Exhibit 32.1

CERTIFICATIONS OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Matthew Stecker, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Annual Report of Evolving Systems, Inc. on Form 10-K/A for the annual period ended December 31, 2021 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that the information contained in such Form 10-K/A fairly presents, in all material respects, the financial condition and results of operations of Evolving Systems, Inc.

/s/ Matthew Stecker

Matthew Stecker

Chairman and Chief Executive Officer

April 13, 2022

I, Mark P. Szynkowski, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Annual Report of Evolving Systems, Inc. on Form 10-K/A for the annual period ended December 31, 2021 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that the information contained in such Form 10-K/A fairly presents, in all material respects, the financial condition and results of operations of Evolving Systems, Inc.

/s/ Mark P. Szynkowski

Mark P. Szynkowski

Senior Vice President of Finance and Secretary

(Principal Financial and Accounting Officer)

April 13, 2022

This certification is furnished with this Annual Report on Form 10-K/A pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by such Act, be deemed filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Such certification will not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except to the extent that we specifically incorporate it by reference.