Issuer shall have taken all acts reasonably required to be taken by it to have the Notes be eligible for clearance and settlement
through DTC. 
 (k) The Initial Purchasers shall have received a counterpart of the Registration Rights Agreement that shall have been
executed and delivered by duly authorized officers of the Issuer and each of the Endurance Guarantors. 
 (l) Each of the Issuer, the
Endurance Guarantors and the Trustee shall have executed and delivered the Indenture (including the Guarantees contained therein), and the Initial Purchasers shall have received a copy thereof, duly executed by such parties. 

(m) Each of the Issuer and the Trustee shall have executed and delivered the Notes, and the Initial Purchasers shall have received copies
thereof, duly executed by such parties. 
 (n) Subsequent to the execution and delivery of this Agreement there shall not have occurred any
of the following: (i) trading in securities generally on the New York Stock Exchange, the NASDAQ or the NYSE Amex Equities or in the over-the-counter market shall have been suspended or materially limited or the settlement of such trading
generally shall have been materially disrupted or minimum prices shall have been established on any such exchange or such market by the Commission, by such exchange or by any other regulatory body or governmental authority having jurisdiction,
(ii) a general moratorium on commercial banking activities shall have been declared by federal or state authorities, and (iii) there shall have occurred any outbreak or escalation of hostilities, declaration by the United States of a
national emergency or war, or other calamity or crisis the effect of which on financial markets is such as to make it, in the judgment the Representatives, impractical or inadvisable to proceed with the offering, sale or delivery of the Notes as
contemplated in the Pricing Disclosure Package (exclusive of any amendment or supplement thereto) and the Final Offering Memorandum (exclusive of any amendment or supplement thereto). 

  
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 (o) No action shall have been taken and no statute, rule, regulation or order shall have been
enacted, adopted or issued by any federal, state or foreign governmental or regulatory authority or court that would, as of the Closing Date, prevent the issuance or sale of the Notes or the issuance of the Guarantees. 

(p) The Representatives shall have received on and as of the Closing Date satisfactory evidence of the good standing of the Issuer and the
Guarantors in their respective jurisdictions of organization, in each case in writing or any standard form of telecommunication from the appropriate governmental authorities of such jurisdictions. 

(q) Substantially concurrently with or prior to the issue and sale of the Notes by the Issuer, the Issuer shall have entered into the
Refinancing Revolving Facility and the Incremental Term Facility (and such agreement shall be effective in accordance with its terms); the Representatives shall have received conformed counterparts of the Guarantors thereof and all other documents
and agreements entered into and received thereunder in connection with the closing of the Refinancing Revolving Facility and the Incremental Term Facility in form and substance reasonably satisfactory to the Representatives. 

(r) Substantially concurrently with or prior to the issuance and sale of the Notes by the Issuer, the Issuer shall have consummated the
Transactions. 
 (s) All opinions, letters, evidence and certificates mentioned above or elsewhere in this Agreement shall be deemed to be
in compliance with the provisions hereof only if they are in form and substance reasonably satisfactory to counsel for the Initial Purchasers. 

9. Indemnification and Contribution. 

(a) The Issuer, the Endurance Guarantors, and upon execution and delivery of the Purchase Agreement Joinder, each of the Constant Contact
Guarantors, jointly and severally with the Issuer and the Endurance Guarantors, hereby agrees to indemnify and hold harmless each Initial Purchaser, its directors, officers and employees and each person, if any, who controls, as of the date hereof,
any Initial Purchaser within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act, from and against any loss, claim, damage or liability, joint or several, or any action in respect thereof (including, but not
limited to, any loss, claim, damage, liability or action relating to purchases and sales of Notes), to which that Initial Purchaser, director, officer, employee or controlling person may become subject, under the Securities Act or otherwise, insofar
as such loss, claim, damage, liability or action arises out of, or is based upon, (i) any untrue statement or alleged untrue statement of a material fact contained (A) in the Pricing Disclosure Package, the Final Offering Memorandum, or in
any amendment or supplement thereto or (B) in any Free Writing Offering Document or in the recorded electronic roadshow made available to investors with the written approval of the Issuer (the “Recorded Road Show”), or
(ii) the omission or alleged omission to state in the Pricing Disclosure Package, the Final Offering Memorandum, or in any amendment or supplement thereto or in any Free Writing Offering Document or in the Recorded Road Show, any material fact
necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading, and shall reimburse each Initial Purchaser and each such director, officer,

  
 27 

 
employee or controlling person promptly upon demand, for any legal or other expenses reasonably incurred by that Initial Purchaser, director, officer, employee or controlling person in connection
with investigating or defending or preparing to defend against any such loss, claim, damage, liability or action as such expenses are incurred; provided, however, that the Issuer and the Guarantors shall not be liable in any such case to the
extent that any such loss, claim, damage, liability or action arises out of, or is based upon, any untrue statement or alleged untrue statement or omission or alleged omission made in the Pricing Disclosure Package, the Final Offering Memorandum, or
in any such amendment or supplement thereto or in any Free Writing Offering Document or in the Recorded Road Show, in reliance upon and in conformity with written information concerning such Initial Purchaser furnished to the Issuer through the
Representatives by or on behalf of any Initial Purchaser specifically for inclusion therein, which information consists solely of the information specified in Section 9(e) with respect to the Preliminary Offering Memorandum and the Final
Offering Memorandum. The foregoing indemnity agreement is in addition to any liability that the Issuer or the Guarantors may otherwise have to any Initial Purchaser or to any director, officer, employee or controlling person of that Initial
Purchaser. 
 (b) Each Initial Purchaser, severally and not jointly, hereby agrees to indemnify and hold harmless as of the date hereof, the
Issuer, the Endurance Guarantors, and upon execution and delivery of the Purchase Agreement Joinder, each of the Constant Contact Guarantors and their respective officers and employees, each of their respective directors, and each person, if any,
who controls, as of the date hereof, the Issuer and each Guarantor within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act, from and against any loss, claim, damage or liability, joint or several, or any
action in respect thereof, to which, as of the date hereof, the Issuer, each Guarantor or any such director, officer, employee or controlling person may become subject, under the Securities Act or otherwise, insofar as such loss, claim, damage,
liability or action arises out of, or is based upon, (i) any untrue statement or alleged untrue statement of a material fact contained (A) in the Pricing Disclosure Package or the Final Offering Memorandum or in any amendment or supplement
thereto or (B) in any Free Writing Offering Document or in the Recorded Road Show, or (ii) the omission or alleged omission to state in the Pricing Disclosure Package or the Final Offering Memorandum, or in any amendment or supplement
thereto or in any Free Writing Offering Document or in the Recorded Road Show, any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading, and shall reimburse the
Issuer and the Guarantors and each such director, officer, employee or controlling person promptly upon demand, for any legal or other expenses reasonably incurred by that Initial Purchaser, director, officer, employee or controlling person in
connection with investigating or defending or preparing to defend against any such loss, claim, damage, liability or action as such expenses are incurred, but in each case only to the extent that the untrue statement or alleged untrue statement or
omission or alleged omission was made in reliance upon and in conformity with written information concerning such Initial Purchaser furnished to the Issuer through the Representatives by or on behalf of that Initial Purchaser specifically for
inclusion therein, which information is limited to the information set forth in Section 9(e). The foregoing indemnity agreement is in addition to any liability that any Initial Purchaser may otherwise have to the Issuer, any Guarantor or any
such director, officer, employee or controlling person. 

  
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 (c) Promptly after receipt by an indemnified party under this Section 9 of notice of any
claim or the commencement of any action, the indemnified party shall, if a claim in respect thereof is to be made against the indemnifying party under this Section 9, notify the indemnifying party in writing of the claim or the commencement of
that action; provided, however, that the failure to notify the indemnifying party shall not relieve it from any liability that it may have under Sections 9(a) and (b) above except to the extent it has been materially prejudiced
(through the forfeiture of substantive rights or defenses) by such failure and; provided, further, that the failure to notify the indemnifying party shall not relieve it from any liability that it may have to an indemnified party otherwise than
under Sections 9(a) and (b) above. If any such claim or action shall be brought against an indemnified party, and it shall notify the indemnifying party thereof, the indemnifying party shall be entitled to participate therein and, to the extent
that it wishes, jointly with any other similarly notified indemnifying party, to assume the defense thereof with counsel reasonably satisfactory to the indemnified party. After notice from the indemnifying party to the indemnified party of its
election to assume the defense of such claim or action, the indemnifying party shall not be liable to the indemnified party under this Section 9 for any legal or other expenses subsequently incurred by the indemnified party in connection with
the defense thereof other than reasonable costs of investigation; provided, however, that the indemnified party shall have the right to employ counsel to represent the indemnified party and such indemnified party’s respective
directors, officers, employees and controlling persons who may be subject to liability arising out of any claim in respect of which indemnity may be sought by the indemnified party against the indemnifying party under this Section 9, if
(i) the indemnifying party and the indemnified party shall have so mutually agreed; (ii) the indemnifying party fails within a reasonable time to retain counsel reasonably satisfactory to the indemnified party; (iii) the indemnified
party and its respective directors, officers, employees and controlling persons shall have reasonably concluded, based on the advice of counsel, that there may be legal defenses available to them that are different from or in addition to those
available to the indemnifying party; or (iv) the named parties in any such proceeding (including any impleaded parties) include both the indemnifying party, on the one hand, and the indemnified party, on the other hand, and representation of
both sets of parties by the same counsel would present a conflict due to actual or potential differing interests between them, and in any such event the fees and expenses of such separate counsel shall be paid by the indemnifying party. No
indemnifying party shall (x) without the prior written consent of the indemnified parties (which consent shall not be unreasonably withheld), settle or compromise or consent to the entry of any judgment with respect to any pending or threatened
claim, action, suit or proceeding in respect of which indemnification or contribution may be sought hereunder (whether or not the indemnified parties are actual or potential parties to such claim or action) unless such settlement, compromise or
consent includes an unconditional release of each indemnified party from all liability arising out of such claim, action, suit or proceeding and does not include a statement as to, or an admission of fault, culpability or a failure to act by or on
behalf of any indemnified party, or (y) be liable for any settlement of any such action effected without its written consent (which consent shall not be unreasonably withheld), but if settled with the consent of the indemnifying party or if
there be a final judgment of the plaintiff in any such action, the indemnifying party agrees to indemnify and hold harmless any indemnified party from and against any loss or liability by reason of such settlement or judgment. 

  
 29 

 (d) If the indemnification provided for in this Section 9 shall for any reason be
unavailable to or insufficient to hold harmless an indemnified party under Section 9(a) or 9(b) in respect of any loss, claim, damage or liability, or any action in respect thereof, referred to therein (other than by virtue of the failure of an
indemnified party to notify the indemnifying party of its right to indemnification pursuant to subsection (a) or (b) above, where such failure materially prejudices the indemnifying party (through the forfeiture of substantive rights or
defenses)), then each indemnifying party shall, in lieu of indemnifying such indemnified party, contribute to the amount paid or payable by such indemnified party as a result of such loss, claim, damage or liability, or action in respect thereof,
(i) in such proportion as shall be appropriate to reflect the relative benefits received by the Issuer and each Guarantor, on the one hand, and the Initial Purchasers, on the other, from the offering of the Notes, or (ii) if the allocation
provided by clause (i) above is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) above but also the relative fault of the Issuer and each Guarantor,
on the one hand, and the Initial Purchasers, on the other, with respect to the statements or omissions that resulted in such loss, claim, damage or liability, or action in respect thereof, as well as any other relevant equitable considerations. The
relative benefits received by the Issuer and each Guarantor, on the one hand, and the Initial Purchasers, on the other, with respect to such offering shall be deemed to be in the same proportion as the total net proceeds from the offering of the
Notes purchased under this Agreement (before deducting expenses) received by the Issuer and each Guarantor, on the one hand, and the total discounts and commissions received by the Initial Purchasers with respect to the Notes purchased under this
Agreement, on the other hand, bear to the total gross proceeds from the offering of the Notes under this Agreement. The relative fault shall be determined by reference to whether the untrue or alleged untrue statement of a material fact or omission
or alleged omission to state a material fact relates to information supplied by the Issuer and the Guarantors, on the one hand, or the Initial Purchasers on the other hand, the intent of the parties and their relative knowledge, access to
information and opportunity to correct or prevent such statement or omission and any other equitable considerations appropriate in the circumstances. The Issuer, each Guarantor and the Initial Purchasers agree that it would not be just and equitable
if contributions pursuant to this Section 9(d) were to be determined by pro rata allocation (even if the Initial Purchasers were treated as one entity for such purpose) or by any other method of allocation that does not take into account the
equitable considerations referred to herein. The amount paid or payable by an indemnified party as a result of the loss, claim, damage or liability, or action in respect thereof, referred to above in this Section 9(d) shall be deemed to
include, for purposes of this Section 9(d), any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending or preparing to defend any such action or claim. Notwithstanding the provisions
of this Section 9(d), no Initial Purchaser shall be required to contribute any amount in excess of the amount of discounts and commissions received by such Initial Purchaser with respect to the Notes purchased under this Agreement. No person
guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Initial Purchasers’
obligations to contribute as provided in this Section 9(d) are several in proportion to their respective purchase obligations and not joint. Notwithstanding the foregoing, none of the Constant Contact Guarantors shall have any rights or
obligations pursuant to this Section 9(d) until such time as each of the Constant Contact Guarantors shall have executed and delivered the Purchase Agreement Joinder. 

  
 30 

 (e) The Initial Purchasers severally confirm and the Issuer, the Endurance Guarantors, and upon
the execution and delivery of the Purchase Agreement Joinder, each of the Constant Contact Guarantors acknowledge and agree that the statements with respect to the offering of the Notes by the Initial Purchasers set forth in the second sentence of
the fourth paragraph, the second sentence of the seventh paragraph, the first and second sentences of the eighth paragraph and the second sentence of the twenty-second paragraph of the section entitled “Plan of Distribution” in the Pricing
Disclosure Package and the Final Offering Memorandum are correct and constitute the only information concerning such Initial Purchasers furnished in writing to the Issuer or the Guarantors by or on behalf of the Initial Purchasers specifically for
inclusion in the Pricing Disclosure Package and the Final Offering Memorandum or in any amendment or supplement thereto. 
 (f) The remedies
provided for in this Section 9 are not exclusive and shall not limit any rights or remedies that may otherwise be available to any indemnified party at law or in equity. 

10. Defaulting Initial Purchasers. 

(a) If, on the Closing Date, any Initial Purchaser defaults in its obligations to purchase the Notes that it has agreed to purchase under this
Agreement, the remaining non-defaulting Initial Purchasers may in their discretion arrange for the purchase of such Notes by the non-defaulting Initial Purchasers or other persons satisfactory to the Issuer on the terms contained in this Agreement.
If, within 36 hours after any such default by any Initial Purchaser, the non-defaulting Initial Purchasers do not arrange for the purchase of such Notes, then the Issuer shall be entitled to a further period of 36 hours within which to procure other
persons reasonably satisfactory to the non-defaulting Initial Purchasers to purchase such Notes on such terms. In the event that within the respective prescribed periods, the non-defaulting Initial Purchasers notify the Issuer that they have so
arranged for the purchase of such Notes, or the Issuer notifies the non-defaulting Initial Purchasers that it has so arranged for the purchase of such Notes, either the non-defaulting Initial Purchasers or the Issuer may postpone the Closing Date
for up to seven full business days in order to effect any changes that in the opinion of counsel for the Issuer or counsel for the Initial Purchasers may be necessary in the Pricing Disclosure Package, the Final Offering Memorandum or in any other
document or arrangement, and the Issuer agrees to promptly prepare any amendment or supplement to the Pricing Disclosure Package or the Final Offering Memorandum that effects any such changes. As used in this Agreement, the term “Initial
Purchaser” includes, for all purposes of this Agreement unless the context requires otherwise, any party not listed in Schedule I attached hereto that, pursuant to this Section 10, purchases Notes that a defaulting Initial Purchaser agreed
but failed to purchase. 
 (b) If, after giving effect to any arrangements for the purchase of the Notes of a defaulting Initial Purchaser
or Initial Purchasers by the non-defaulting Initial Purchasers and the Issuer as provided in paragraph (a) above, the aggregate principal amount of such Notes that remains unpurchased does not exceed one-eleventh of the aggregate principal
amount of all the Notes, then the Issuer shall have the right to require each non-defaulting Initial Purchaser to purchase the principal amount of Notes that such Initial Purchaser agreed to purchase hereunder plus such Initial Purchaser’s pro
rata share (based on the principal amount of Notes that such 

  
 31 

 
Initial Purchaser agreed to purchase hereunder) of the Notes of such defaulting Initial Purchaser or Initial Purchasers for which such arrangements have not been made; provided that the
non-defaulting Initial Purchasers shall not be obligated to purchase more than 110% of the aggregate principal amount of Notes that it agreed to purchase on the Closing Date pursuant to the terms of Section 3 hereof. 

(c) If, after giving effect to any arrangements for the purchase of the Notes of a defaulting Initial Purchaser or Initial Purchasers by the
non-defaulting Initial Purchasers and the Issuer as provided in paragraph (a) above, the aggregate principal amount of such Notes that remains unpurchased exceeds one-eleventh of the aggregate principal amount of all the Notes, or if the Issuer
shall not exercise the right described in paragraph (b) above, then this Agreement shall terminate without liability on the part of the non-defaulting Initial Purchasers. Any termination of this Agreement pursuant to this Section 10 shall
be without liability on the part of the Issuer or the Guarantors, except that the Issuer and each of the Guarantors will continue to be liable for the payment of expenses as set forth in Sections 7 and 12 hereof and except that the provisions of
Section 9 hereof shall not terminate and shall remain in effect. 
 (d) Nothing contained herein shall relieve a defaulting Initial
Purchaser of any liability it may have to the Issuer, the Guarantors or any non-defaulting Initial Purchaser for damages caused by its default. 

11. Termination. The obligations of the Initial Purchasers hereunder may be terminated by the Initial Purchasers by notice given to and
received by the Issuer prior to delivery of and payment for the Notes if, prior to that time, any of the events described in Sections 8(f), (h), (m) or (n) hereof shall have occurred or if the Initial Purchasers shall decline to purchase
the Notes for any reason permitted under this Agreement. 
 12. Reimbursement of Initial Purchasers’ Expenses. If the sale of
the Notes provided for herein is not consummated because any condition to the obligations of the Initial Purchasers set forth in Section 8 hereof is not satisfied, because of any termination pursuant to Section 11 hereof or because of any
refusal, inability or failure on the part of the Issuer or the Guarantors to perform any agreement herein or to comply with any provision hereof, other than by reason of a default by any of the Initial Purchasers, including as described in
Section 10 hereof, the Issuer will reimburse the Initial Purchasers through the Representatives on behalf of the Initial Purchasers on demand for all reasonable expenses (including reasonable fees and disbursements of Milbank, Tweed,
Hadley & McCloy LLP) that shall have been incurred by them in connection with the proposed purchase and sale of the Notes. 
 13.
Notices, etc. All statements, requests, notices and agreements hereunder shall be in writing, and: 
 (a) if to any Initial
Purchaser, shall be delivered or sent by hand delivery, mail, telex, overnight courier or facsimile transmission to the Representatives c/o Goldman, Sachs & Co., 200 West Street, New York, New York 10282, Attention: Registration Department,
c/o Credit Suisse Securities (USA) LLC, Eleven Madison Avenue, New York, New York 10010, Attention: LCD-IBCM (Fax: 212-325-4296) and c/o Jefferies LLC, 520 Madison Avenue, New York, New York 10022, Attention: General Counsel and with a copy to
Milbank, Tweed, Hadley & McCloy LLP, 28 Liberty Street, New York, New York 10005, Attention: Rod Miller (Fax: 212-822-5022); 

  
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 (b) if to the Issuer or any Guarantor, shall be delivered or sent by mail, telex, overnight
courier or facsimile transmission to EIG Investors Corp., c/o Endurance International Group Holdings, Inc., 10 Corporate Drive, Burlington, MA 01803, Attention: General Counsel, with a copy to Cleary Gottlieb Steen & Hamilton LLP, One
Liberty Plaza, New York, New York 10006, Attention: Sandra L. Flow, Esq. (Fax: 212-225-3999); 
 provided, however, that any notice to an
Initial Purchaser pursuant to Section 9(c) shall be delivered or sent by hand delivery, mail, telex or facsimile or electronic transmission to such Initial Purchaser at its address set forth in its acceptance telex to the Representatives, which
address will be supplied to any other party hereto by the Representatives upon request. Any such statements, requests, notices or agreements shall take effect at the time of receipt thereof. The Issuer shall be entitled to act and rely upon any
request, consent, notice or agreement given or made on behalf of the Initial Purchasers by the Representatives. 
 14. USA PATRIOT
Act. In accordance with the requirements of the USA Patriot Act (Title III of Pub. L. 107-56 (signed into law October 26, 2001)), the Initial Purchasers are required to obtain, verify and record information that identifies their respective
clients, including the Issuer, which information may include the name and address of their respective clients, as well as other information that will allow the Initial Purchasers to properly identify their respective clients. 

15. Persons Entitled to Benefit of Agreement. This Agreement shall inure to the benefit of and be binding upon the Initial Purchasers,
the Issuer, the Endurance Guarantors, and upon execution and delivery of the Purchase Agreement Joinder, each of the Constant Contact Guarantors and their respective successors, directors, officers and each person or persons, if any, controlling any
of them within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act. This Agreement and the terms and provisions hereof are for the sole benefit of only those persons, except that the representations,
warranties, indemnities and agreements of the Issuer and the Guarantors contained in this Agreement shall also be deemed to be for the benefit of directors, officers and employees of the Initial Purchasers and each person or persons, if any,
controlling any Initial Purchaser within the meaning of Section 15 of the Securities Act. Nothing in this Agreement is intended or shall be construed to give any person, other than the persons referred to in this Section 15, any legal or
equitable right, remedy or claim under or in respect of this Agreement or any provision contained herein. 
 16. Survival. The
respective indemnities, rights of contribution, representations, warranties and agreements of the Initial Purchasers, the Issuer, the Endurance Guarantors, and upon execution and delivery of the Purchase Agreement Joinder, each of the Constant
Contact Guarantors contained in this Agreement or made by or on behalf of them, respectively, pursuant to this Agreement, shall survive the delivery of and payment for the Notes and shall remain in full force and effect, regardless of any
termination of this Agreement or any investigation made by or on behalf of any of them or any person controlling any of them. 

  
 33 

 17. Definition of the Terms “Business Day”, “Affiliate”, and
“Subsidiary”. For purposes of this Agreement, (a) “business day” means any day on which the New York Stock Exchange, Inc. is open for trading, and (b) “affiliate” and “subsidiary” have the
meanings set forth in Rule 405 under the Securities Act. 
 18. Authority of the Representatives. Any action by the Initial
Purchasers hereunder may be taken by Goldman Sachs, Credit Suisse and Jefferies, on behalf of the Initial Purchasers, and any such action taken by Goldman Sachs, Credit Suisse and Jefferies shall be binding upon the Initial Purchasers. 

19. Governing Law & Venue. This Agreement and any claim, controversy or dispute arising under or related to this Agreement
shall be governed by and construed in accordance with the laws of the State of New York. Each of the Issuer, the Guarantors and the Initial Purchasers agrees that any suit, action or proceeding arising out of or based upon this Agreement or the
transactions contemplated hereby may be instituted in any State or U.S. federal court in The City of New York and County of New York, and waives any objection that such party may now or hereafter have to the laying of venue of any such proceeding,
and irrevocably submits to the exclusive jurisdiction of such courts in any suit, action or proceeding. 
 20. Waiver of Jury
Trial. Each of the Initial Purchasers, the Issuer, the Endurance Guarantors, and upon execution and delivery of the Purchase Agreement Joinder, each of the Constant Contact Guarantors hereby irrevocably waives, to the fullest extent permitted by
applicable law, any and all right to trial by jury in any legal proceeding arising out of or relating to this Agreement or the transactions contemplated hereby. 

21. No Fiduciary Duty. The Issuer, the Endurance Guarantors, and upon execution and delivery of the Purchase Agreement Joinder, each of
the Constant Contact Guarantors acknowledges and agrees that in connection with this offering, or any other services the Initial Purchasers may be deemed to be providing hereunder, notwithstanding any preexisting relationship, advisory or otherwise,
between the parties or any oral representations or assurances previously or subsequently made by the Initial Purchasers: (a) no fiduciary or agency relationship between the Issuer, any Guarantor and any other person, on the one hand, and the
Initial Purchasers, on the other, exists; (b) the Initial Purchasers are not acting as advisors, expert or otherwise, to the Issuer or the Guarantors, including, without limitation, with respect to the determination of the purchase price of the
Notes, and such relationship between the Issuer and the Guarantors, on the one hand, and the Initial Purchasers, on the other, is entirely and solely commercial, based on arms-length negotiations; (c) none of the Representatives nor any other
Initial Purchaser is advising the Issuer, the Guarantors or any other person as to any legal, tax, investment, accounting or regulatory matters in any jurisdiction; (d) any duties and obligations that the Initial Purchasers may have to the
Issuer and the Guarantors shall be limited to those duties and obligations specifically stated herein; (e) the Initial Purchasers and their respective affiliates may have interests that differ from those of the Issuer and the Guarantors; and
(f) the Issuer and the Guarantors have consulted their own legal and financial advisors to the extent they deemed appropriate. Each of the Issuer and the Guarantors hereby waives any claims that the Issuer and the Guarantors may have against
the Initial Purchasers with respect to any breach of fiduciary duty in connection with the Notes. 

  
 34 

 22. Counterparts. This Agreement may be executed in one or more counterparts, and if
executed in more than one counterpart, the executed counterparts shall each be deemed to be an original but all such counterparts shall together constitute one and the same instrument. 

23. Headings. The headings herein are inserted for convenience of reference only and are not intended to be part of, or to affect the
meaning or interpretation of, this Agreement. 
 [Remainder of Page Intentionally Left Blank] 

  
 35 

 EXECUTION VERSION 

If the foregoing correctly sets forth the agreement between the Issuer and the Initial Purchasers, please indicate your acceptance in the space provided for
that purpose below. 
  

					
	Very truly yours,
	
	EIG INVESTORS CORP.
			
		 	By:	 	/s/ Hari Ravichandran
		 		 	Name: Hari Ravichandran
		 		 	Title: Chief Executive Officer
	
	ENDURANCE INTERNATIONAL GROUP HOLDINGS, INC.
			
		 	By:	 	/s/ Hari Ravichandran
		 		 	Name: Hari Ravichandran
		 		 	Title: Chief Executive Officer

  
 36 

 
			
	 THE ENDURANCE INTERNATIONAL GROUP, INC.

DOMAIN NAME HOLDING COMPANY, INC.

ENDURANCE INTERNATIONAL GROUP – WEST, INC.

HOSTGATOR.COM LLC
 A SMALL ORANGE, LLC

BLUEHOST INC.
 FASTDOMAIN INC

		
	By:	 	/s/ Hari Ravichandran
		 	 Name: Hari Ravichandran
 Title: Chief
Executive Officer

  
 37 

 Accepted: 
  

			
	 GOLDMAN, SACHS & CO.

CREDIT SUISSE SECURITIES (USA) LLC
 JEFFERIES LLC

	
	GOLDMAN, SACHS & CO.
		
	By:	 	/s/ Ariel Fox
		 	By: Ariel Fox
		 	Name: Vice President
	
	CREDIT SUISSE SECURITIES (USA) LLC
		
	By:	 	/s/ Edward Lee
		 	Name: Edward Lee
		 	Title: Director
	
	JEFFERIES LLC
		
	By:	 	/s/ John C. Duggan
		 	Name: John. C. Duggan
		 	Title: Managing Director

 Acting for themselves and the other several Initial Purchasers named in Schedule I hereto. 

  
 38EX-4.6

 Exhibit 4.6 

EXECUTION VERSION 
 EIG Investors
Corp. 
 10.875% Senior Notes Due 2024 

Exchange and Registration Rights Agreement 

February 9, 2016 
 Goldman,
Sachs & Co., 
 Credit Suisse Securities (USA) LLC 

Jefferies LLC 
 As representatives of the several
Initial Purchasers 
 named in Schedule I to the Purchase Agreement 

c/o Goldman, Sachs & Co. 
 200 West Street 

New York, New York 10282-2198 
 Ladies and
Gentlemen: 
 THIS EXCHANGE AND REGISTRATION RIGHTS AGREEMENT (this “Agreement”) is made and entered into as of
February 9, 2016, among EIG Investors Corp. (the “Issuer”), a Delaware corporation and a wholly owned subsidiary of Endurance International Group Holdings, Inc., a Delaware corporation (“Holdings”), the
guarantors listed in Part A of Schedule II to the Purchase Agreement (as defined below) (the “Endurance Guarantors”) and Goldman, Sachs & Co., Credit Suisse Securities (USA) LLC and Jefferies LLC, as the representatives
(the “Representatives”) of the several initial purchasers (the “Initial Purchasers”) set forth in Schedule I to the Purchase Agreement (as defined below). Upon consummation of the merger of Constant Contact, Inc., a
Delaware corporation (“Constant Contact”), with and into Paintbrush Acquisition Corporation, a wholly owned subsidiary of the Issuer (“Merger Sub”), with Constant Contact continuing as the surviving corporation (the
“Acquisition”), the Issuer will cause each of the guarantors listed in Part B of Schedule II to the Purchase Agreement (the “Constant Contact Guarantors” and together with the Endurance Guarantors, the
“Guarantors”) to execute and deliver a joinder agreement hereto substantially in the form attached as Annex A hereto (the “Registration Rights Agreement Joinder”) and to thereby join and become bound by the
terms, conditions and other provisions of this Agreement. 
 This Agreement is made pursuant to the Purchase Agreement, dated
February 8, 2016 (the “Purchase Agreement”), by and among the Issuer, the Endurance Guarantors and the Representatives, and, after giving effect to the Purchase Agreement Joinder referred to therein, the Constant Contact
Guarantors, which provides for the sale by the Issuer to the Initial Purchasers of $350,000,000 aggregate principal amount of the Issuer’s 10.875% Senior Notes due 2024 (the “Notes”). Pursuant to the Purchase Agreement and the
Indenture (as defined below), the Guarantors (as defined below) are required to guarantee (collectively, the “Guarantees,” and together with the Notes, the 

 
“Securities”) on a senior unsecured basis the Issuer’s obligations under the Notes and the Indenture. As an inducement to the Initial Purchasers to enter into the Purchase
Agreement, the Issuer has agreed to provide to the Initial Purchasers and their direct and indirect transferees the registration rights set forth in this Agreement. The execution and delivery of this Agreement is a condition to the closing under the
Purchase Agreement. 
 In consideration of the foregoing, the parties hereto hereby agree as follows: 

1. Definitions. As used in this Agreement, the following terms shall have the following meanings: 

“Additional Guarantor” shall mean any domestic subsidiary of the Issuer, as acquired or organized after the Closing Date (as
defined below), that is required to execute a supplemental indenture to the Indenture to provide a Guarantee, and its respective successors and assigns. 

“Blackout Period” shall have the meaning set forth in Section 2(b) hereof. 

“Business Day” shall mean any day that is not a Saturday, Sunday or other day on which commercial banks in New York City are
authorized or required by law to remain closed. 
 “Closing Date” shall have the meaning ascribed to it in the Purchase
Agreement. 
 “Constant Contact Guarantors” shall have the meaning set forth in the preamble. 

“Exchange Act” shall mean the Securities Exchange Act of 1934, as amended from time to time. 

“Exchange Dates” shall have the meaning set forth in Section 2(a)(ii) hereof. 

“Exchange Guarantees” shall mean the guarantees on a senior unsecured basis of the Exchange Notes by the Guarantors. 

“Exchange Notes” shall mean senior notes issued by the Issuer containing terms identical to the Notes (except that the
Exchange Notes will not be subject to restrictions on transfer or to any increase in annual interest rate for failure to comply with this Agreement). 

“Exchange Offer” shall mean the offer by the Issuer to exchange Exchange Securities for Registrable Securities pursuant to
Section 2(a) hereof. 
 “Exchange Offer Registration” shall mean a registration under the Securities Act effected
pursuant to Section 2(a) hereof. 
 “Exchange Offer Registration Statement” shall mean an exchange offer registration
statement on Form S-4 (or, if applicable, on another appropriate form) and all amendments and supplements to such registration statement, in each case including the Prospectus contained therein or deemed a part thereof, all exhibits thereto and any
document incorporated by reference therein. 

  
 2 

 “Exchange Securities” shall mean the Exchange Notes together with the Exchange
Guarantees. 
 “FINRA” shall mean the Financial Industry Regulatory Authority, Inc. 

“Free Writing Prospectus” shall mean each free writing prospectus (as defined in Rule 405 under the Securities Act) prepared
by or on behalf of the Issuer or used or referred to by the Issuer in connection with the sale of the Securities or the Exchange Securities. 

“Guarantees” shall have the meaning set forth in the preamble. 

“Guarantors” shall have the meaning set forth in the preamble and shall also include any Additional Guarantors. 

“Holders” shall mean the Initial Purchasers, for so long as they own any Registrable Securities, and each of their successors,
assigns and direct and indirect transferees who become owners of Registrable Securities under the Indenture; provided that, for purposes of Section 4 and Section 5 hereof, the term “Holders” shall include Participating
Broker-Dealers. 
 “Indemnified Person” shall have the meaning set forth in Section 5(c) hereof. 

“Indemnifying Person” shall have the meaning set forth in Section 5(c) hereof. 

“Indenture” shall mean the Indenture relating to the Securities, dated as of February 9, 2016, between the Issuer, the
Guarantors and Wilmington Trust, National Association, as trustee, and as the same may be amended from time to time in accordance with the terms thereof. 

“Initial Purchasers” shall have the meaning set forth in the preamble. 

“Inspector” shall have the meaning set forth in Section 3(a)(xiv) hereof. 

“Issuer” shall have the meaning set forth in the preamble and shall also include the Issuer’s successors. 

“Issuer Information” shall have the meaning set forth in Section 5(a) hereof. 

“Majority Holders” shall mean the Holders of a majority of the aggregate principal amount of the outstanding Registrable
Securities; provided that whenever the consent or approval of Holders of a specified percentage of Registrable Securities is required hereunder, any Registrable Securities owned directly or indirectly by the Issuer or any of its
“affiliates” (within the meaning of Rule 405 under the Securities Act) shall not be counted in determining whether such consent or approval was given by the 

  
 3 

 
Holders of such required percentage or amount; and provided, further, that if the Issuer shall issue any additional Securities under the Indenture prior to consummation of the
Exchange Offer or, if applicable, the effectiveness of any Shelf Registration Statement, such additional Securities and the Registrable Securities to which this Agreement relates shall be treated together as one class for purposes of determining
whether the consent or approval of Holders of a specified percentage of Registrable Securities has been obtained. 
 “Market
Maker” shall mean Goldman, Sachs & Co. and its affiliates (as defined under the rules and regulations of the SEC). 

“Market-Making Conditions” shall have the meaning set forth in Section 2(d). 

“Market-Making Registration” shall have the meaning set forth in Section 2(d). 

“Market-Making Registration Statement” shall mean a “shelf” registration statement of the Issuer and the Guarantors
(which may be the Exchange Offer Registration Statement or the Shelf Registration Statement) that covers any of the Registrable Securities or the Exchange Securities pursuant to the provisions of this Agreement on an appropriate form under Rule 415
under the Securities Act, or any similar rule that may be adopted by the SEC, and all amendments and supplements to such registration statement including post-effective amendments in each case including the Prospectus contained therein or deemed a
part thereof, all exhibits thereto and any document incorporated by reference therein. 
 “Notes” shall have the meaning set
forth in the preamble. 
 “Notice and Questionnaire” shall mean a notice of registration statement and selling security
holder questionnaire distributed to a Holder by the Issuer upon receipt of a Shelf Request from such Holder. 
 “Participating
Broker-Dealer” shall have the meaning set forth in Section 4(a) hereof. 
 “Participating Holder” shall mean
any Holder of Registrable Securities that has returned a completed and signed Notice and Questionnaire to the Issuer in accordance with Section 3(b) hereof. 

“Person” shall mean an individual, partnership, limited liability company, corporation, trust or unincorporated organization,
or a government or agency or political subdivision thereof. 
 “Prospectus” shall mean the prospectus included in, or,
pursuant to the rules and regulations of the Securities Act, deemed a part of, a Registration Statement, including any preliminary prospectus, and any such prospectus as amended or supplemented by any prospectus supplement, including a prospectus
supplement with respect to the terms of the offering of any portion of the Registrable Securities or Exchange Securities covered by a Registration Statement, and by all other amendments and supplements to such prospectus, and in each case including
any document incorporated by reference therein. 

  
 4 

 “Purchase Agreement” shall have the meaning set forth in the preamble. 

“Purchase Agreement Joinder” shall have the meaning set forth in the preamble. 

“Registrable Securities” shall mean the Securities; provided that the Securities shall cease to be Registrable
Securities (i) when a Registration Statement with respect to such Securities has become effective under the Securities Act and such Securities have been exchanged or disposed of pursuant to such Registration Statement, (ii) when such
Securities cease to be outstanding, (iii) except in the case of Securities that otherwise remain Registrable Securities, are held by an Initial Purchaser and are ineligible to be exchanged in the Exchange Offer, when the Exchange Offer is
consummated or (iv) such Securities may be resold without restriction pursuant to Rule 144 (as amended or replaced) under the Securities Act. 

“Registration Default” shall mean the occurrence of any of the following: (i) if required pursuant to Section 2(a)
hereof, the Exchange Offer is not completed on or prior to the Target Registration Date, (ii) the Shelf Registration Statement, if required pursuant to Section 2(b)(i) or Section 2(b)(ii) hereof, has not become effective on or prior
to the Target Registration Date, (iii) if the Issuer receives a Shelf Request pursuant to Section 2(b)(iii), the Shelf Registration Statement required to be filed thereby has not become effective by the later of (a) the Target
Registration Date and (b) 90 days after delivery of such Shelf Request or (iv) the Shelf Registration Statement, if required by this Agreement, has become effective and, subject to any Blackout Period, thereafter ceases to be effective,
whether or not permitted by this Agreement, at any time during the Shelf Effectiveness Period, and, subject to any Blackout Period, such failure to remain effective exists for more than 30 days (whether or not consecutive) in any 12-month period. 
 “Registration Expenses” shall mean any and all expenses incident to
performance of or compliance by the Issuer and the Guarantors with this Agreement, including without limitation: (i) all SEC, stock exchange or FINRA registration, listing and filing fees, (ii) all fees and expenses incurred in connection
with compliance with state securities or blue sky laws (including reasonable fees and disbursements of counsel for any Underwriters, Holders or the Market Maker in connection with blue sky qualification of any Exchange Securities or Registrable
Securities), (iii) all expenses of any Persons in preparing or assisting in preparing, word processing, printing and distributing any Registration Statement, any Prospectus, any Free Writing Prospectus and any amendments or supplements thereto,
any underwriting agreements, securities sales agreements or other similar agreements and any other documents relating to the performance of and compliance with this Agreement, (iv) all rating agency fees, (v) all fees and disbursements
relating to the qualification of the Indenture under applicable securities laws and the Trust Indenture Act, (vi) the reasonable fees and disbursements of the Trustee and its counsel, (vii) the fees and disbursements of counsel for the
Issuer and the Guarantors and in the case of a Shelf Registration Statement, the reasonable fees and disbursements of one counsel for the Participating Holders (which counsel shall be selected by the Participating Holders holding a majority of the
aggregate principal amount of Registrable Securities held by such Participating Holders and which counsel may also be counsel for the Initial Purchasers or the Market Maker) and (viii) the fees 

  
 5 

 
and disbursements of the independent registered public accountants of Holdings, including the expenses of any special audits or “comfort” letters required by or incident to the
performance of and compliance with this Agreement, but excluding fees and expenses of counsel to the Underwriters (other than fees and expenses set forth in clause (ii) above) or the Holders and underwriting discounts and commissions, brokerage
commissions and transfer taxes, if any, relating to the sale or disposition of Registrable Securities by a Holder. 
 “Registration
Rights Agreement Joinder” shall have the meaning set forth in the preamble. 
 “Registration Statement” shall mean
any registration statement of the Issuer and the Guarantors that covers any of the Exchange Securities or Registrable Securities pursuant to the provisions of this Agreement and all amendments and supplements to any such registration statement,
including post-effective amendments, in each case including the Prospectus contained therein or deemed a part thereof, all exhibits thereto and any document incorporated by reference therein. 

“SEC” shall mean the United States Securities and Exchange Commission. 

“Securities” shall have the meaning set forth in the preamble. 

“Securities Act” shall mean the Securities Act of 1933, as amended from time to time. 

“Shelf Effectiveness Period” shall have the meaning set forth in Section 2(b) hereof. 

“Shelf Registration” shall mean a registration effected pursuant to Section 2(b) hereof. 

“Shelf Registration Statement” shall mean a “shelf” registration statement of the Issuer and the Guarantors that
covers all or a portion of the Registrable Securities on an appropriate form under Rule 415 under the Securities Act, or any similar rule that may be adopted by the SEC, and all amendments and supplements to such registration statement, including
post-effective amendments, in each case including the Prospectus contained therein or deemed a part thereof, all exhibits thereto and any document incorporated by reference therein. 

“Shelf Request” shall have the meaning set forth in Section 2(b) hereof. 

“Staff” shall mean the staff of the SEC. 

“Target Registration Date” shall mean the 365th day after the Closing Date (or, if the 365th day is not a Business Day, the
next succeeding Business Day). 
 “Trust Indenture Act” shall mean the Trust Indenture Act of 1939, as amended from time to
time. 

  
 6 

 “Trustee” shall mean the trustee with respect to the Securities under the
Indenture. 
 “Underwriter” shall have the meaning set forth in Section 3(e) hereof. 

“Underwritten Offering” shall mean an offering in which Registrable Securities are sold to an Underwriter for reoffering to
the public. 
 2. Registration Under the Securities Act. (a) To the extent not prohibited by any applicable law or applicable
interpretations of the Staff, unless there are no Registrable Securities outstanding, the Issuer and the Guarantors shall use their commercially reasonable efforts to (1) file with the SEC an Exchange Offer Registration Statement covering an
offer to the Holders to exchange all the Registrable Securities for Exchange Securities, (2) have such Registration Statement become effective for use by one or more Participating Broker-Dealers, (3) commence the Exchange Offer promptly
after the Exchange Offer Registration Statement becomes effective and (4) issue Exchange Securities in exchange for all Registrable Securities tendered in the Exchange Offer on or prior to the Target Registration Date. 

The Issuer shall commence the Exchange Offer by sending the related Prospectus, appropriate letters of transmittal and other accompanying
documents to each Holder stating, in addition to such other disclosures as are required by applicable law, substantially the following: 

(i) that the Exchange Offer is being made pursuant to this Agreement and that all Registrable Securities validly tendered and not properly
withdrawn will be accepted for exchange; 
 (ii) the dates of acceptance for exchange (which shall be a period of at least 20 Business Days
from the date such notice is sent (or longer if required by applicable law)) (the “Exchange Dates”); 
 (iii) that any
Registrable Security not tendered will remain outstanding and continue to accrue interest but will not retain any rights under this Agreement, except as otherwise specified herein; 

(iv) that any Holder electing to have a Registrable Security exchanged pursuant to the Exchange Offer will be required to (A) surrender
such Registrable Security, together with the appropriate letters of transmittal, to the institution and at the address and in the manner specified in the notice, or (B) effect such exchange otherwise in compliance with the applicable procedures
of the depositary for such Registrable Security, in each case prior to the close of business on the last Exchange Date; and 
 (v) that any
Holder will be entitled to withdraw its election, not later than the close of business on the last Exchange Date, by (A) sending to the institution and at the address specified in the notice, a telegram, facsimile transmission or letter setting
forth the name of such Holder, the principal amount of Registrable Securities delivered for exchange and a statement that such Holder is withdrawing its election to have such Securities exchanged or (B) effecting such withdrawal in compliance
with the applicable procedures of the depositary for the Registrable Securities. 

  
 7 

 As a condition to participating in the Exchange Offer, a Holder will be required to represent to
the Issuer and the Guarantors that (1) any Exchange Securities to be received by it will be acquired in the ordinary course of its business, (2) at the time of the commencement of the Exchange Offer, it is not engaged in, and does not
intend to engage in, and it has no arrangement or understanding with any Person to participate in the distribution (within the meaning of the Securities Act) of the Exchange Securities in violation of the provisions of the Securities Act,
(3) it is not an “affiliate” (within the meaning of Rule 405 under the Securities Act) of the Issuer or any Guarantor, (4) if such Holder is a broker-dealer that will receive Exchange Securities for its own account in exchange
for Registrable Securities that were acquired as a result of market-making or other trading activities (other than Securities acquired directly from the Issuer or any of its affiliates), then such Holder will comply with the applicable provisions of
the Securities Act (including, but not limited to, the prospectus delivery requirements thereunder) and (5) it is not acting on behalf of any person who could not truthfully and completely make the representations contained in the foregoing
subclauses (1) through (4). 
 As soon as practicable after the last Exchange Date, the Issuer and the Guarantors shall: 

 

	(I)	accept for exchange Registrable Securities or portions thereof validly tendered and not properly withdrawn pursuant to the Exchange Offer; and 

 

	(II)	deliver, or cause to be delivered, to the Trustee for cancellation all Registrable Securities or portions thereof so accepted for exchange by the Issuer and issue, and cause the Trustee to promptly authenticate and
deliver to each Holder, Exchange Securities equal in principal amount to the principal amount of the Securities tendered by such Holder; provided that, in the case of any Notes held in global form by a depositary, authentication and delivery
to such depositary of one or more replacement Notes in global form in an equivalent principal amount thereto for the account of such Holders in accordance with the Indenture shall satisfy such authentication and delivery requirement.

 The Indenture will provide that the Exchange Securities will not be subject to the transfer restrictions set forth in the
Indenture and that all the Securities will vote and consent together on all matters as one class and that none of the Securities will have the right to vote or consent as a class separate from one another on any matter. 

Interest on each Exchange Security issued pursuant to the Exchange Offer will accrue from the last interest payment date on which interest was
paid on the Securities surrendered in exchange therefor or, if no interest has been paid on the Securities, from the date of original issue of the Securities. 

  
 8 

 The Issuer and the Guarantors shall use their commercially reasonable efforts to complete the
Exchange Offer as provided above and shall comply in all material respects with the applicable requirements of the Securities Act, the Exchange Act and other applicable laws and regulations in connection with the Exchange Offer. The Exchange Offer
shall be conducted in accordance with the terms of this Agreement and shall not be subject to any conditions, except that the Issuer and the Guarantors shall not be required to conduct the Exchange Offer if (i) doing so would violate any
applicable law or applicable interpretations of the Staff, (ii) any action or proceeding is instituted in or threatened in any court or by or before any governmental agency with respect to the Exchange Offer that, in the reasonable judgment of
the Issuer and the Guarantors, might materially impair the ability of the Issuer and the Guarantors to proceed with the Exchange Offer or (iii) any government or regulatory approval to conduct the Exchange Offer has not been obtained that, in
the reasonable judgment of the Issuer and the Guarantors, is necessary for the consummation of the Exchange Offer. 
 (b) In the event that
(i) the Issuer and the Guarantors determine that the Exchange Offer Registration provided for in Section 2(a) hereof is not available or the Exchange Offer may not be completed as soon as practicable after the last Exchange Date because it
would violate an applicable law or applicable interpretations of the Staff, (ii) the Exchange Offer, for any other reason, is not completed by the Target Registration Date or (iii) upon receipt of a written request (a “Shelf
Request”) within 30 days after the consummation of the Exchange Offer from any Initial Purchaser representing that it holds Registrable Securities that are or were ineligible to be exchanged in the Exchange Offer, or (iv) any Holder is
not eligible to participate in the Exchange Offer pursuant to Section 2(a) or, in the case of a Holder who does participate in the Exchange Offer, does not receive freely tradeable Exchange Securities and so notifies the Issuer within 30 days
after such Holder first becomes aware of such restrictions, the Issuer and the Guarantors shall use their commercially reasonable efforts to file with the SEC as soon as practicable after such determination, notification or Shelf Request, as the
case may be, a Shelf Registration Statement providing for the sale of all the Registrable Securities by the Holders thereof and use their commercially reasonable efforts to have such Shelf Registration Statement become effective; provided
that no Holder will be entitled to have any Registrable Securities included in any Shelf Registration Statement, or entitled to use the prospectus forming a part of such Shelf Registration Statement, until such Holder shall have delivered a
completed and signed Notice and Questionnaire and provided such other information regarding such Holder to the Issuer as is contemplated by Section 3(b) hereof. 

In the event that the Issuer and the Guarantors are required to file a Shelf Registration Statement pursuant to clause (iii) of the
preceding paragraph, the Issuer and the Guarantors shall use their commercially reasonable efforts to file and have become effective both an Exchange Offer Registration Statement pursuant to Section 2(a) hereof with respect to all Registrable
Securities and a Shelf Registration Statement (which may be a combined Registration Statement with the Exchange Offer Registration Statement) with respect to offers and sales of Registrable Securities held by the Initial Purchasers after completion
of the Exchange Offer. 

  
 9 

 The Issuer and the Guarantors agree to use their commercially reasonable efforts to keep the
Shelf Registration Statement continuously effective until the earlier of the (1) one-year anniversary of the effectiveness of the Shelf Registration Statement and (2) date when the Securities cease to be Registrable Securities (the
“Shelf Effectiveness Period”); provided that the Issuer and the Guarantors may, for a period (a “Blackout Period”) of up to 60 days in any three-month period, not to exceed 90 days in any twelve-month period,
suspend the use of the Prospectus contained in the Shelf Registration Statement if the Board of Directors of Holdings reasonably determines that the Shelf Registration Statement is not usable under circumstances relating to corporate developments,
public filings with the SEC and similar events. 
 The Issuer and the Guarantors further agree to supplement or amend the Shelf Registration
Statement, the related Prospectus and any Free Writing Prospectus if required by the rules, regulations or instructions applicable to the registration form used by the Issuer for such Shelf Registration Statement or by the Securities Act or by any
other rules and regulations thereunder or if reasonably requested by the Holders of a majority in aggregate principal amount of the Registrable Securities with respect to information relating to one or more of such Holders, and to use their
commercially reasonable efforts to cause any such amendment to become effective, if required. The Issuer and the Guarantors agree to furnish to the Participating Holders copies of any such supplement or amendment promptly after its being used or
filed with the SEC. 
 (c) The Issuer and the Guarantors shall pay all Registration Expenses in connection with any registration pursuant to
Section 2(a) or Section 2(b) hereof. Each Holder shall pay all underwriting discounts and commissions, brokerage commissions and transfer taxes, if any, relating to the sale or disposition of such Holder’s Registrable Securities
pursuant to the Shelf Registration Statement. 
 The Issuer and the Initial Purchasers agree that the Holders will suffer damages if the
Issuer fails to fulfill its obligations under Section 2 or Section 3 hereof and that it would not be feasible to ascertain the extent of such damages with precision. Accordingly, the Issuer and the Guarantors agree to pay, jointly and
severally, as liquidated damages and the sole remedy for monetary damages in connection with a Registration Default, additional interest on the outstanding Registrable Securities if a Registration Default occurs. The interest rate on the Registrable
Securities will be increased by (i) 0.25% per annum for the first 90-day period beginning on the day immediately following such Registration Default and (ii) an additional 0.25% per annum with respect to the subsequent 90-day
period, in each case to but excluding the date such Registration Default ends. A Registration Default ends when the Securities cease to be Registrable Securities or, if earlier, (1) in the case of a Registration Default under clause (i) of
the definition thereof, when the Exchange Offer is completed, (2) in the case of a Registration Default under clause (ii) or clause (iii) of the definition thereof, when the Shelf Registration Statement becomes effective or
(3) in the case of a Registration Default under clause (iv) of the definition thereof, subject to any Blackout Period, when the Shelf Registration Statement again becomes effective. If at any time more than one Registration Default has
occurred and is continuing, then, until the next date that there is no Registration Default, the increase in interest rate provided for by this paragraph shall apply as if there occurred a single Registration Default that begins on the date that the
earliest such Registration Default occurred and ends on such next date that there is no Registration Default. 

  
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 (d) So long as (x) any of the Securities (whether Registrable Securities, Exchange
Securities or otherwise) are outstanding, (y) the Market Maker proposes to make a market in the Registrable Securities or the Exchange Securities as part of its business in the ordinary course and (z) in the reasonable opinion of Goldman,
Sachs & Co., it would be necessary under applicable laws, rules and regulations for the Market Maker to deliver a Prospectus in connection with market-making activities with respect to the Registrable Securities or the Exchange Securities
(clauses (x) through (z) collectively, the “Market-Making Conditions”), the following provisions of this Section 2(d) shall apply for the sole benefit of the Market Maker (it being understood that only a person for
whom the Market-Making Conditions apply at the applicable time shall be entitled to the use of the Market-Making Registration Statement and related provisions of this Agreement at any time). The Issuer and the Guarantors shall use their commercially
reasonable efforts to file with the SEC, a Market-Making Registration Statement providing for the registration, and the sale on a continuous or delayed basis in secondary transactions by the Market Maker, of Registrable Securities or Exchange
Securities (such filing, a “Market-Making Registration”. The Issuer and the Guarantors agree to use their commercially reasonable efforts (i) to have such Market-Making Registration Statement become effective on or prior to
(x) the date the Exchange Offer is completed pursuant to Section 2(a) above or (y) the date the Shelf Registration becomes effective pursuant to Section 2(b) above, and (ii) to keep such Market-Making Registration Statement
continuously effective for so long as the Market-Making Conditions continue to be satisfied; provided, that the Issuer and the Guarantors may suspend the use of the Prospectus contained in the Market-Making Registration Statement for one or
more Blackout Periods if the Board of Directors of Holdings reasonably determines that the Market-Making Registration Statement is not usable under circumstances relating to corporate developments, public filings with the SEC and similar events;
provided, that the Issuer and the Guarantors shall promptly notify the Market Maker when the Market-Making Registration Statement may once again be used; provided, further, that any such Blackout Periods shall not be limited in
frequency or duration. 
 3. Registration Procedures. (a) In connection with their obligations pursuant to Sections 2(a),
2(b) and 2(d) hereof, the Issuer and the Guarantors shall, as soon as reasonably practicable: 
 (i) prepare and file with the SEC a
Registration Statement on the appropriate form under the Securities Act, which form (A) shall be selected by the Issuer, (B) shall, in the case of a Shelf Registration, be available for the sale of the Registrable Securities by the Holders
thereof, and in the case of a Market-Making Registration, be available for the sale of Registrable Securities or Exchange Securities, as the case may be, by the Market Maker, (C) shall comply as to form in all material respects with the
requirements of the applicable form and include all financial statements required by the SEC to be filed therewith, and (D) shall not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein
or necessary in order to make the 

  
 11 

 
statements therein, in the light of the circumstances under which they were made, not misleading; and use their commercially reasonable efforts to cause such Registration Statement to become
effective, and, subject to any Blackout Period, remain effective for the applicable period in accordance with Section 2 hereof; 
 (ii)
subject to any Blackout Period, prepare and file with the SEC such amendments and post-effective amendments to each Registration Statement as may be necessary to keep such Registration Statement effective for the applicable period in accordance with
Section 2 hereof and cause each Prospectus to be supplemented by any required prospectus supplement and, as so supplemented, to be filed pursuant to Rule 424 under the Securities Act; and keep each Prospectus current during the period described
in Section 4(a)(3) of, and Rule 174 under, the Securities Act that is applicable to transactions by brokers or dealers with respect to the Registrable Securities or Exchange Securities; 

(iii) to the extent any Free Writing Prospectus is used, file with the SEC any Free Writing Prospectus that is required to be filed by the
Issuer or the Guarantors with the SEC in accordance with the Securities Act and to retain any Free Writing Prospectus not required to be filed; 

(iv) in the case of a Shelf Registration, furnish to each Participating Holder, to counsel for the Initial Purchasers, to counsel for such
Participating Holders and to each Underwriter of an Underwritten Offering of Registrable Securities, if any, and in the case of a Market-Making Registration, furnish to the Market Maker and its counsel, without charge, an executed or conformed copy
of the applicable Registration Statement and as many copies of each Prospectus, preliminary prospectus or Free Writing Prospectus, and any amendment or supplement thereto, as such Participating Holder, counsel, Underwriter or Market Maker may
reasonably request in order to facilitate the sale or other disposition of the Registrable Securities or Exchange Securities, as the case may be, thereunder; and, subject to Section 3(c) hereof, the Issuer and the Guarantors consent to the use
of such Prospectus, preliminary prospectus or such Free Writing Prospectus and any amendment or supplement thereto in accordance with applicable law by each of the Participating Holders, any such Underwriters and the Market Maker in connection with
the offering and sale of the Registrable Securities or Exchange Securities, as the case may be, covered by and in the manner described in such Prospectus, preliminary prospectus or such Free Writing Prospectus or any amendment or supplement thereto
in accordance with applicable law; 
 (v) use their commercially reasonable efforts to register or qualify the Registrable Securities or
Exchange Securities, as the case may be, under all applicable state securities or blue sky laws of such jurisdictions as any Participating Holder or the Market Maker shall reasonably request in writing by the time the applicable Registration
Statement becomes effective; reasonably cooperate with such Participating Holders and the Market Maker in connection with any filings required to be made with FINRA; and do any and all other acts and things (including by way of obtaining any
necessary governmental consents or approvals, if any) that may be reasonably necessary or advisable to enable each Participating Holder and the Market Maker to complete the 

  
 12 

 
disposition in each such jurisdiction of the Registrable Securities owned by such Participating Holder and the transactions in the Registrable Securities and Exchange Securities by the Market
Maker; provided that neither the Issuer nor any Guarantor shall be required to (1) qualify as a foreign corporation or other entity or as a dealer in securities in any such jurisdiction where it would not otherwise be required to so
qualify, (2) file any general consent to service of process in any such jurisdiction or (3) subject itself to taxation in any such jurisdiction if it is not so subject; 

(vi) notify counsel for the Initial Purchasers and, in the case of a Shelf Registration, notify each Participating Holder and counsel for such
Participating Holders and, in the case of a Market-Making Registration, notify the Market Maker and counsel for the Market Maker promptly and, if requested by any such Participating Holder, Market Maker or counsel, as the case may be, confirm such
advice in writing (1) when a Registration Statement has been filed and become effective, when any post-effective amendment thereto has been filed and becomes effective, when any Free Writing Prospectus
has been filed or any amendment or supplement to the Prospectus or any Free Writing Prospectus has been filed, (2) of any comments or request by the SEC or any state securities authority for amendments and supplements to a Registration
Statement, Prospectus or any Free Writing Prospectus or for additional information after the Registration Statement has become effective, (3) of the issuance by the SEC or any state securities authority of any stop order suspending the
effectiveness of a Registration Statement or the initiation of any proceedings for that purpose, including the receipt by the Issuer of any notice of objection of the SEC to the use of a Registration Statement or any post-effective amendment thereto
pursuant to Rule 401(g)(2) under the Securities Act, or the happening of any event that causes the Issuer to become an “ineligible issuer” as defined in Rule 405 under the Securities Act, (4) if, between the applicable effective date
of a Shelf Registration Statement and the closing of any sale of Registrable Securities covered thereby, the representations and warranties of the Issuer or any Guarantor contained in any underwriting agreement, securities sales agreement or other
similar agreement, if any, relating to an offering of such Registrable Securities cease to be true and correct in all material respects, (5) if, between the applicable effective date of a Shelf Registration Statement and the closing of any sale
of Registrable Securities covered thereby or during the effectiveness of a Market-Making Registration Statement pursuant to Section 2(d) hereof, the Issuer or any Guarantor receives any notification with respect to the suspension of the
qualification of the Registrable Securities for sale in any jurisdiction or the initiation of any proceeding for such purpose, (6) of the happening of any event during the period a Registration Statement is effective that makes any statement
made in such Registration Statement or the related Prospectus or any Free Writing Prospectus untrue in any material respect or that requires the making of any changes in such Registration Statement or Prospectus or any Free Writing Prospectus in
order to make the statements therein not misleading and (7) of any determination by the Issuer or any Guarantor that a post-effective amendment to a Registration Statement or any amendment or supplement to the Prospectus or any Free Writing
Prospectus would be appropriate; 

  
 13 

 (vii) use their commercially reasonable efforts to obtain the withdrawal of any order suspending
the effectiveness of a Registration Statement or, in the case of a Shelf Registration or Market-Making Registration, the resolution of any objection of the SEC pursuant to Rule 401(g)(2) under the Securities Act, including by filing an amendment to
such Registration Statement on the proper form, as soon as practicable and provide immediate notice to each Holder, Participating Holder or Market Maker, as the case may be, of the withdrawal of any such order or such resolution; 

(viii) in the case of a Shelf Registration or a Market-Making Registration, to the extent the Registrable Securities or Exchange Securities are
certificated, reasonably cooperate with the Participating Holders or the Market Maker, as the case may be, to facilitate the timely preparation and delivery of certificates representing Registrable Securities or Exchange Securities to be sold and
not bearing any restrictive legends and enable such Registrable Securities or Exchange Securities to be issued in such denominations and registered in such names (consistent with the provisions of the Indenture) as such Participating Holders or the
Market Maker may reasonably request at least one Business Day prior to the closing of any sale of Registrable Securities or Exchange Securities; 

(ix) subject to any Blackout Period, upon the occurrence of any event contemplated by Section 3(a)(vi)(5) hereof, use their commercially
reasonable efforts to prepare and file with the SEC a supplement or post-effective amendment to the applicable Registration Statement or the related Prospectus or any Free Writing Prospectus or any document incorporated therein by reference or file
any other required document so that, as thereafter delivered (or, to the extent permitted by law, made available) to purchasers of the Registrable Securities or Exchange Securities, as the case may be, such Prospectus or Free Writing Prospectus, as
the case may be, will not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; and the Issuer shall
notify the Participating Holders (in the case of a Shelf Registration Statement), the Initial Purchasers and any Participating Broker-Dealers known to the Issuer (in the case of an Exchange Offer Registration Statement) and the Market Maker (in the
case of a Market-Making Registration Statement) to suspend use of the Prospectus or any Free Writing Prospectus as promptly as practicable after the occurrence of such an event, and such Participating Holders, such Participating Broker-Dealers, the
Initial Purchasers and the Market Maker, as applicable, hereby agree to suspend use of the Prospectus or any Free Writing Prospectus, as the case may be, until the Issuer and the Guarantors have amended or supplemented the Prospectus or the Free
Writing Prospectus, as the case may be, to correct such misstatement or omission; 
 (x) a reasonable time prior to the filing of any
Registration Statement, any Prospectus, Free Writing Prospectus or amendment of or supplement to a Registration Statement or a Prospectus or Free Writing Prospectus (excluding any document that is to be incorporated by reference into a Registration
Statement, Prospectus or Free Writing Prospectus), provide copies of such document to the Initial Purchasers and their counsel (and, in the case of a Shelf Registration Statement, to the Participating Holders and their counsel) or in the case of a
Market-Making Registration Statement, to the Market Maker and its counsel, and make such of the representatives of the Issuer and Holdings as shall be reasonably requested by the Initial Purchasers or their counsel (and, in the case of a

  
 14 

 
Shelf Registration Statement, the Participating Holders or their counsel) or in the case of a Market-Making Registration Statement, the Market Maker or its counsel, available for discussion of
such document; and the Issuer and the Guarantors shall not, at any time after initial filing of a Registration Statement, use or file any Prospectus, Free Writing Prospectus or amendment of or supplement to a Registration Statement or a Prospectus
or Free Writing Prospectus (excluding any document that is to be incorporated by reference into a Registration Statement, Prospectus or Free Writing Prospectus) of which the Initial Purchasers and their counsel (and, in the case of a Shelf
Registration Statement, the Participating Holders and their counsel) or in the case of a Market-Making Registration Statement, the Market Maker and its counsel, shall not have previously been advised and furnished a copy or to which the Initial
Purchasers or their counsel (and, in the case of a Shelf Registration Statement, the Participating Holders or their counsel) or in the case of a Market-Making Registration Statement, the Market Maker and its counsel, shall reasonably object; 

(xi) use their commercially reasonable efforts to obtain a CUSIP number for all Exchange Securities or Registrable Securities, as the case may
be, not later than the initial effective date of a Registration Statement; 
 (xii) use their commercially reasonable efforts to cause the
Indenture to be qualified under the Trust Indenture Act in connection with the registration of the Exchange Securities or Registrable Securities, as the case may be; reasonably cooperate with the Trustee and the Holders to effect such changes to the
Indenture as may be required for the Indenture to be so qualified in accordance with the terms of the Trust Indenture Act; and execute, and use their commercially reasonable efforts to cause the Trustee to execute, all documents as may be required
to effect such changes and all other forms and documents required to be filed with the SEC to enable the Indenture to be so qualified in a timely manner; 

(xiii) in the event that the filing of a Registration Statement requires the appointment of a new trustee under the Indenture, appoint a new
trustee thereunder pursuant to the applicable provisions of the Indenture; 
 (xiv) in the case of a Shelf Registration or a Market-Making
Registration, make available for inspection by a representative of the Participating Holders (an “Inspector”), any Underwriter participating in any disposition pursuant to such Shelf Registration Statement, the Market Maker (in the
case of a Market-Making Registration), any attorneys and accountants designated by a majority in aggregate principal amount of the Notes held by the Participating Holders, any attorneys and accountants designated by such Underwriter, and any
attorneys and accountants designated by the Market Maker, as the case may be, at reasonable times and in a reasonable manner, all pertinent financial and other records, documents and properties of Holdings and the Guarantors, and cause the
respective officers, directors and employees of Holdings and the Guarantors to supply all information reasonably requested by any such Inspector, Underwriter, Market Maker, attorney or accountant, as the case may be, in connection with such Shelf
Registration Statement or Market-Making Registration Statement; provided that if any such information is identified by Holdings or any Guarantor as being confidential or 

  
 15 

 
proprietary, each Person receiving such information shall take such actions as are reasonably necessary to protect the confidentiality of such information to the extent such action is otherwise
not inconsistent with, an impairment of or in derogation of the rights and interests of any such Inspector, Holder, Underwriter or Market Maker; 

(xv) in the case of a Shelf Registration, use their commercially reasonable efforts to cause all Registrable Securities to be listed on any
securities exchange or any automated quotation system on which similar securities issued or guaranteed by the Issuer or any Guarantor are then listed if requested by the Majority Holders, to the extent such Registrable Securities satisfy applicable
listing requirements; 
 (xvi) if reasonably requested by any Participating Holder or the Market Maker, promptly include in a Prospectus
supplement or post-effective amendment such information with respect to such Participating Holder or Market Maker, as such Participating Holder or Market Maker, as the case may be, reasonably requests to be included therein and make all required
filings of such Prospectus supplement or such post-effective amendment as soon as the Issuer has received notification of the matters to be so included in such filing; 

(xvii) in the case of a Shelf Registration or Market-Making Registration, enter into such customary agreements and take all such other actions
in connection therewith (including those requested by the Holders of a majority in principal amount of the Registrable Securities covered by the Shelf Registration Statement) in order to expedite or facilitate the disposition of such Registrable
Securities or Exchange Securities, as the case may be, including (in the case of a Shelf Registration), but not limited to, an Underwritten Offering and in connection therewith, (1) to the extent possible, agree to customary indemnity and
contribution provisions and make such representations and warranties to the Participating Holders and any Underwriters of such Registrable Securities with respect to the business of the Issuer, Holdings and the Issuer’s subsidiaries and the
Registration Statement, Prospectus, any Free Writing Prospectus and documents incorporated by reference or deemed incorporated by reference therein, if any, in each case, in form, substance and scope as are customarily made by issuers to
underwriters in underwritten offerings and confirm the same if and when requested, (2) solely with respect to an Underwritten Offering, obtain opinions of counsel to the Issuer and the Guarantors (which counsel and opinions, in form, scope and
substance, shall be reasonably satisfactory to the Participating Holders, such Underwriters and their respective counsel) addressed to each Participating Holder and Underwriter of Registrable Securities, covering the matters customarily covered in
opinions requested in underwritten offerings, (3) solely with respect to an Underwritten Offering, obtain “comfort” letters from the independent registered public accountants of Holdings (and, if necessary, any other registered public
accountant of any subsidiary of the Issuer, including Constant Contact, or of any other business acquired by the Issuer for which financial statements and financial data are or are required to be included in the Registration Statement) addressed to
each Participating Holder (to the extent permitted by applicable professional standards) and Underwriter of Registrable Securities, such letters to be in customary form and covering matters of the type customarily covered in “comfort”
letters in connection with underwritten offerings, including but not limited to 

  
 16 

 
financial information contained in any preliminary prospectus, Prospectus or Free Writing Prospectus and (4) deliver such documents and certificates as may be reasonably requested by the
Holders of a majority in principal amount of the Registrable Securities being sold or the Underwriters, and which are customarily delivered in underwritten offerings, to evidence the continued validity of the representations and warranties of the
Issuer and the Guarantors made pursuant to clause (1) above and to evidence compliance with any customary conditions contained in an underwriting agreement; 

(xviii) make generally available to each Participating Holder no later than eighteen months after the effective date of a Registration
Statement, an “earning statement” of Holdings complying with Section 11(a) of the Securities Act (including, at the option of the Issuer, Rule 158 thereunder); and 

(xix) so long as any Registrable Securities remain outstanding, cause each Additional Guarantor upon the creation or acquisition by the Issuer
of such Additional Guarantor, to execute a counterpart to this Agreement in the form attached hereto as Annex B and to deliver such counterpart, together with an opinion of counsel as to the enforceability thereof against such entity, to the
Initial Purchasers no later than five Business Days following the execution thereof. 
 (b) In the case of a Shelf Registration Statement,
the Issuer may require each Holder of Registrable Securities to furnish to the Issuer a Notice and Questionnaire and such other information regarding such Holder and the proposed disposition by such Holder of such Registrable Securities as the
Issuer may from time to time reasonably request in writing. 
 (c) Each Participating Holder and the Market Maker agree that, upon receipt of
any notice from the Issuer of the occurrence of any event of the kind described in Section 3(a)(vi)(3) or Section 3(a)(vi)(5) hereof or of a Blackout Period, such Participating Holder or the Market Maker, as the case may be, will forthwith
discontinue disposition of Registrable Securities or Exchange Securities, as the case may be, pursuant to the applicable Registration Statement until such Participating Holder’s or the Market Maker’s receipt of the copies of the
supplemented or amended Prospectus and any related Free Writing Prospectus or notice that the Blackout Period has terminated and, if so directed by the Issuer, such Participating Holder or Market Maker, as the case may be, will deliver to the Issuer
all copies in its possession, other than permanent file copies then in such Participating Holder’s or the Market Maker’s possession, of the Prospectus and any Free Writing Prospectus covering such Registrable Securities or Exchange
Securities that is current at the time of receipt of such notice. 
 (d) If the Issuer shall give any notice to suspend the disposition of
Registrable Securities pursuant to an Exchange Offer Registration Statement or a Shelf Registration Statement or of any Blackout Period with respect thereto, the Issuer and the Guarantors shall extend the period during which such Registration
Statement shall be maintained effective pursuant to this Agreement by the number of days during the period from and including the date of the giving of such notice to and including the date when the Holders of such Registrable Securities shall have
received copies of the supplemented or amended Prospectus or any Free Writing Prospectus or any other notice necessary to resume such dispositions. 

  
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 (e) The Participating Holders who desire to do so may sell Registrable Securities in an
Underwritten Offering. In any such Underwritten Offering, the investment bank or investment banks and manager or managers (each an “Underwriter”) that will administer the offering will be selected by the Holders of a majority in
principal amount of the Registrable Securities included in such offering. 
 (f) Each Participating Holder and the Market Maker will furnish
to the Issuer and the Guarantors such information regarding such Participating Holder or the Market Maker, as the case may be, and the distribution of such Registrable Securities or Exchange Securities as the Issuer may from time to time reasonably
request in writing. Each Participating Holder and the Market Maker agree to notify the Issuer and the Guarantors as promptly as practicable of any inaccuracy or change in information previously furnished by such Participating Holder or the Market
Maker, as the case may be, to the Issuer and the Guarantors or of the happening of any event, in either case as a result of which any Prospectus relating to such registration contains an untrue statement of a material fact regarding such
Participating Holder or the Market Maker or the distribution of such Registrable Securities or Exchange Securities or omits to state any material fact regarding such Participating Holder or the Market Maker or the distribution of such Registrable
Securities or Exchange Securities required to be stated therein or necessary to make the statements therein, in light of the circumstances in which they were made, not misleading, and to furnish to the Issuer and the Guarantors promptly any
additional information required to correct and update any previously furnished information or required such that such Prospectus shall not contain, with respect to such Participating Holder or the Market Maker or the distribution of such Registrable
Securities or Exchange Securities, an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances in which they were made, not
misleading. 
 4. Participation of Broker-Dealers in Exchange Offer. (a) The Staff has taken the position that any broker-dealer
that receives Exchange Securities for its own account in the Exchange Offer in exchange for Securities that were acquired by such broker-dealer as a result of market-making or other trading activities (a “Participating
Broker-Dealer”) may be deemed to be an “underwriter” within the meaning of the Securities Act and must deliver a prospectus meeting the requirements of the Securities Act in connection with any resale of such Exchange Securities.

 The Issuer and the Guarantors understand that it is the Staff’s position that if the Prospectus contained in the Exchange Offer
Registration Statement includes a plan of distribution containing a statement to the above effect and the means by which Participating Broker-Dealers may resell the Exchange Securities, without naming the
Participating Broker-Dealers or specifying the amount of Exchange Securities owned by them, such Prospectus may be delivered by Participating Broker-Dealers (or, to the extent permitted by law, made available to purchasers) to satisfy their
prospectus delivery obligation under the Securities Act in connection with resales of Exchange Securities for their own accounts, so long as the Prospectus otherwise meets the requirements of the Securities Act. 

  
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 (b) In light of the above, and notwithstanding the other provisions of this Agreement, the Issuer
and the Guarantors agree to amend or supplement the Prospectus contained in the Exchange Offer Registration Statement for a period of up to 180 days after the Exchange Offer Registration Statement becomes effective (as such period may be extended
pursuant to Section 3(c) hereof), in order to expedite or facilitate the disposition of any Exchange Securities by Participating Broker-Dealers consistent with the positions of the Staff recited in Section 4(a) above. The Issuer and the
Guarantors further agree that Participating Broker-Dealers shall be authorized to deliver such Prospectus (or, to the extent permitted by law, make available) during such period in connection with the resales contemplated by this Section 4.

 (c) The Initial Purchasers shall have no liability to the Issuer, any Guarantor or any Holder with respect to any request that they may
make pursuant to Section 4(b) hereof. 
 5. Indemnification and Contribution. (a) Each of the Issuer, the Endurance
Guarantors, and upon execution and delivery of the Registration Rights Agreement Joinder, each of the Constant Contact Guarantors, jointly and severally with the Issuer and each of the Endurance Guarantors, hereby agrees to indemnify and hold
harmless each of the Participating Holders as holders of Registrable Securities included in an Exchange Offer Registration Statement and, each of the Participating Holders as holders of Registrable Securities included in a Shelf Registration
Statement and the Market Maker as a holder of Registrable Securities or Exchange Securities included in a Market-Making Registration Statement from and against any loss, claim, damage or liability, joint or several, to which such Participating
Holder or the Market Maker may become subject, under the Securities Act or otherwise, insofar as such loss, claim, damage, liability or action arises out of, or is based upon, (i) an untrue statement or alleged untrue statement of a material
fact contained in any Registration Statement under which such Registrable Securities or Exchange Securities were registered under the Securities Act, or any Prospectus or Free Writing Prospectus contained therein or furnished by the Issuer to any
such Participating Holder or the Market Maker, or (ii) the omission or alleged omission to state therein any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not
misleading, and shall reimburse each such Participating Holder and the Market Maker promptly upon demand, for any legal or other expenses reasonably incurred by them in connection with investigating or defending or preparing to defend against any
such loss, claim damage, liability or action as such expenses are incurred; provided, however, that the Issuer and the Guarantors shall not be liable in any such case to the extent that any such loss, claim, damage, liability or action arises
out of, or is based upon, any untrue statement or alleged untrue statement or omission or alleged omission made in such Registration Statement, Prospectus or Free Writing Prospectus, in reliance upon and in conformity with written information
furnished to the Issuer by such person specifically for inclusion therein. The foregoing indemnity agreement is in addition to any liability that the Issuer or the Guarantors may otherwise have to each such Participating Holder and the Market Maker.

  
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 (b) Each Holder, severally and not jointly, hereby agrees to indemnify and hold harmless, the
Issuer, the Initial Purchasers, the Market Maker and the other selling Holders, the Endurance Guarantors, and upon execution and delivery of the Registration Rights Agreement Joinder, each of the Constant Contact Guarantors and their respective
officers, each of their respective directors, each of their respective officers who signed the Registration Statement and each Person, if any, who controls, as of the date hereof, the Issuer and each Guarantor, any Initial Purchaser, the Market
Maker and any other selling Holder within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act, to the same extent as the indemnity set forth in paragraph (a) above, but only with respect to any losses,
claims, damages or liabilities that arise out of, or are based upon, any untrue statement or omission or alleged untrue statement or omission made in reliance upon and in conformity with written information concerning such Holder furnished to the
Issuer and the Guarantors by or behalf of that Holder specifically for inclusion in any Registration Statement, any Prospectus and any Free Writing Prospectus. The foregoing indemnity agreement is in addition to any liability that any Holder may
otherwise have to the Issuer, any Guarantor or any such director, officer or controlling person. 
 (c) Promptly after receipt by an
indemnified party under either paragraph (a) or (b) above (such party, an “Indemnified Person”) of notice of claim or commencement of any action, the Indemnified Person shall, if a claim in respect thereof is to be made
against the indemnifying party under either paragraph (a) or (b) above, notify the Person against whom such indemnification may be sought (the “Indemnifying Person”) in writing of the claim or the commencement of that
action; provided, however, that the failure to so notify the Indemnifying Person shall not relieve it from any liability that it may have under paragraph (a) or (b) above except to the extent it has been materially prejudiced
(through the forfeiture of substantive rights or defenses) by such failure and; provided, further, that the failure to notify the Indemnifying Person shall not relieve it from any liability that it may have to an Indemnified Person otherwise
than under paragraph (a) or (b) above. If any such claim or action shall be brought against an Indemnified Person, and it shall notify the Indemnifying Person thereof, the Indemnifying Person shall be entitled to participate therein and,
to the extent that it wishes, jointly with any other similarly notified Indemnifying Person, to assume the defense thereof with counsel reasonably satisfactory to the Indemnified Person. After notice from the Indemnifying Person to the Indemnified
Person of its election to assume the defense of such claim or action, the Indemnifying Person shall not be liable to the Indemnified Person under this Section 5 for any legal or other expenses subsequently incurred by the Indemnified Person in
connection with the defense thereof other than reasonable costs of investigation; provided, however, that the Indemnified Person shall have the right to employ counsel to represent the Indemnified Person and such Indemnified Person’s
respective directors, officers and controlling persons who may be subject to liability arising out of any claim in respect of which indemnity may be sought by the Indemnified Person against the Indemnifying Person under this Section 5, if
(i) the Indemnifying Person and the Indemnified Person shall have so mutually agreed; (ii) the Indemnifying Person fails within a reasonable time to retain counsel reasonably satisfactory to the Indemnified Person; (iii) the
Indemnified Person and its respective directors, officers and controlling persons shall have reasonably concluded, based on the 

  
 20 

 
advice of counsel, that there may be legal defenses available to them that are different from or in addition to those available to the Indemnifying Person; or (iv) the named parties in any
such proceeding (including any impleaded parties) include both the Indemnifying Person, on the one hand, and the Indemnified Person, on the other hand, and representation of both sets of parties by the same counsel would present a conflict due to
actual or potential differing interests between them, and in any such event the fees and expenses of such separate counsel shall be paid by the Indemnifying Person. No Indemnifying Person shall (x) without the prior written consent of the
Indemnified Persons (which consent shall not be unreasonably withheld), settle or compromise or consent to the entry of any judgment with respect to any pending or threatened claim, action, suit or proceeding in respect of which indemnification or
contribution may be sought hereunder (whether or not the Indemnified Persons are actual or potential parties to such claim or action) unless such settlement, compromise or consent includes an unconditional release of each Indemnified Person from all
liability arising out of such claim, action, suit or proceeding and does not include a statement as to, or an admission of fault, culpability or a failure to act by or on behalf of any Indemnified Person, or (y) be liable for any settlement of
any such action effected without its written consent (which consent shall not be unreasonably withheld), but if settled with the consent of the Indemnifying Person or if there be a final judgment of the plaintiff in any such action, the Indemnifying
Person agrees to indemnify and hold harmless any Indemnified Person from and against any loss or liability by reason of such settlement or judgment. 

(d) If the indemnification provided for in this Section 5 shall for any reason be unavailable to or insufficient to hold harmless an
Indemnified Person under paragraph (a) or (b) above in respect of any loss, claim, damage or liability, or any action in respect thereof, referred to therein (other than by virtue of the failure of an Indemnified Person to notify the
Indemnifying Person of its right to indemnification pursuant to paragraph (a) or (b) above, where such failure materially prejudices the Indemnifying Person (through the forfeiture of substantive rights or defenses)), then each
Indemnifying Person shall, in lieu of indemnifying such Indemnified Person, contribute to the amount paid or payable by such Indemnified Person as a result of such loss, claim, damage or liability, or action in respect thereof, (i) in such
proportion as shall be appropriate to reflect the relative benefits received by the Indemnifying Person, on the one hand, and the Indemnified Person, on the other, from the offering of the Securities or the Exchange Securities, or (ii) if the
allocation provided by clause (i) above is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) above but also the relative fault of the Indemnifying
Person, on the one hand, and the Indemnified Person, on the other, with respect to the statements or omissions that resulted in such loss, claim, damage or liability, or action in respect thereof, as well as any other relevant equitable
considerations. The relative benefits received by the Issuer and the Guarantors, on the one hand, and the Holders on the other, with respect to such offering shall be deemed to be in the same proportion as the total net proceeds from the offering of
the Securities (before deducting expenses) received by the Issuer and the Guarantors, on the one hand, and the total discounts and commissions received by the Holders with respect to the Securities, on the other hand, bear to the total gross
proceeds from the offering of the Securities. The relative fault shall be determined by reference to whether the untrue or alleged untrue statement of a material fact or omission or alleged omission 

  
 21 

 
to state a material fact relates to information supplied by the Issuer and the Guarantors, on the one hand, or the Holders on the other hand, the intent of the parties and their relative
knowledge, access to information and opportunity to correct or prevent such statement or omission and any other equitable considerations appropriate in the circumstances. The Issuer, each Guarantor and the Holders agree that it would not be just and
equitable if contributions pursuant to this Section 5(d) were to be determined by pro rata allocation (even if the Holders were treated as one entity for such purpose) or by any other method of allocation that does not take into account the
equitable considerations referred to herein. The amount paid or payable by an Indemnified Person as a result of the loss, claim, damage or liability, or action in respect thereof, referred to above in this Section 5(d) shall be deemed to
include, for purposes of this Section 5(d), any legal or other expenses reasonably incurred by such Indemnified Person in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this
Section 5(d), no Holder shall be required to contribute any amount in excess of the amount of discounts and commissions received by such Holder with respect to the Securities. No person guilty of fraudulent misrepresentation (within the meaning
of Section 11(f) of the Securities Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Holders’ obligations to contribute as provided in this Section 5(d) are several in
proportion to their respective purchase obligations and not joint. Notwithstanding the foregoing, none of the Constant Contact Guarantors shall have any rights or obligations pursuant to this Section 5(d) until such time as each of the Constant
Contact Guarantors shall have executed and delivered the Registration Rights Agreement Joinder. 
 (e) The remedies provided for in this
Section 5 are not exclusive and shall not limit any rights or remedies that may otherwise be available to any Indemnified Person at law or in equity. 

(f) The indemnity and contribution provisions contained in this Section 5 shall remain operative and in full force and effect regardless
of (i) any termination of this Agreement, (ii) any investigation made by or on behalf of the Initial Purchasers or the Market Maker or any Holder or any Person controlling any Initial Purchaser, the Market Maker or any Holder, or by or on
behalf of the Issuer or the Guarantors or the officers or directors of or any Person controlling the Issuer or the Guarantors, (iii) acceptance of any of the Exchange Securities and (iv) any sale of Registrable Securities pursuant to a
Shelf Registration Statement. 
 6. General. 

(a) No Inconsistent Agreements. The Issuer and the Guarantors represent, warrant and agree that (i) the rights granted to the
Holders hereunder do not in any way conflict with and are not inconsistent with the rights granted to the holders of any other outstanding securities issued or guaranteed by the Issuer or any Guarantor, as applicable, under any other agreement and
(ii) neither the Issuer nor any Guarantor has entered into, or on or after the date of this Agreement will enter into, any agreement that is inconsistent with the rights granted to the Holders of Registrable Securities in this Agreement or
otherwise conflicts with the provisions hereof. 

  
 22 

 (b) Amendments and Waivers. The provisions of this Agreement, including the
provisions of this sentence, may not be amended, modified or supplemented, and waivers or consents to departures from the provisions hereof may not be given unless the Issuer and the Guarantors have obtained the written consent of Holders of at
least a majority in aggregate principal amount of the outstanding Registrable Securities affected by such amendment, modification, supplement, waiver or consent; provided that no amendment, modification, supplement, waiver or consent to any
departure from the provisions of Section 6 hereof shall be effective as against any Holder of Registrable Securities unless consented to in writing by such Holder. Any amendments, modifications, supplements, waivers or consents pursuant to this
Section 6(b) shall be in writing and executed by each of the parties hereto. 
 (c) Notices. All notices and other
communications provided for or permitted hereunder shall be made in writing by hand-delivery, registered first-class mail, facsimile, or any courier guaranteeing overnight delivery (i) if to a Holder, at the most current address given by such
Holder to the Issuer by means of a notice given in accordance with the provisions of this Section 6(c), which address initially is, with respect to each Initial Purchaser, its address set forth in the Purchase Agreement; (ii) if to the
Issuer and the Guarantors, initially at the Issuer’s address set forth in the Purchase Agreement and thereafter at such other address, notice of which is given in accordance with the provisions of this Section 6(c); and (iii) to such
other persons at their respective addresses as provided in the Purchase Agreement and thereafter at such other address, notice of which is given in accordance with the provisions of this Section 6(c). All such notices and communications shall
be deemed to have been duly given: at the time delivered by hand, if personally delivered; five Business Days after being deposited in the mail, postage prepaid, if mailed; when receipt is acknowledged, if sent by facsimile; and on the next Business
Day if timely delivered to an air courier guaranteeing overnight delivery. Copies of all such notices, demands or other communications shall be concurrently delivered by the Person giving the same to the Trustee, at the address specified in the
Indenture.  
 (d) Successors and Assigns. This Agreement shall inure to the benefit of and be binding upon the
successors, assigns and transferees of each of the parties, including, without limitation and without the need for an express assignment, subsequent Holders; provided that nothing herein shall be deemed to permit any assignment, transfer or
other disposition of Registrable Securities in violation of the terms of the Purchase Agreement or the Indenture. If any transferee of any Holder shall acquire Registrable Securities in any manner, whether by operation of law or otherwise, such
Registrable Securities shall be held subject to all the terms of this Agreement, and by taking and holding such Registrable Securities such Person shall be conclusively deemed to have agreed to be bound by and to perform all of the terms and
provisions of this Agreement and such Person shall be entitled to receive the benefits hereof. The Initial Purchasers (in their capacity as Initial Purchasers) shall have no liability or obligation to the Issuer or the Guarantors with respect to any
failure by a Holder to comply with, or any breach by any Holder of, any of the obligations of such Holder under this Agreement.  

  
 23 

 (e) Third Party Beneficiaries. Each Holder shall be a third party beneficiary to
the agreements made hereunder between the Issuer and the Guarantors, on the one hand, and the Initial Purchasers, on the other hand, and shall have the right to enforce such agreements directly to the extent it deems such enforcement necessary or
advisable to protect its rights or the rights of other Holders hereunder.  
 (f) Counterparts. This Agreement may be
executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.  

(g) Headings. The headings in this Agreement are for convenience of reference only, are not a part of this Agreement and shall
not limit or otherwise affect the meaning hereof.  
 (h) Governing Law. THE VALIDITY AND INTERPRETATION OF THIS
AGREEMENT, AND THE TERMS AND CONDITIONS SET FORTH HEREIN SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK APPLICABLE TO CONTRACTS MADE AND TO BE PERFORMED WHOLLY THEREIN, WITHOUT GIVING EFFECT TO ANY PROVISIONS
THEREOF RELATING TO CONFLICTS OF LAW.  
 (i) Entire Agreement; Severability. This Agreement contains the entire
agreement between the parties relating to the subject matter hereof and supersedes all oral statements and prior writings with respect thereto. If any term, provision, covenant or restriction contained in this Agreement is held by a court of
competent jurisdiction to be invalid, void or unenforceable or against public policy, the remainder of the terms, provisions, covenants and restrictions contained herein shall remain in full force and effect and shall in no way be affected, impaired
or invalidated. The Issuer, the Guarantors and the Initial Purchasers shall endeavor in good faith negotiations to replace the invalid, void or unenforceable provisions with valid provisions the economic effect of which comes as close as possible to
that of the invalid, void or unenforceable provisions. 
 [Remainder of page intentionally left blank] 

  
 24 

 IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first written above.

  

			
	EIG INVESTORS CORP.
		
	  By:	 	/s/ Hari Ravichandran
		 	Name: Hari Ravichandran
		 	Title: Chief Executive Officer and President

  

			
	 ENDURANCE INTERNATIONAL GROUP

HOLDINGS, INC.
 THE ENDURANCE INTERNATIONAL

GROUP, INC.
 ENDURANCE INTERNATIONAL GROUP –

WEST, INC.
 DOMAIN NAME HOLDING COMPANY, INC.

HOSTGATOR.COM LLC
 A SMALL ORANGE, LLC

BLUEHOST INC.
 FASTDOMAIN INC

		
	  By:	 	/s/ Hari Ravichandran
		 	 Name: Hari Ravichandran
 Title: Chief
Executive Officer and President

 [Signature Page to Registration Rights Agreement] 

 Confirmed and accepted as of the date first above written: 

 

			
	 For themselves and on behalf of the

several Initial Purchasers
  

GOLDMAN, SACHS & CO.

		
	By	 	/s/ Michael Hickey
	Name: Michael Hickey
	Title: Managing Director

  

			
	CREDIT SUISSE SECURITIES (USA) LLC
		
	By	 	/s/ Hayes Smith
	Name: Hayes Smith
	Title: Managing Director

  

			
	JEFFERIES LLC
		
	By	 	/s/ John C. Duggan
	Name: John C. Duggan
	Title: Managing Director

 [Signature Page to Registration Rights Agreement] 

 Annex A 

JOINDER AGREEMENT TO EXCHANGE AND REGISTRATION RIGHTS AGREEMENT [            ],
2016 
 Reference is hereby made to the Exchange and Registration Rights Agreement, dated as of February 9, 2016 (the
“Registration Rights Agreement”), by and among EIG INVESTORS CORP. (the “Issuer”), the guarantors listed in Part A of Schedule II to the Purchase Agreement (as defined in the Registration Rights Agreement) and
GOLDMAN, SACHS & CO., CREDIT SUISSE SECURITIES (USA) LLC and JEFFERIES LLC, as the representatives of the several Initial Purchasers. Unless otherwise defined herein, terms defined in the Registration Rights Agreement and used herein shall
have the meanings given to them in the Registration Rights Agreement. 
 1. Joinder of the Guarantor. Each other signatory hereto
(each, a “Guarantor”), hereby agrees to become bound by the terms, conditions and other provisions of the Registration Rights Agreement with all attendant rights, duties and obligations stated therein, with the same force and effect
as if originally named as “Guarantor” therein and as if such Guarantor executed the Registration Rights Agreement on the date thereof. 

2. Governing Law. This Registration Rights Agreement Joinder, and any claim, controversy or dispute arising under or related to this
Registration Rights Agreement Joinder, shall be governed by and construed in accordance with the laws of the State of New York. 
 3.
Counterparts. This agreement may be executed in any number of counterparts and by the parties hereto in separate counterparts, each of which when so executed shall be deemed to be an original and all of which taken together shall constitute
one and the same agreement. 
 4. Amendments. No amendment or waiver of any provision of this Registration Rights Agreement Joinder,
nor any consent or approval to any departure therefrom, shall in any event be effective unless the same shall be in writing and signed by the parties hereto. 

5. Headings. The headings in this Registration Rights Agreement Joinder are for convenience of reference only and shall not limit or
otherwise affect the meaning hereof. 
 [Signature Page Follows] 

 IN WITNESS WHEREOF, the undersigned have executed this Registration Rights Agreement Joinder as
of the date first written above. 
  

			
	CONSTANT CONTACT, INC.
		
	By:	 	 
	Name:
	Title:

  

			
	CARDSTAR, INC.
		
	By:	 	 
	Name:
	Title:

  

			
	SINGLEPLATFORM, LLC
		
	By:	 	 
	Name:
	Title:

  

			
	CARDSTAR PUBLISHING, LLC
		
	By:	 	 
	Name:
	Title:

 Annex B 

Counterpart to Exchange and Registration Rights Agreement 

The undersigned hereby absolutely, unconditionally and irrevocably agrees as a Guarantor (as defined in the Exchange and Registration Rights
Agreement, dated as of February 9, 2016, by and between EIG Investors Corp., a Delaware corporation, the guarantors listed in Part A of Schedule II to the Purchase Agreement (as defined in the Registration Rights Agreement) and Goldman,
Sachs & Co., Credit Suisse Securities (USA) LLC and Jefferies LLC, as the representatives of the several Initial Purchasers) to be bound by the terms and provisions of such Registration Rights Agreement. 

IN WITNESS WHEREOF, the undersigned has executed this counterpart as of
                        . 
  

			
	[NAME]
		
	By:	 	 
		 	Name:
		 	Title:

  
 Annex B-1

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