Exhibit 32.1

CERTIFICATIONS 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, Theresa Condor, 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 Spire Global, Inc. for the fiscal quarter ended September 30, 2025 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 Spire Global, Inc.

Date: December 17, 2025 |  | By: | /s/ Theresa Condor
|  | Name: | Theresa Condor
|  | Title: | President, Chief Executive Officer and Director (Principal Executive Officer)

I, Alison Engel, 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 Spire Global, Inc. for the fiscal quarter ended September 30, 2025 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 Spire Global, Inc.

Date: December 17, 2025 |  | By: | /s/ Alison Engel
|  | Name: | Alison Engel
|  | Title: | Chief Financial Officer (Principal Financial Officer)