Exhibit 23.1

INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM’S CONSENT

We consent to the inclusion in this Registration Statement of Khosla Ventures Acquisition Co. IV (the “Company”) Amendment No. 2 to Form S-1 (File No. 333-253378) of our report dated February 22, 2021, which includes an explanatory paragraph as to the Company’s ability to continue as a going concern, with respect to our audit of the financial statements of Khosla Ventures Acquisition Co. IV as of February 12, 2021 and for the period from February 10, 2021 (inception) through February 12, 2021, which report appears in the Prospectus, which is part of this Registration Statement. We also consent to the reference to our Firm under the heading “Experts” in such Prospectus.

/s/ Marcum LLP

Marcum LLP

New York, NY

August 4, 2021