Defense & Space accelerator application deadlines

Application windows for defense and space programs, including SBIR and STTR solicitation cycles and equity accelerators, dated where published.

Vertical

Terms

12 dated windows, 3 rolling

Confirmed Expected (typically) Rolling

September 2026

FedTech (Startup Studios & Accelerators)Defense & Space
Closes Sep 13, 2026Crucible Accelerator Fall 2026 (virtual, October through December 2026)Source
AFWERX SBIR/STTR Open TopicDefense & Space
Closes Sep 23, 2026DAF SBIR/STTR solicitation 26.BZ Release 5 (STTR 26.TZ Release 5)Source
SpaceWERX (SBIR/STTR, STRATFI/TACFI, Accelerate)Defense & Space
Closes Sep 23, 2026DAF SBIR/STTR solicitation 26.BZ Release 5 (STTR 26.TZ Release 5)Source

Windows that have closed in the last 12 months, most recent first.

SOFWERXDefense & Space
Closes Aug 19, 2026SBIR 26.BZ Release 4 (as listed on sofwerx.org)Source
AFWERX SBIR/STTR Open TopicDefense & Space
Closes Aug 18, 2026DAF SBIR/STTR solicitation Release 4 (listed as 26.BX on AFWERX Get Funded page)Source
SpaceWERX (SBIR/STTR, STRATFI/TACFI, Accelerate)Defense & Space
Closes Aug 18, 2026DAF SBIR/STTR solicitation Release 4 (listed as 26.BX on Get Funded pages)Source
Army xTech Prize CompetitionsDefense & Space
Closes Jul 24, 2026xTech Apex Intercept Phase 1 white paper submissionsSource
SpaceWERX (SBIR/STTR, STRATFI/TACFI, Accelerate)Defense & Space
Closes Jul 22, 2026DAF SBIR/STTR solicitation 26.BZ Release 3Source
AFWERX SBIR/STTR Open TopicDefense & Space
Closes Jul 22, 2026DAF SBIR/STTR solicitation 26.BZ Release 3Source
Catalyst Accelerator (Catalyst Space Accelerator)Defense & Space
Confirmed window, date pendingBMC3I TAP Lab Phase 1 (six-week Focus Area Cohort Team experience)Source
FedTech (Startup Studios & Accelerators)Defense & Space
Closes Jun 26, 2026DOE Boost 2026 startup studio (18 weeks, with Sandia National Laboratories)Source
Techstars Space AcceleratorDefense & Space
Closes Jun 10, 20262026 cohort (Sep 8 to Dec 10, 2026)Source

These review applications on an ongoing basis, with no fixed window.