QuickLinks -- Click here to rapidly navigate through this document

Exhibit 10.8


REGISTRATION RIGHTS AGREEMENT

        This Registration Rights Agreement (this "Agreement") is entered into effective as of June 8, 2007, by and between PROS Holdings, Inc., a Delaware corporation (the "Company"), Ronald F. Woestemeyer ("Mr. Woestemeyer") and Mariette M. Woestemeyer ("Mrs. Woestemeyer" and together with Mr. Woestemeyer, the "Stockholders", and each individually a "Stockholder").


WITNESSETH

        WHEREAS, the Company and the Stockholders have entered into that certain Mutual Release and Settlement Agreement, dated December 31, 1998 (the "Mutual Release");

        WHEREAS, the Stockholders hold shares of common stock, par value $0.001 per share, of the Company ("Common Stock") and warrants exercisable for Common Stock;

        WHEREAS, the Company and certain investors of the Company contemplated granting the Stockholders piggyback registration rights with respect to the Common Stock currently held and herein after acquired by the Stockholders (the "Shares") in connection with the Mutual Release; and

        WHEREAS, the parties now desire to enter into this Agreement to provide for such registration rights in respect of the Shares.


AGREEMENT

        NOW, THEREFORE, in consideration of the premises and the mutual covenants and conditions herein contained, the parties do hereby agree as follows.

        1.    Registration Rights.    The parties covenant and agree as follows:

        "Act" means the Securities Act of 1933, as amended.

        "Register", "registered" and "registration" refer to a registration effected by preparing, and filing a registration statement or similar document in compliance with the Act and applicable rules and regulations thereunder, and the declaration or ordering of effectiveness by the SEC of such registration statement or document.

        "SEC" means the Securities and Exchange Commission.


2


3


        2.    Notices.    All notices, requests, consents, and other communications under this Agreement shall be in writing and shall be delivered by hand, or mailed by first class certified or registered mail, return receipt requested, postage prepaid, to the Company and the Stockholders at their respective addresses set forth below:

    If to the Company:   PROS Holdings, Inc.
3100 Main Street, Suite #900
Houston, TX 77002
Attention: President

 

 

with a copy to (which shall not constitute notice):

 

 

 

 

DLA Piper US LLP
1221 S. MoPac Expressway
Suite 400
Austin, TX 78746-7650
Attention: John J. Gilluly III

 

 

If to the Stockholders:

 

Mr. Ronald F. Woestemeyer
3980 Inverness Dr.
Houston, TX 77019

 

 

 

 

Mrs. Mariette M. Woestemeyer
3980 Inverness Dr.
Houston, TX 77019

Any party may change its address for purposes hereof by notice to the other party in the manner provided above.

4



        3.    Amendments and Waivers.    Except as otherwise provided in this Agreement, the terms and provisions of this Agreement may not be modified or amended except in a writing executed by the Company and both of the Stockholders. No waivers of or exceptions to any term, condition or provision of this Agreement, in any one or more instances, shall be deemed to be, or construed as, a further or continuing waiver of any such term, condition or provision.

        4.    Entire Agreement.    With respect to the subject matter hereof, this Agreement embodies the entire agreement and understanding between the Stockholders and the Company.

        5.    Counterparts.    This Agreement maybe executed in several counterparts, each of which shall be deemed in original, but all of which together shall constitute one and the same instrument.

        6.    Headings.    The headings of the sections, subsections and paragraphs of this Agreement have been added for convenience only and shall not bc deemed to be a part of this Agreement.

        7.    Severability.    Any provision of this Agreement which is invalid or unenforceable in any jurisdiction shall be ineffective to the extent of such invalidity or unenforceability without invalidating or rendering unenforceable the remaining provisions of this Agreement, and, to the extent permitted by law, any determination of invalidity or unenforceability in any jurisdiction shall not invalidate or render unenforceable such provision in any other jurisdiction.

        8.    Assignment.    Neither this Agreement nor any of the rights or obligations of any Stockholder or the Company provided herein may be assigned, sold, pledged, hypothecated or otherwise transferred by any Stockholder without the prior written consent of the Company. This Agreement shall inure to the benefit of and be binding upon the respective heirs, personal representatives, successors and permitted assigns of the parties.

        9.    Governing Law.    This Agreement shall be governed by and construed in accordance with the laws of the State of Delaware without reference to its principles of conflicts of law.


[Remainder of Page Intentionally Left Blank]

5


        IN WITNESS WHEREOF, the undersigned have hereunto set their hands as of the day and year first above written.

    COMPANY:

 

 

PROS HOLDINGS, INC.

 

 

By:

/s/  
CHARLES H. MURPHY      
    Name: Charles H. Murphy
    Title: Chief Financial Officer

 

 

STOCKHOLDERS:

 

 

/s/  
RONALD F. WOESTEMEYER      
Ronald F. Woestemeyer

 

 

/s/  
MARIETTE M. WOESTEMEYER      
Mariette M. Woestemeyer


Signature Page to Woestemeyer Registration Rights Agreement




QuickLinks

REGISTRATION RIGHTS AGREEMENT
WITNESSETH
AGREEMENT
[Remainder of Page Intentionally Left Blank]
Signature Page to Woestemeyer Registration Rights Agreement