Document:

Exhibit 10.4

 

,
2021

 

FTAC
Zeus Acquisition Corp.

2929
Arch Street, Suite 1703

Philadelphia,
PA 19104-2870

 

Re:
Initial Public Offering

 

Ladies
and Gentlemen:

 

This letter (“Letter
Agreement”) is being delivered to you in accordance with the Underwriting Agreement (the “Underwriting Agreement”)
entered into, or proposed to be entered into, by and among FTAC Zeus Acquisition Corp., a Delaware corporation (the “Company”),
and Citigroup Global Markets Inc., as the representative of the underwriters (the “Underwriters”), relating
to an underwritten initial public offering (the “Offering”), of up to 34,500,000 of the Company’s units
(the “Units”), each comprised of one share of the Company’s Class A common stock, par value $0.0001 per
share (the “Common Stock”), and one half of one warrant, each whole warrant exercisable for one share of Common
Stock (each, a “Warrant”). The Units sold in the Offering will be registered under the Securities Act of 1933,
as amended (the “Securities Act”), pursuant to a registration statement on Form S-1 and prospectus (the “Prospectus”)
filed by the Company with the Securities and Exchange Commission (the “Commission”). The Company expects that
the Units will be listed for trading on the Nasdaq Global Market. Certain capitalized terms used herein are defined in paragraph 16 hereof.

 

The
Insiders signatory hereto hereby agree with the Company as follows:

 

1.
Each Insider agrees that, if the Company seeks stockholder approval of (a) a proposed initial
Business Combination or (b) a proposed amendment to the Company’s amended and restated certificate of incorporation (as may be
amended from time to time, the “Charter”) to modify the substance or timing of the Company’s obligation
to redeem 100% of the Offering Shares if the Company does not complete its initial Business Combination within 18 months from the date of the completion of the Offering, or 21 months from the date of the completion of the Offering if the Company
has executed a letter of intent, agreement in principle or definitive agreement for its initial business combination within 18 months
from the date of completion of the Offering, but has not completed the business combination within such 18-month period (the “Completion
Window”), then in connection with such proposed initial Business Combination or amendment to the Charter, such person shall vote,
as applicable, all Founder Shares, Placement Shares and any shares acquired by such person in the Offering or in the secondary public
market in favor of such proposed initial Business Combination or such amendment to the Charter, as applicable.

 

2. (a)
Each Insider hereby agrees that, if the Company fails to consummate a Business Combination within the Completion Window, such person shall take all reasonable steps to cause the Company to (i) cease all operations except
for the purpose of winding up, (ii) as promptly as reasonably possible but not more than ten business days thereafter, redeem the
Offering Shares at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust Account, including
any amounts representing interest earned on the Trust Account, less interest previously released to, or reserved for use by, the
Company in an amount up to $100,000 to pay dissolution expenses and less any other interest released to, or reserved for use by, the
Company to pay franchise and income taxes, divided by the number of Offering Shares then outstanding, which redemption will
completely extinguish the holder’s rights as a stockholder with respect to his, her or its Offering Shares (including the
right to receive further liquidation distributions, if any), subject to applicable law, and (iii) as promptly as reasonably possible
following such redemption, subject to the approval of the Company’s remaining stockholders and the Company’s board of
directors (the “Board”), dissolve and liquidate, subject in the case of clauses (ii) and (iii) to the
Company’s obligations under Delaware law to provide for claims of creditors and other requirements of applicable
law.

 

(b)
Each Insider agrees to not propose any amendment to the Charter that would affect the substance or timing of the Company’s
obligation to redeem 100% of the Offering Shares if the Company does not consummate a Business Combination within the Completion
Window, unless the Company provides the holders of Offering Shares with the opportunity to redeem their Offering Shares
upon approval of any such amendment at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the
trust account, including any amounts representing interest earned on the Trust Account, less any interest released to, or reserved
for use by, the Company to pay franchise and income taxes, divided by the number of then outstanding Offering Shares.

 

     

     

    

 

(c)
Each Insider acknowledges and agrees that Founder Shares or Placement Shares held by him, her
or it are not entitled to, and have no right, interest or claim of any kind in or to, any monies held in the Trust Account or distributed
as a result of any liquidation of the Trust Account.

 

(d)
Each Insider waives, with respect to any Founder Shares or Placement Shares held by such undersigned party, any redemption rights
he, she or it may have (i) in connection with the consummation of an initial Business Combination, (ii) if the Company fails to
consummate its initial Business Combination or liquidates within the Completion Window or (iii) if the Company seeks an amendment to
its Charter that would affect the substance or timing of the Company’s obligation to redeem 100% of the Offering Shares as
described above. If any of the Insiders should acquire Offering Shares in or after the Offering, each Insider hereby waives with
respect to such Offering Shares held by such undersigned party any redemption rights such party may have in connection with the
consummation of a Business Combination or a stockholder vote to amend the Charter to modify the substance or timing of the
Company’s obligation to redeem 100% of the Offering Shares if the Company does not complete its initial Business Combination
within the Completion Window; provided, however, that the Insiders will be entitled to
redemption rights with respect to such Offering Shares held by them if the Company fails to consummate a Business Combination or
liquidates within the Completion Window.

 

3.
(a) To the extent that the Underwriters do not exercise in full their over-allotment option to purchase an additional 4,500,000 Units
(as described in the Prospectus), the Initial Holders shall return to the Company for cancellation, at no cost, an aggregate number
of Founder Shares determined by multiplying 1,522,500 by a fraction: (i) the numerator of which is 4,500,000 minus the number of shares
of the Common Stock purchased by the Underwriters upon the exercise of their over-allotment option, and (ii) the denominator of which
is 4,500,000. The Initial Holders further agree that, if the Company effects a stock split, stock dividend, reverse stock split, contribution
back to capital or otherwise in connection with any increase or decrease in the size of the Offering, to the extent that the Underwriters
do not exercise their over-allotment option in full, the aggregate number of shares that the Initial Holders will be required to return
to the Company as set forth in the immediately preceding sentence shall be adjusted so that the Founder Shares held by the Initial Holders
and their Permitted Transferees represent 25% of the Company’s issued and outstanding shares of Common Stock immediately following
such forfeiture. The number of Founder Shares to be returned by each Initial Holder, if any, pursuant to this Section 3(a) shall be determined
on a pro-rata basis based on the percentage of outstanding Founder Shares held by each Initial Holder at the time of such forfeiture.

 

(b)
Subject to paragraph 3(d), the Founder Shares owned by the Insiders shall not be transferable
or salable (x)(a) with respect to 25% of such shares, until consummation of a Business Combination, (b) with respect to 25% of such shares,
when the closing price of the Common Stock exceeds $12.00 for any 20 trading days within a 30-trading day period following the consummation
of a Business Combination, (c) with respect to 25% of such shares, when the closing price of the Common Stock exceeds $13.50 for any
20 trading days within a 30-trading day period following the consummation of a Business Combination, and (d) with respect to 25% of such
shares, when the closing price of the Common Stock exceeds $15.00 for any 20 trading days within a 30-trading day period following the
consummation of a Business Combination or earlier, in any case, if, following a Business Combination (y) the Company completes a liquidation,
merger, stock exchange or other similar transaction that results in all of the Company’s stockholders having the right to exchange
their shares of Common Stock for cash, securities or other property (such applicable period being the “Founder Lock-Up Period”).
During the Founder Lock-Up Period, the Insiders shall not, except as described in the Prospectus, (I) sell, offer to sell, contract or
agree to sell, hypothecate, pledge, grant any option to purchase or otherwise dispose of or agree to dispose of, directly or indirectly,
or establish or increase a put equivalent position or liquidate or decrease a call equivalent position within the meaning of Section
16 of the Securities Exchange Act of 1934, as amended, and the rules and regulations of the Commission promulgated thereunder (the “Exchange
Act”), with respect to the Founder Shares then subject to the Founder Lock-Up Period, (II) enter into any swap or other
arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any of the Founder Shares
then subject to the Founder Lock-Up Period, whether any such transaction is to be settled by delivery of the Common Stock or such other
securities, in cash or otherwise, or (III) publicly announce any intention to effect any transaction specified in clause (b)(I) or (b)(II).

 

    2

     

    

 

(c)
Until 30 days after the consummation of the initial Business Combination (“Placement
Unit Lock-Up Period”), the Sponsor shall not, except as described in the Prospectus, (i) sell, offer to sell, contract
or agree to sell, hypothecate, pledge, grant any option to purchase or otherwise dispose of or agree to dispose of, directly or indirectly,
or establish or increase a put equivalent position or liquidate or decrease a call equivalent position within the meaning of Section
16 of the Exchange Act with respect to the Placement Units, Placement Shares, Placement Warrants, or shares of Common Stock underlying
the Placement Warrants, (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic
consequences of ownership of any of the Placement Units, Placement Shares, Placement Warrants, or shares of Common Stock underlying the
Placement Warrants, whether any such transaction is to be settled by delivery of the Common Stock or such other securities, in cash or
otherwise, or (iii) publicly announce any intention to effect any transaction specified in clause (c)(i) or (c)(ii).

 

(d)
Notwithstanding the provisions contained in paragraphs 3(b) and 3(c) hereof, any Insider may
transfer, as applicable, the Founder Shares and/or Placement Units, Placement Shares, Placement Warrants, or shares of Common Stock underlying
the Placement Warrants (1) in connection with an initial Business Combination with the consent of the Company to any third party that
agrees in writing to be bound by the provisions of this agreement applicable to Insiders (other than paragraph 1 and the second sentence
of paragraph 2(d)); and (2) (a) to the Company’s officers, the Company’s directors, the Initial Holders, or other Insiders,
(b) to an affiliate or immediate family member of any of the Company’s officers and directors, Initial Holders, or other Insiders,
(c) to any member, officer or director of the Sponsor, or any immediate family member, partner, affiliate or employee of a member of
the Sponsor, (d) by gift to any Permitted Transferee under any of the immediately preceding subsections (a) through (c), a trust, the
beneficiaries of which are one or more Permitted Transferees under any of the immediately preceding subsections (a) through (c), or a
charitable organization, (e) by virtue of laws of descent and distribution upon death of any of the Company’s officers, the Company’s
directors, the Initial Holders, or members of the Sponsor, (f) pursuant to a qualified domestic relations order, (g) in the event of
the Company’s liquidation prior to consummation of its initial Business Combination, (h) by virtue of the laws of Delaware, the
Sponsor’s limited liability company agreement upon dissolution of the Sponsor, (i) subsequent to the Company’s consummation
of its initial Business Combination, in the event of a liquidation, merger, stock exchange or other similar transaction which results
in all of the Company’s stockholders having the right to exchange their shares of Common Stock for cash, securities or other property,
(j) subsequent to the Company’s consummation of its initial Business Combination, in the event of a consolidation, merger or other
similar transaction in which the Company is the surviving entity that results in the directors and officers of the Company ceasing to
comprise a majority of the Board (in the case of directors) or management (in the case of officers) of the surviving entity or (k) through
private sales or transfers made in connection with any forward purchase agreement or similar arrangement or in connection with the consummation
of the Company’s initial Business Combination at prices no greater than the price at which the Founder Shares, Placement Shares
or Placement Warrants were originally purchased (each, a “Permitted Transferee”); provided, however,
that, in the case of subclauses (a) through (f), (h) and (k), these transferees enter into a written agreement with the Company
agreeing to be bound by the transfer restrictions set forth herein. For the avoidance of doubt, for the purposes of this Agreement, a
managed account managed by the same investment manager of any member of the Sponsor shall be deemed an affiliate of such member.

 

(e)
Further, each Insider agrees that after the Founder Lock-Up Period or the Placement Unit Lock-Up Period, as applicable, has elapsed,
the Founder Shares and/or Placement Units, Placement Shares, Placement Warrants, or shares of Common Stock underlying the Placement
Warrants owned by such Insider shall only be transferable or saleable pursuant to a sale registered under the Securities Act or
pursuant to an available exemption from registration under the Securities Act. The Company and each Insider acknowledges that
pursuant to that certain registration rights agreement to be entered into among the Company and certain security holders of the
Company, parties to the agreement may request that a registration statement relating to the Founder Shares and/or Placement Units,
Placement Shares, Placement Warrants, or shares of Common Stock underlying the Placement Warrants be filed by the Company with the
Commission prior to the end of the Founder Lock-Up Period or the Placement Unit Lock-Up Period, as the case may be; provided, however,
that such registration statement does not become effective prior to the end of the Founder Lock-Up Period or the Placement Unit
Lock-Up Period, as applicable.

 

(f)
Subject to the limitations described herein, each Insider shall retain all of such Insider’s rights as a security holder
during, as applicable, the Founder Lock-Up Period and/or Placement Unit Lock-Up Period including, without limitation, the right to
vote, as the case may be, the Founder Shares and/or Placement Shares.

 

(g)
During the Founder Lock-Up Period and Placement Unit Lock-Up Period, all dividends payable in cash with respect to such securities
shall be paid, as applicable, to each security holder, but all dividends payable in Common Stock or other non-cash property shall
become subject to the applicable lock-up period as described herein and shall only be released from such lock-up in accordance with
the provisions of this paragraph 3.

 

    3

     

    

 

4.
Without limiting the provisions of paragraph 3(d) hereof, during the period commencing
on the effective date of the Underwriting Agreement and ending 180 days after such date, each of the undersigned shall not (i) sell,
offer to sell, contract or agree to sell, hypothecate, pledge, grant any option to purchase or otherwise dispose of or agree to dispose
of, directly or indirectly, or establish or increase a put equivalent position or liquidate or decrease a call equivalent position within
the meaning of Section 16 of the Exchange Act with respect to any Units, Placement Units, shares of Common Stock, Warrants, Placement
Shares, Placement Warrants or any securities convertible into, or exercisable, or exchangeable for, shares of Common Stock owned by an
undersigned party, (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic
consequences of ownership of any Units, Placement Units, shares of Common Stock, Warrants, Placement Shares, Placement Warrants or any
securities convertible into, or exercisable, or exchangeable for, shares of Common Stock owned by the undersigned, whether any such transaction
is to be settled by delivery of such securities, in cash or otherwise, or (iii) publicly announce any intention to effect any transaction
specified in clause (i) or (ii); provided, however, that the restrictions of this Section 4 shall not apply to any distributions
by the Sponsor to its members of Units, Placement Units, shares of Common Stock, Warrants, Placement Shares, Placement Warrants or any
securities convertible into, or exercisable, or exchangeable for, shares of Common Stock.

 

5. (a) In the event
of the liquidation of the Trust Account without the consummation of a Business Combination, the Sponsor (the “Indemnitor”)
agrees to indemnify and hold harmless the Company against any and all loss, liability, claim, damage and expense whatsoever (including,
but not limited to, any and all legal or other expenses reasonably incurred in investigating, preparing or defending against any litigation,
whether pending or threatened, or any claim whatsoever) to which the Company may become subject as a result of any claim by (i) any third
party for services rendered or products sold to the Company or (ii) any prospective target business (a “Target”)
as described in the Prospectus; provided, however, that such indemnification of the Company by the Indemnitor shall apply
only to the extent necessary to ensure that such claims by a third party for services rendered or products sold to the Company or a Target
do not reduce the amount of funds in the Trust Account to below $10.15 (regardless of whether or not the Underwriters exercise any portion
of their overallotment option) per Offering Share and only if such third party or Target has not executed an agreement waiving claims
against any and all rights to seek access to the Trust Account, regardless of whether such agreement is enforceable. In the event that
any such executed waiver is deemed to be unenforceable against such third party, the Indemnitor shall not be responsible for any liability
as a result of any such third party claims. Notwithstanding any of the foregoing, indemnification of the Company by the Indemnitor pursuant
to this paragraph 5 shall not apply as to any claims arising from the Company’s obligation pursuant to the Underwriting Agreement
to indemnify the Underwriters.

 

(b)
If the Company is liquidated within the Completion Window, to the extent that interest income on the balance of the Trust Account (net
of any taxes payable) released to the Company in an amount up to $100,000 to pay dissolution expenses and any other interest released
to, or reserved for use by, the Company to pay franchise and income taxes and loans from the Sponsor (each as described in the Prospectus)
are insufficient to fund the costs and expenses of liquidation, the Indemnitor agrees to pay the balance of the amount necessary to complete
the liquidation of the Company. 

 

6. The
Company agrees that the Company will not engage any third party to render services, agree to purchase any products from such third
party, or enter into any discussion or any acquisition agreement with a Target unless (i) such third party or Target has agreed to
execute a waiver against any right, title, interest or claim of any kind in or to any monies held in the Trust Account or any
proceeds from the Trust Account, that is acceptable to the Board or (ii) the Board and the Sponsor have each consented in writing to
dispense with such waiver with respect to such services, product, discussions or acquisition agreement, in each case with the
written consent of the Indemnitor as part of the consent of the Board. In addition the Company shall endeavor, together with the
officers and directors of any acquisition target for its initial Business Combination, to obtain waivers of claims to the monies
held in the Trust Account from creditors of such acquisition target (which, for the avoidance of doubt, shall include creditors
existing prior to the initial Business Combination as well as after completion of the initial Business Combination).

 

7. In
order to minimize potential conflicts of interest that may arise from multiple corporate affiliations, each officer and director of
the Company who is signatory to this Agreement agrees that until the earliest of the Company’s initial Business Combination,
liquidation or the time at which such person ceases to be an officer or director of the Company, such person shall present to the
Company for its consideration, prior to presentation to any other entity, any suitable Business Combination opportunities of which
such person (or companies or entities which such person manages or controls) becomes aware, subject to any current or future
fiduciary or contractual obligations of such person that such person discloses to the Company.

 

    4

     

    

 

8. Each
officer and director signatory hereto represents and warrants that the biographical information furnished to the Company by him or
her is true and accurate in all material respects and does not omit any material information with respect to such person’s
background. Each of the answers of such person to the items in questionnaires furnished to the Company by such officer
and director is true and accurate in all material respects.

 

9.
Each of the undersigned represents and warrants that her, she or it:

 

(a)
is not subject to or a respondent in any legal action for any injunction, cease-and-desist order or order or stipulation to desist
or refrain from any act or practice relating to the offering of securities in any jurisdiction;

 

(b)
has never been convicted of, or pleaded guilty to, any crime (i) involving fraud, (ii) relating to any financial transaction or
handling of funds of another person, or (iii) pertaining to any dealings in any securities, and the undersigned is not currently a
defendant in any such criminal proceeding; and

 

(c)
has never been suspended or expelled from membership in any securities or commodities exchange
or association or had a securities or commodities license or registration denied, suspended or revoked.

 

10.
Each Insider agrees that he, she or it shall receive no finder’s fees, consulting
fees or other similar compensation from the Company prior to, or for any services they render in order to effectuate, the consummation
of the initial Business Combination, other than the following:

 

(a)
repayment of loans made to the Company by the Sponsor or its affiliate prior to completion of the Offering in connection with
organizational expenses and the preparation, filing and consummation of the Offering;

 

(b)
payments to the Sponsor or its affiliate of a total of $40,000 per month for office space, administrative and shared personnel
support services, pursuant to an Administrative Services Agreement;

 

(c)
repayment of loans, if any, and on such terms as to be determined by the Company from time
to time, made by the Sponsor or one of its affiliates to finance transaction costs in connection with an intended initial Business Combination,
provided, that, if the Company does not consummate an initial Business Combination, a portion of the working capital held outside
the Trust Account may be used by the Company to repay such loaned amounts. Up to $2,000,000 of such loans may be convertible into units
at a price of $10.00 per unit at the option of the lender. Such units would be identical to the Placement Units;

 

(d) payment of customary fees
for financial advisory services as described in the Prospectus;

 

(e) at the closing of an initial
Business Combination, at the option of the Company’s management team, a customary advisory fee, if any, to affiliates of the Sponsor,
in an amount that constitutes a market standard advisory fee for comparable transactions and services provided; and

 

(f)
reimbursement for any out-of-pocket expenses related to identifying, investigating and consummating
an initial Business Combination, provided that no proceeds of the Offering placed in the Trust Account may be applied to the payment
of such expenses prior to the consummation of an initial Business Combination.

 

11. Each
of the undersigned acknowledges and understands that the Underwriters and the Company will rely upon the agreements,
representations, and warranties set forth herein in proceeding with the Offering.

 

12.
Each of the undersigned authorizes any employer, financial institution, or consumer credit
reporting agency to release to the Underwriters and their legal representatives or agents (including any investigative search firm retained
by the Underwriters) any information they may have about such undersigned party’s background and finances (“Information”),
purely for the purposes of performing required due diligence examinations in connection with the Offering (provided that the Underwriters
agree to hold such Information in confidence). Each of the undersigned agrees that neither the Underwriters nor their agents shall be
violating such undersigned party’s right of privacy by requesting and obtaining the Information in accordance with this Section
12.

 

    5

     

    

 

13. Each
of the undersigned acknowledges and agrees that the Company will not consummate any initial Business Combination that involves a
company which is affiliated with such undersigned party unless the Company obtains an opinion from an independent investment banking
firm that is a member of the Financial Industry Regulatory Authority that the Business Combination is fair to the Company’s
stockholders from a financial perspective.

 

14.
Each officer and director signatory hereto represents and warrants that he or she has full
right and power, without violating any agreement to which such person is bound (including, without limitation, any non-competition or
non-solicitation agreement with any employer or former employer), to enter into this Letter Agreement and to serve as an officer of the
Company or as a director on the Board, as applicable, and hereby consents to being named in the Prospectus as an officer and/or as a
director of the Company, as applicable.

 

15.
As used in this Letter Agreement, (i) “Business Combination” shall mean a merger, capital stock exchange,
asset acquisition, stock purchase, reorganization or similar Business Combination, involving the Company and one or more businesses;
(ii) “Founder Shares” shall mean the 12,030,833 shares of Class B common stock of the Company, par value $0.0001
per share, acquired by the Sponsor and the other Initial Holders for an aggregate purchase price of $25,000 prior to the consummation
of the Offering; (iii) “Initial Holders” shall mean FTAC Zeus Sponsor, LLC and FTAC Zeus Advisors, LLC; (iii)
“Offering Shares” shall mean the shares of Common Stock included in the units sold in the Offering; (iv) “Placement
Shares” shall mean the shares of Common Stock sold as part of the Placement Units; (v) “Placement Warrants”
shall mean the Warrants to purchase up to an aggregate of 796,250 shares of the Common Stock that are included in the Placement Units;
(vi) “Placement Units” shall mean the aggregate of 1,525,000 Units (or up to 1,592,500 Units if the Underwriters
exercise their overallotment option in full) of the Company (each Placement Unit consists of one-half of a Placement Warrant and one
Placement Share) sold in the Private Placement for an aggregate purchase price of $15,250,000 (or $15,925,000 if the Underwriters exercise
their overallotment option in full); (vii) “Trust Account” shall mean the trust account into which net proceeds
of the Offering and the Private Placement will be deposited; (viii) “Prospectus” shall mean the prospectus
included in the registration statement filed by the Company in connection with the Offering, as supplemented or amended from time to
time; (ix) “Private Placement” shall mean that certain private placement transaction occurring simultaneously
with the closing of the Offering pursuant to which the Company has agreed to sell an aggregate of 1,525,000 Placement Units (or up to
1,592,500 Placement Units if the Underwriters exercise their overallotment option in full) to FTAC Zeus Sponsor, LLC, a Delaware limited
liability company; (x) “Sponsor” shall mean, collectively, FTAC Zeus Sponsor, LLC, a Delaware limited liability
company, and FTAC Zeus Advisors, LLC, a Delaware limited liability company, (xi) “Insiders” shall mean the
Sponsor, any holders of Founder Shares, any person who receives Placement Units, Founder Shares or their respective underlying securities
as a Permitted Transferee and each officer and director of the Company; and (y) references to completion of the Offering shall exclude
any exercise of the Underwriters’ over-allotment option.

 

16. This
Letter Agreement constitutes the entire agreement and understanding of the parties hereto in respect of the subject matter hereof
and supersedes all prior understandings, agreements, or representations by or among the parties hereto, written or oral, to the
extent they relate in any way to the subject matter hereof or the transactions contemplated hereby. This Letter Agreement may not be
changed, amended, modified or waived (other than to correct a typographical error) as to any particular provision, except by a
written instrument executed by the parties hereto.

 

17. No
party may assign either this Letter Agreement or any of its rights, interests, or obligations hereunder without the prior written
consent of the other party. Any purported assignment in violation of this paragraph shall be void and ineffectual and
shall not operate to transfer or assign any interest or title to the purported assignee. This Letter Agreement shall be binding on
each undersigned party and each of such undersigned party’s, as applicable, heirs, personal representatives, successors and
assigns.

 

18.
This Letter Agreement shall be governed by and construed and enforced in accordance with
the laws of the State of New York applicable to contracts entered into within the borders of such state and without giving effect to
conflicts of law principles that would result in the application of the substantive laws of another jurisdiction. The parties (i) agree
that any action, proceeding, claim or dispute arising out of, or relating in any way to, this Letter Agreement shall be brought and enforced
in the federal or state courts in the borough of Manhattan in the City of New York, and irrevocably submits to such jurisdiction and
venue, which jurisdiction and venue shall be exclusive and (ii) waive any objection to such exclusive jurisdiction and venue or that
such courts represent an inconvenient forum.

 

    6

     

    

 

19.
Any notice, consent or request to be given in connection with any of the terms or provisions
of this Letter Agreement shall be in writing and shall be sent by express mail or similar private courier service, by certified mail
(return receipt requested), by hand delivery, electronic or facsimile transmission.

 

20. This Letter Agreement shall terminate
in the event that the Offering is not completed by March 31, 2022; and, provided, further, that paragraph 5 of this Letter Agreement
shall survive any liquidation of the Company.

 

[Signature
page follows]

 

    7

     

    

 

	 	Sincerely,
	 	 
	 	FTAC
ZEUS ACQUISITION CORP.

a Delaware corporation

	 	 
	 	By:	 
	 	Name:	Ryan
    M. Gilbert
	 	Title:	President
    and Chief Executive Officer

 

 

	 	FTAC
ZEUS SPONSOR, LLC,

a Delaware limited liability company

	 	 
	 	By:	 
	 	Name:	Daniel
    G. Cohen
	 	Title:	Manager

 

 

	 	FTAC
ZEUS ADVISORS, LLC,

a Delaware limited liability company

	 	 
	 	By:	 
	 	Name:	Daniel
    G. Cohen
	 	Title:	Manager

 

 

[Signature
Page to Letter Agreement]

 

    8

     

    

 

	 	 
	 	Daniel
    G. Cohen, individually
	 	 
	 	 
	 	Ryan
    M. Gilbert, individually
	 	 
	 	 
	 	Joseph
    W. Pooler, Jr., individually
	 	 
	 	 
	 	Rochael
    Adranly, individually
	 	 
	 	 
	 	Lynn
    C. Eisenhart, individually
	 	 
	 	 
	 	Steven
    Lefkovits, individually
	 	 
	 	 
	 	Volker
    Berl, individually

 

 

[Signature
Page to Letter Agreement]

 

    9Exhibit 10.8

 

SECOND AMENDMENT TO PROMISSORY NOTE

 

THIS SECOND AMENDMENT TO PROMISSORY NOTE (the “Amendment”)
is dated as of the 28th day of October, 2021 and is made by and between FTAC Zeus Acquisition Corp. (the “Maker”) and
FTAC Zeus Sponsor, LLC (the “Payee”).

 

RECITALS

 

		A.	Maker executed that certain Promissory Note dated February 12, 2021 in the principal sum of up to Three Hundred Thousand dollars ($300,000),
as amended by that certain First Amendment to Promissory Note dated June 23, 2021 (collectively, the “Note”).

 

		B.	The Note, as amended, matured on September 30, 2021.

 

		C.	Maker and Payee have agreed to make certain amendments to the Note.

 

		D.	Unless otherwise set forth herein, all other provisions of the Note shall remain in full force and effect.

 

		E.	All capitalized terms not defined in this Amendment will have the meanings given to them in the Note.

 

In consideration of these promises, the mutual covenants contained
in this Amendment and other good and valuable consideration, the receipt and sufficiency of which are acknowledged, the parties agree
as follows:

 

1. Section 1 of the Note
is hereby amended and restated in its entirety to read as follows:

 

“Principal. The principal balance
of this Note shall be repayable on the earlier of: (a) the date on which Maker consummates its initial public offering (“IPO”)
and (b) March 31, 2022 (such earlier date, the “Maturity Date”).”

 

[SIGNATURES APPEAR
ON FOLLOWING PAGE]

 

     

     

    

 

IN WITNESS WHEREOF, the parties
have caused this Amendment to be duly executed as of the date first above written.

 

		MAKER:
		 	
		FTAC ZEUS ACQUISITION CORP.
		 	
		By:	/s/ Joseph Pooler,
    Jr.
		Name:	Joseph Pooler, Jr.
		Title:	Chief Financial Officer
		 	
		PAYEE:
		 	
		FTAC ZEUS SPONSOR, LLC
		 	
		By:	/s/ Ryan Gilbert
		Name:	Ryan Gilbert
		Title: 	Manager

 

Signature page to Second Amendment to Promissory
Note

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00335-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00335-of-00352.parquet"}]]