POWER OF ATTORNEY

    Know by all these presents that the undersigned hereby constitutes and appoints each of James B. DeBello, Jeffrey Davison, Jason L. Gray, Michael Lieburn, and Trevor Renfield signing singly, the undersigned's true and lawful attorney-in-fact to:

(1)    execute for and on behalf of the undersigned, in the undersigned's capacity as an officer and/or director of Mitek Systems, Inc. (the "Company"), Forms 3, 4 and 5 in accordance with Section 16(a) of the Securities Exchange Act of 1934, as amended and the rules thereunder*;

(2)    do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4 or 5 and timely file such form with the United States Securities and Exchange Commission and any stock exchange or similar authority; and

(3)    take any other action of any type whatsoever in connection with the forgoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to the Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.

    The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all in intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted.  The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with Section 16 of the Securities Exchange Act of 1934, as amended.

    This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned's holdings and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

    IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 19th day of September 2017.


/s/ Jane J. Thompson
Jane J. Thompson

*An insider of an issuer that is registering equity securities for the first time under Section 12 of the Exchange Act must file a Form 3 no later than the effective date of the registration statement. If the issuer is already registered under Section 12, the insider must file a Form 3 within ten days of becoming an officer, director, or beneficial owner.

Changes in ownership are reported on Form 4 and must be reported to the SEC within two business days.

Insiders must file a Form 5 to report any transactions that should have been reported earlier on a Form 4 or were eligible for deferred reporting. If a Form must be filed, it is due 45 days after the end of the company's fiscal year.