Exhibit 32.1

CERTIFICATIONS OF PRINCIPAL EXECUTIVE OFFICER AND PRINCIPAL 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 M. Cain, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report on Form 10-Q of Couchbase, Inc. for the period ended October 31, 2023 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and that the information contained in such Quarterly Report on Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of Couchbase, Inc.

Date: December 7, 2023	By:	/s/ MATTHEW M. CAIN
	Name:	Matthew M. Cain
	Title:	Chair, President and Chief Executive Officer
		(Principal Executive Officer)

I, Greg Henry, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report on Form 10-Q of Couchbase, Inc. for the period ended October 31, 2023 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and that the information contained in such Quarterly Report on Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of Couchbase, Inc.

Date: December 7, 2023	By:	/s/ GREG HENRY
	Name:	Greg Henry
	Title:	Senior Vice President and Chief Financial Officer
		(Principal Financial Officer)