How Defense Tech Startups Get Funded

Defense technology has gone from a category most venture funds avoided to one many are actively hunting. Capital is available in a way it was not a decade ago.

What has not changed is the underlying difficulty: your customer is a government that buys on multi-year budget cycles, through contracting mechanisms designed for large incumbents, subject to rules about who may own you. A company can win prototype contracts continuously and still never reach the recurring revenue that makes it a business.

That gap — between a successful demonstration and a funded programme with budget behind it — is where most defense startups fail. This guide covers the funding stack, the constraints on your cap table, and what investors actually underwrite.

1. The Structural Problem

Three features shape everything.

• Budgets are appropriated years in advance. A capability the government wants today may have no funding line until a future budget cycle. Enthusiasm from an end user does not equal money.
• Prototype money is plentiful; production money is scarce. There are many routes to a few hundred thousand or a few million dollars for a demonstration. There are far fewer to a recurring programme.
• The buyer, the user and the budget holder are usually three different people. An operator who loves your system, a contracting officer who must run a competition, and a programme executive who controls the money all have to align.

The practical consequence: optimise for a path to recurring budget, not for contract count. Investors have learned to ask about this specifically.

2. The Non-Dilutive Stack

SBIR and STTR

The Department of Defense is the largest participant in the programme by volume. Topic-driven — agencies publish problems and you propose solutions.

The critical feature for defense specifically is Phase III sole-source authority. Work deriving from your SBIR can be contracted directly, without competition, by any agency — which is a genuine and durable competitive advantage, and frequently worth more than the award money. Full detail in our guide to SBIR and STTR grants, including the 2026 reauthorisation through 2031 and its tightened foreign-risk screening.

Bridge and matching programmes

Several DoD components run programmes specifically designed to cross the gap between a Phase II prototype and a programme of record — typically requiring matching funds from a programme office, a prime, or private investors. These are the most strategically valuable awards available, because they require a government sponsor to commit their own money, which is exactly the signal that a real customer exists.

Other Transaction Agreements (OTAs)

A contracting mechanism outside the standard federal acquisition regulations, designed for prototype projects and follow-on production. Faster, more flexible, more commercially familiar terms, and — importantly — an OTA prototype can convert to a follow-on production agreement without recompeting.

Frequently accessed through consortia, which is worth understanding early because membership is a prerequisite for many opportunities.

Innovation units and commercial solutions openings

Organisations such as the Defense Innovation Unit and the service-level innovation arms exist specifically to bring commercial technology in quickly, using solicitation processes closer to a commercial procurement than a traditional one. Timelines measured in months rather than years.

Other routes

• Rapid capability offices and urgent operational needs processes
• Research funding from service laboratories and the advanced research agencies
• Allied and partner-nation programmes, and NATO-affiliated innovation funds
• Prize competitions and challenges
• R&D tax credits, which apply squarely to this work

3. Equity Capital

• Defense and national security specialist funds. A real category now, with partners who understand procurement, security clearance and export control. Worth far more than generalist capital at the same price.
• Deep tech and frontier funds comfortable with hardware and long cycles.
• Generalist venture funds, many of which have entered the category. Be prepared to educate them on why a $2 million contract is not $2 million of ARR.
• Strategic and government-adjacent investors, including non-profit strategic investment organisations that invest on behalf of government agencies and bring introductions that are difficult to obtain otherwise.
• Corporate venture arms of the primes, which bring integration paths and potential acquisition. Watch for exclusivity and rights of first refusal — they reduce competitive tension at exit.
• Sovereign and allied capital, which carries the ownership complications discussed below.

Note that some LP agreements restrict investment in weapons-related categories. A fund's appetite may be limited by its own investors rather than by its view of you — the kind of structural constraint explained in our guide to how funds work.

4. Your Cap Table Is a National Security Question

This is the section that most distinguishes defense from every other sector, and founders discover it far too late.

Foreign ownership, control or influence

Companies performing classified work must be assessed for foreign ownership, control or influence. Foreign investors on your cap table — including limited partners in funds that invest in you — can require mitigation arrangements, or can make a facility clearance unobtainable.

Mitigation is possible through board resolutions, proxy arrangements or special security agreements, but each adds cost, governance complexity and time. Ask every prospective investor about their own LP base if classified work is in your future. A fund with substantial foreign sovereign money in it is a different proposition from one without.

Export controls

ITAR governs defense articles and services; the EAR governs dual-use items. The consequences for a startup are concrete and immediate:

• Who can work on your product. Sharing controlled technical data with a foreign national, even one employed by you in the United States, can be a deemed export requiring authorisation.
• Where you can host and store data.
• Who you can sell to, and what licences are required.
• Registration obligations for manufacturers and exporters of defense articles.

Violations carry serious penalties. Get a classification analysis for your product early — whether it is controlled, and under which regime — because it shapes hiring, infrastructure and go-to-market.

Clearances and cybersecurity

Facility and personnel clearances take time and cannot be rushed. Separately, contractors handling controlled unclassified information face cybersecurity certification requirements now phasing into contracts, with the required level depending on the information involved. This is a real cost that should be budgeted before it becomes a bid disqualifier.

Investment screening

Foreign investment into companies with critical technology can be subject to national security review, in some cases mandatory. A foreign investor in your round may trigger a filing — factor the timeline into your closing schedule rather than discovering it at signature.

5. Working Capital: The Underestimated Problem

Government contracting creates cash flow patterns that surprise founders.

• Cost-reimbursement contracts pay in arrears. You spend, invoice, and wait. The gap is yours to fund.
• Payment timelines are slow, and slower through a prime as subcontractor.
• Approved accounting systems. Certain contract types require an accounting system that can segregate and report costs to government standards — a real requirement your accounting provider must be able to support.
• Budget disruptions. Continuing resolutions and shutdowns delay awards and payments through no fault of yours. The 2025 SBIR authorisation lapse is a recent illustration of how completely external events can stop the money.

Do not fund this gap with equity. Government receivables are high-quality collateral — the payer is the United States government — and are precisely what receivables financing exists for. Our guide to private credit covers the structures.

6. What Investors Underwrite

• A named path to a programme of record. Which programme, which office, which budget line, which fiscal year. Vagueness here is the single biggest reason defense companies fail to raise.
• Contract vehicle access. Do you hold vehicles, consortium memberships or Phase III authority that let a customer buy quickly?
• Whether a government sponsor has committed their own money. A matched award is worth far more as a signal than an unmatched one.
• Dual-use potential. A commercial market alongside the government one de-risks the whole company — which is why the strongest positioning in this sector is usually genuinely dual-use rather than defense-only.
• Compliance posture — export control classification, clearance status, cybersecurity certification, accounting system.
• Manufacturing and supply chain. Hardware means capital intensity, lead times, and sourcing rules restricting where components may originate.
• Team credibility with the customer. People who have operated the mission, and people who have sold into it.

7. Working With Primes

The large prime contractors are simultaneously your route to market, your competitor and your likely acquirer.

As a subcontractor you get access to programmes you could not win directly, at the cost of margin, direct customer relationship and control. Watch for exclusivity, restrictive teaming agreements, and terms giving the prime rights to your technology.

As an acquisition target you are competing against their internal build decision. Companies that hold Phase III authority, a differentiated position on a real programme and their own customer relationships negotiate from strength.

The practical guidance: partner where it opens a door you cannot open alone, retain the direct customer relationship wherever possible, and read the intellectual property terms with particular care — the data rights and licence provisions in a teaming agreement can quietly transfer the value of your company.

Frequently Asked Questions

Can we raise venture capital on government revenue alone?

Yes, but investors discount it relative to commercial recurring revenue. Contract revenue is lumpy, competed and non-recurring until you reach a programme of record. Show the path from contracts to a durable budget line, or show a commercial market alongside.

Should we take foreign investment?

Be extremely careful. It can complicate or prevent clearance eligibility, trigger investment screening, and constrain which contracts you can pursue. If classified or controlled work is anywhere in your plan, take specialist advice before accepting foreign capital — including from funds with foreign LPs.

Is dual-use better than defense-only?

Generally yes, for fundability. A commercial market gives you revenue that does not depend on appropriations, widens your investor universe, and improves exit options. The risk is building a product that serves neither market well because it is designed for both.

How long does a first contract take?

An SBIR Phase I can be won within months of a solicitation. A programme of record is typically years away. Plan runway accordingly, and treat any timeline given by an enthusiastic end user as optimistic — they do not control the budget.

What about export controls on our software?

Software can absolutely be controlled, and the analysis depends on function and specification rather than on whether it is hardware. Get a classification opinion before you hire internationally or deploy to a cloud region outside the United States — both are common and expensive mistakes.

The Bottom Line

Defense is now a fundable category, but the capital follows a specific pattern: non-dilutive money for prototypes, equity to bridge to production, and receivables financing for the working capital gap.

Name the programme and the budget line. Get a government sponsor to commit their own money. Understand your export control position and your cap table's ownership profile before either becomes a constraint you cannot unwind.

Global Capital Network connects defense and dual-use founders with investors across our network and events. Get in touch.

This article is general information, not legal advice. Export control, clearance and foreign investment rules are technical and carry serious penalties. Engage specialist counsel.