QuickLinks -- Click here to rapidly navigate through this document
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, Godfrey R. Sullivan, 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, 2013 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: April 1, 2013
| | |
| | /s/ GODFREY R. SULLIVAN
Godfrey R. Sullivan Chairman, President and Chief Executive Officer (Principal Executive Officer) |
I, David F. Conte, 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, 2013 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: April 1, 2013
| | |
| | /s/ DAVID F. CONTE
David F. Conte Chief Financial Officer (Principal Financial and Accounting Officer) |
QuickLinks
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