Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-254783, 333-256038, and 333-263761 on Form S-8 of our report dated March 7, 2023, relating to the financial statements of ThredUp Inc. appearing in this Annual Report on Form 10-K for the year ended December 31, 2022.

/s/ DELOITTE & TOUCHE LLP

San Francisco, California

March 7, 2023