Exhibit 32.1

CERTIFICATION 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, Graham V. Smith, 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 Splunk Inc. on Form 10-K for the fiscal year ended January 31, 2022 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Annual Report on Form 10-K fairly presents, in all material respects, the financial condition and results of operations of Splunk Inc.

Date: March 24, 2022

/s/ Graham V. Smith

Graham V. Smith

Interim Chief Executive Officer, Chair and Director

(Principal Executive Officer)

I, Jason E. Child, 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 Splunk Inc. on Form 10-K for the fiscal year ended January 31, 2022 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Annual Report on Form 10-K fairly presents, in all material respects, the financial condition and results of operations of Splunk Inc.

Date: March 24, 2022

/s/ Jason E. Child

Jason E. Child

Senior Vice President and Chief Financial Officer

(Principal Financial Officer)