Defence technology has become one of the hottest corners of venture capital. Defence-tech startups raised a record $49.1 billion in 2025, nearly double the previous year, driven by battlefield validation in Ukraine, rising global defence budgets and a wave of investors reframing the sector around dual-use innovation. For a founder building autonomy, ISR, secure communications or advanced manufacturing, the fastest route into this market often runs through a defence accelerator: a structured programme that pairs funding with mentorship, government access and a path past the procurement “valley of death.”
The challenge is that the right defence accelerator depends heavily on where you operate, what stage you are at and which government you want to sell to. Below are eight of the best programmes active in 2026, with what each offers, who it suits and terms where they are public, so you can shortlist the ones worth applying to.
1. NATO DIANA: the alliance’s flagship defence accelerator
The Defence Innovation Accelerator for the North Atlantic (DIANA) is NATO’s flagship deep-tech programme and arguably the most ambitious defence accelerator in the Western alliance. For its 2026 cohort, DIANA received 3,680 applications and selected 150 companies from 24 NATO countries, its largest intake ever.
What it offers: Each company receives €100,000 in non-dilutive funding, with top performers eligible for up to €300,000 in a second phase, plus access to more than 16 accelerator sites and over 200 test centres across the 32 NATO nations.
Focus: Ten challenge areas spanning advanced communications, autonomy and unmanned systems, energy and power, biotech and human resilience, and critical infrastructure.
Who it’s for: Dual-use deep-tech startups in NATO member states that want non-dilutive capital and credibility with allied militaries.
2. AFWERX: the U.S. Air Force defence accelerator
AFWERX is the innovation arm of the U.S. Air Force and the largest military innovation accelerator in existence, having awarded roughly 10,400 SBIR/STTR contracts worth more than $7.24 billion. It operates three arms: AFVentures for investment, Spark for talent and networking, and Prime for accelerated development.
What it offers: Non-dilutive contract funding, introductions to Air Force and Space Force end-users, and STRATFI/TACFI bridge funding to help companies cross from prototype to production.
Focus: Aerospace, autonomy and any dual-use technology with an Air Force application.
Who it’s for: U.S. small businesses and non-traditional vendors targeting the Department of Defense. The federal SBIR/STTR programme briefly lapsed when its authorization expired on 30 September 2025, but Congress reauthorized both programmes for five years in March 2026 (the House passed the bill on 17 March 2026), so new solicitations are open again.
3. Starburst Aerospace
Starburst is a global aerospace and defence accelerator combining startup programmes, strategy consulting and venture investment, with offices from Los Angeles and Washington DC to Paris, Munich, Singapore and Tel Aviv, and a portfolio of around 150 startups.
What it offers: Cohort-based acceleration including its ASTRA programme, direct interactions with defence and intelligence agencies, mentorship from technical experts, and pitch access to industry funders. In 2025 it expanded with the National Landing Launchpad near the Pentagon and the SEISMIC programme for innovators at Minority Serving Institutions.
Focus: Aerospace, propulsion, autonomy, space technology and dual-use defence systems.
Who it’s for: Aerospace and defence founders who want a globally networked partner with strong primes and government relationships.
4. Techstars Space Accelerator
Run in partnership with the United States Space Force and NASA’s Jet Propulsion Laboratory, the Techstars Space Accelerator is one of the most established programmes bridging commercial startups into the aerospace and defence market.
What it offers: A 13-week in-person programme in Los Angeles plus the standard Techstars investment. As of the autumn 2025 batch, Techstars revised its terms to $220,000: a $20,000 investment for 5% common stock and a $200,000 uncapped MFN post-money SAFE. For how Techstars compares with the other marquee program, see Techstars vs Y Combinator compared.
Focus: Next-generation space technology, autonomy and robotics from adjacent industries seeking aerospace as a go-to-market channel. The 2026 cohort opens applications on 2 March and begins on 14 September.
Who it’s for: Early-stage founders comfortable trading equity for hands-on mentorship and a direct line into Space Force and JPL.
5. National Security Innovation Network (Hacking for Defense)
The National Security Innovation Network (NSIN) is a U.S. Department of Defense programme that connects universities and the venture community to national-security problems. Its best-known offering, Hacking for Defense (H4D), is a university course powered by BMNT and the Common Mission Project.
What it offers: A 10–16 week structured curriculum that pairs interdisciplinary teams with real DoD problem sponsors, plus follow-on commercialization support; NSIN has awarded startup grants such as $50,000 for early commercialization.
Focus: Problem-driven national-security innovation across roughly 50 partner universities nationwide.
Who it’s for: Student founders, academics and early-stage teams who want to validate a defence problem before committing to a full company.
6. Decisive Point
Decisive Point is a venture firm and accelerator founded in 2018 that invests in critical technologies for defence, energy and infrastructure. In 2025 it deepened its national-security bench, adding Medal of Honor recipient Matthew Williams as a partner.
What it offers: An accelerator model built around government-adoption pathways rather than generic programming, leaning on relationships with stakeholders and deep-tech ecosystem leaders including The Engine at MIT, Techstars and Newlab.
Focus: Autonomy, kinetic systems, ISR, space, energy systems and AI-enabled command and control.
Who it’s for: Early- and growth-stage founders who want a capital partner with deep government-contracting expertise.
7. Shield Capital
Shield Capital invests at the intersection of national security and commercial technology, backing early-stage companies and helping them navigate the complexity of selling to the DoD while scaling in commercial markets.
What it offers: Early-stage investment plus hands-on support navigating defence procurement, with a dual-use thesis designed to de-risk the long government sales cycle.
Focus: Artificial intelligence, autonomy, cybersecurity and space. Portfolio companies include Albedo, which builds very-low-Earth-orbit satellites for ultra-high-resolution imagery.
Who it’s for: Dual-use founders who want a specialist investor rather than a fixed-length cohort, and who can build for both commercial and defence customers.
8. DIU Defense Innovation OnRamp Hubs
The Defense Innovation Unit (DIU) fields commercial technology for the U.S. military, and its OnRamp Hubs create regional on-ramps for non-traditional vendors. The network is expanding fast, with hubs in Arizona, Hawaii, Kansas, Ohio and Washington, and new sites added in Kentucky, Minnesota and Montana for 2026.
What it offers: Transition services including technology-readiness evaluations, cyber hardening, adversarial-capital screening and authority-to-operate support, plus accelerator tracks such as the four-month Defense Tech Accelerator Challenge that offered participation funding and tailored DoD engagement.
Focus: Any commercial or dual-use technology that can move from prototype to operational use, typically targeting a sub-two-year timeline.
Who it’s for: U.S.-based founders who want regional access to DoD buyers without relocating to Washington.
How to choose the right defence accelerator
There is no single best defence accelerator; there is only the best fit for your stage, geography and customer. Start with jurisdiction: NATO DIANA suits founders across the alliance, while AFWERX, NSIN and DIU are U.S.-centric and often require domestic incorporation. Next, weigh dilution: government programmes like DIANA and AFWERX provide non-dilutive funding, whereas Techstars and venture-led accelerators such as Decisive Point and Shield Capital take equity in exchange for capital and a deeper investor relationship. For a breakdown of typical check sizes and the equity these programs take, see how much accelerators invest and what they take. Finally, match the focus area, propulsion and space founders gravitate to Starburst and Techstars, while problem-discovery teams may start with Hacking for Defense.
It is also worth remembering that not every relevant programme brands itself as defence-only. Broad deep-tech accelerators can be a strong fit for dual-use founders. Elev X!, the Palo Alto accelerator run by NEC X, is a deep-tech programme rather than a pure-play defence one, but its 220+ alumni include national-security-adjacent companies such as Multitude Insights, an intelligence-focused startup. Elev X! invests $250K via a SAFE for up to 11% equity across a 9–12 month programme structured in three milestone phases, and spans eight focus areas, an option worth weighing if your technology straddles defence and commercial markets. Apply to Elev X! Ignite.
Whichever route you choose, apply early, tailor your pitch to the programme’s specific challenge areas, and treat the accelerator less as a funding event and more as your entry point into a procurement system that rewards persistence.
Sources
Fundraise Insider — Recently Funded Defense & Spacetech Startups
NATO — DIANA 2026 Cohort Announcement
AFWERX
Starburst Aerospace
Techstars Space Accelerator
Techstars — Investment Terms Update
Defense Innovation Unit
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