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Exhibit 10.17

THIRD AMENDMENT TO CREDIT AGREEMENT

        THIS THIRD AMENDMENT TO CREDIT AGREEMENT (this "Amendment") is entered
into as of September    , 2002 to be effective as of July 31, 2002, between
CARREKER CORPORATION, a Delaware corporation ("Borrower"), each of the banks or
other lending institutions which is a signatory to this Amendment (collectively,
"Lenders"), and J.P. MORGAN CHASE BANK (formerly known as The Chase Manhattan
Bank), individually as a Lender and Issuing Bank and as Administrative Agent (in
such capacity, together with its successors and assigns, "Administrative
Agent"), and COMPASS BANK, as Syndication Agent.

R E C I T A L S

        A.    Borrower, Administrative Agent, Syndication Agent, and Lenders are
parties to the Credit Agreement, dated June 6, 2001 (as renewed, extended,
modified, and amended from time to time, the "Credit Agreement"), providing for
a line of credit and a letter of credit facility to Borrower by the Lenders
therein.

        B.    Borrower has requested an amendment to the Credit Agreement to
delete all provisions and requirements relating to the Borrowing Base, including
without limitation all provisions defining the Borrowing Base, relating to the
calculation of the Borrowing Base, requiring the reporting of the Borrowing Base
and the submission of Borrowing Base Certificates, and prepayment of the
amounts, if any, by which Aggregate Revolving Credit Exposure exceeds the
Borrowing Base.

        C.    Borrower, the Administrative Agent, the Syndication Agent, and
Required Lenders now desire to amend the Credit Agreement as requested by
Borrower.

        NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, Borrower, Administrative Agent,
Syndication Agent, and Required Lenders agree as follows:

        1.    TERMS AND REFERENCES.    Unless otherwise stated in this document
(a) terms defined in the Credit Agreement have the same meanings when used in
this document and (b) references to "Sections," "Schedules," and "Exhibits" are
to the Credit Agreement's sections, schedules, and exhibits.

        2.    AMENDMENTS.    The Credit Agreement is hereby amended as follows:

        (a)  Section 1.01 is amended to delete the following definitions in
their entirety, so that there will be no definition of the terms "Available
Amount", "Borrowing Base", "Borrowing Base Certificate," or "Eligible
Receivables" in the Agreement.

        (b)  Section 2.01 is amended in its entirety as follows:

        SECTION 2.01  Commitments. (a) Subject to the terms and conditions set
forth herein, each Lender agrees to make Loans to the Borrower from time to time
during the Availability Period in an aggregate principal amount that will not
result in (i) such Lender's Revolving Credit Exposure exceeding such Lender's
Commitment, or (ii) the Aggregate Revolving Credit Exposure exceeding the
aggregate amount of all Lenders' Commitments. Within the foregoing limits and
subject to the terms and conditions set forth herein, the Borrower may borrow,
prepay and reborrow Loans.

        (c)  Section 2.08(c) is deleted in its entirety and Section 2.08(d) is
renumbered as 2.08(c).

        (d)  Section 6.01 is amended to delete subsection 6.01(d) and to
designate the existing subsections (e) through (i) as subsections  (d) through
(h).

        (e)  Exhibit I is deleted in its entirety.

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3.    AMENDMENT OF CREDIT AGREEMENT AND OTHER LOAN DOCUMENTS.

        (a)  All references in the Loan Documents to the Credit Agreement shall
henceforth include references to the Credit Agreement as modified and amended by
this Amendment, and as may, from time to time, be further modified, amended,
restated, extended, renewed, and/or increased.

        (b)  Any and all of the terms and provisions of the Loan Documents are
hereby amended and modified wherever necessary, even though not specifically
addressed herein, so as to conform to the amendments and modifications set forth
herein.

4.CONDITIONS PRECEDENT. Notwithstanding any contrary provision herein, the
amendments described in Paragraph 2 above are not effective unless and until:

        (a)  the representations and warranties in this Amendment, the Credit
Agreement, and all other Loan Documents are true and correct in all material
respects; and

        (b)  Administrative Agent shall have received counterparts of this
Amendment executed by Borrower and all Lenders on the signature page or pages of
this document.

        5.    RATIFICATIONS.    Borrower (a) ratifies and confirms all
provisions of the Loan Documents as amended by this Amendment, (b) ratifies and
confirms that all guaranties, assurances, and liens granted, conveyed, or
assigned to the Administrative Agent for the benefit of the Lenders under the
Loan Documents are not released, reduced, or otherwise adversely affected by
this Amendment and continue to guarantee, assure, and secure full payment and
performance of the present and future Obligation, and (c) agrees to perform such
acts and duly authorize, execute, acknowledge, deliver, file, and record such
additional documents and certificates as Administrative Agent may reasonably
request in order to create, perfect, preserve, and protect those guaranties,
assurances, and liens.

        6.    REPRESENTATIONS.    Borrower represents and warrants to the
Administrative Agent and Lenders that as of the date of this Amendment: (a) this
Amendment has been duly authorized, executed, and delivered by Borrower; (b) no
action of, or filing with, any Governmental Authority is required to authorize,
or is otherwise required in connection with, the execution, delivery, and
performance by Borrower of this Amendment; (c) the Loan Documents, as amended by
this Amendment, are valid and binding upon Borrower and are enforceable against
Borrower in accordance with their respective terms, except as limited by
bankruptcy, insolvency, fraudulent conveyance, moratorium, reorganization, or
other similar laws affecting creditors' rights generally, and general principles
of equity; (d) the execution, delivery, and performance by Borrower of this
Amendment do not require the consent of any other Person and do not and will not
constitute a violation of its certificate of incorporation, bylaws, or order of
any Governmental Authority, or material agreements to which Borrower is a party
or by which Borrower is bound; (e) all representations and warranties in the
Loan Documents are true and correct in all material respects on and as of the
date of this Amendment, except to the extent that (i) any of them speak to a
different specific date, or (ii) the facts on which any of them were based have
been changed by transactions contemplated or permitted by the Credit Agreement;
and (f) both before and after giving effect to this Amendment, no Default
exists.

        7.    MISCELLANEOUS.    Unless stated otherwise (a) the singular number
includes the plural and vice versa and words of any gender include each other
gender, in each case, as appropriate, (b) headings and captions may not be
construed in interpreting provisions, (c) this Amendment shall be construed, and
its performance enforced, under Texas law, (d) if any part of this Amendment is
for any reason found to be unenforceable, all other portions of it nevertheless
remain enforceable, and (e) this Amendment may be executed in any number of
counterparts with the same effect as if all signatories had signed the same
document, and all of those counterparts must be construed together to constitute
the same document.

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        8.    ENTIRETIES.    The Credit Agreement and the other Loan Documents,
as amended by this Amendment, represent the final agreement between the parties
about the subject matter of the Credit Agreement and may not be contradicted by
evidence of prior, contemporaneous, or subsequent oral agreements of the
parties. There are no unwritten oral agreements between the parties.

[Remainder of Page Intentionally Left Blank; Signature Pages to Follow]

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Signature Page to Third Amendment to Credit Agreement,

Dated as of September 13, 2002, but effective as of July 31, 2002
amending Credit Agreement, dated June 6, 2001,
by and among Carreker Corporation, as Borrower,
J.P. Morgan Chase Bank, as Administrative Agent,
and the Lenders named on Schedule 2.01 thereto

  CARREKER CORPORATION
 
By:
 
/s/  JOHN D. CARREKER, JR.      

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John D. Carreker, Jr.
Chief Executive Officer
 
J.P. MORGAN CHASE BANK, individually as a
Lender and Issuing Bank and as Administrative
Agent
 
By:
 
/s/  MAE REEVES      

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Mae Reeves
Vice President
 
COMPASS BANK,
Individually as a Lender
and as Syndication Agent
 
By:
 
/s/  R. BRUCE FREY      

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R. Bruce Frey
Vice President

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Signature Page to Third Amendment to Credit Agreement,

Dated as of September 13, 2002, but effective as of July 31, 2002,
amending Credit Agreement, dated June 6, 2001,
by and among Carreker Corporation, as Borrower,
J.P. Morgan Chase Bank, as Administrative Agent,
and the Lenders named on Schedule 2.01 thereto

  FIRSTAR BANK, N.A.
 
By:
 
/s/  JOSEPH L. SOOTER      

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Name: Joseph L. Sooter
Title: Vice President
 
WELLS FARGO BANK TEXAS,
NATIONAL ASSOCIATION
 
By:
 
       

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  Name:          

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  Title:          

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CONSENT OF GUARANTOR

        To induce Lenders to enter into this Amendment, the undersigned
(a) consents and agrees to execution and delivery of the Amendment, (b) ratifies
and confirms that all guaranties, assurances, and Liens granted, conveyed, or
assigned to Lender under the Loan Documents are not released, diminished,
impaired, reduced, or otherwise adversely affected by this Amendment and
continue to guarantee, assure, and secure the full payment and performance of
all present and future Obligation, (c) that any liens and security interests in
any collateral created under the Loan Documents secure, among other
indebtedness, Borrower's obligations under the Credit Agreement, as amended by
the Amendment, (d) all liabilities and obligations guaranteed by the undersigned
pursuant to any guaranty executed by the undersigned include, without
limitation, the indebtedness evidenced by the Credit Agreement, as amended by
the Amendment, (e) agrees to perform such acts and duly authorize, execute,
acknowledge, deliver, file, and record such additional guaranties, assignments,
security agreements, deeds of trust, mortgages, and other agreements, documents,
instruments, and certificates as Administrative Agent may reasonably deem
necessary or appropriate in order to create, perfect, preserve, and protect
those guaranties, assurances, and Liens, (f) represents and warrants to
Administrative Agent and the Lenders that (i) the value of the consideration
received and to be received by the undersigned in respect of those guaranties,
assurances, and Liens are reasonably worth at least as much as the liability and
obligation of the undersigned thereunder, (ii) the liability and obligation may
reasonably be expected to directly or indirectly benefit the undersigned, and
(iii) the undersigned is and after giving effect to those guaranties,
assurances, Liens, and the Loan Documents, in light of all existing facts and
circumstances (including, without limitation, collateral for and other obligors
in respect of the Obligation and various components of it and various rights of
subrogation and contribution), will be solvent, and (g) waives notice of
acceptance of this consent and agreement, which consent and agreement binds the
undersigned and its successors and permitted assigns and inures to Lenders and
their successors and permitted assigns.

        Executed September 13, 2002, but effective as of July 31, 2002.

  CARREKER CHECK SOLUTIONS, LLC,
A Delaware limited liability company
 
By:
 
/s/  JOHN D. CARREKER, JR.      

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John D. Carreker, Jr.
President and Chief Executive Officer

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QuickLinks

THIRD AMENDMENT TO CREDIT AGREEMENT
R E C I T A L S
Signature Page to Third Amendment to Credit Agreement,
Signature Page to Third Amendment to Credit Agreement,
CONSENT OF GUARANTOR