EXHIBIT 23.01

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the registration statements (Nos. 333-117928, 333-125584, 333-176579, 333-176580, 333-196530, 333-227000, 333-248228, 333-266669) on Form S-8 of our reports dated February 17, 2023, with respect to the consolidated financial statements of CSG Systems International, Inc. and the effectiveness of internal control over financial reporting.

 

/s/ KPMG LLP

Omaha, Nebraska

February 17, 2023