If seed was about proving you could build something real and get a first buyer to pay for it, Series A is about proving you can operate at scale — multiple countries, formal compliance, and contracts that survive budget cycles. Here's what that actually looks like.
The market you're raising into
Late-stage defence investment in Europe tripled in 2025. The overall DSR category hit $8.7B and the bulk of the growth is now happening at Series A and beyond, not early stage.
Who's writing the cheques: Series A rounds typically mix specialist defence funds, generalist growth VCs, and sovereign/strategic investors. US funds and strategics increasingly join at this stage accounting for 40–50% of late-stage European defence capital in some 2025 datasets. Your pitch needs to work for both audiences.
The round: what Series A looks like
Valuation at Series A in defence is fundamentally different from SaaS. Investors are underwriting the total contract value of your signed and probable pipeline, your technology risk at current TRL, and your ability to win the next programme. A company with €2M ARR and a €40M multi-year framework agreement looks very different from one with €2M ARR and a handful of small pilots.
Backlog is the real metric. Signed contracts, framework agreements, and shortlisted tenders are sometimes multiple times current annual revenue — and that's what Series A investors are actually valuing. If your backlog doesn't substantially exceed your annual revenue, you have a thin story.
Team & organisational maturity
Seed tolerated a lean founding team with strong domain access. Series A does not. Investors expect an organisation that can manage programmes, not just build technology.
- 20–80 FTEs — robust engineering, field deployment, and BD staff operating across multiple countries
- Dedicated government programmes lead — someone with direct experience managing large defence-prime and ministry relationships, not just a BD generalist
- Formal security and compliance processes — clearances where required, robust infosec policies, no "we'll figure it out" answers on classification
- Board with senior ex-officers or officials — not decorative; they're expected to actively open doors and validate doctrine alignment
- Programme management capability — the ability to deliver on multi-year contracts on time, on spec, under scrutiny
Governance gap is a Series A killer. Given the sensitivity of technologies and customers, investors at this stage do real due diligence on your governance frameworks. Weak compliance posture relative to what your product does is not a "fix it post-raise" situation — it's a dealbreaker.
Product & technical maturity
You need fielded systems with operational validation with actual deployment to successfully raise a Series A round.
TRL expectations at Series A
Software-centric plays (AI, C2, logistics, cyber)
- Integration with national systems or NATO/EU networks — not proof-of-concept integration, actual production deployment
- Demonstrated ability to operate at required classification levels and under contested or degraded conditions
- Live operational track record, not just exercise performance
Hardware & autonomy (drones, robotics, sensing)
- At least one system in limited operational deployment with a user unit — validated by operators, not just engineers
- TRL 7–8: system prototype demonstrated in operational environment, near pre-series production for hardware components
- Clear path to series production — supply chain mapped, manufacturing partnerships in place or advanced
Contracts & revenue: the real traction signals
At Series A the question shifts from "can you get a buyer?" to "can you win programmes?" One paid pilot that never converted is a warning sign, not a proof point.
- At least one multi-year programme or framework agreement — with a defence ministry, NATO, or major security agency; this is the hard minimum, not a nice-to-have
- Several smaller contracts or pilots across at least two NATO/EU countries or major agencies as geographic concentration is increasingly considered a red flag
- Dual-use commercial revenue in adjacent markets (critical-infrastructure monitoring, border security, cyber for enterprises) — provides near-term cash flow and reduces pure procurement dependency
- Contracted backlog substantially exceeding annual revenue — this is what investors use to model the upside
Investor mix & what they each care about
Series A defence rounds attract a coalition — and each constituency reads your deck differently.
- Specialist defence funds (NATO Innovation Fund, dedicated defence VCs) — focused on capability alignment, TRL trajectory, and procurement pathway
- Generalist growth VCs — looking for dual-use commercial revenue, unit economics on the commercial side, and management team quality
- Sovereign/strategic investors (Bpifrance, SmartCap, national vehicles) — care about national interest alignment, domestic supply chain, and export-control positioning
- US growth funds and strategics — increasingly present at Series A; focus on scalability, transatlantic market access, and exit optionality via US defence primes
Red flags that will kill your Series A
- Over-dependence on a single national customer — concentration risk is the first thing due diligence surfaces
- Pilots that haven't converted to programmes — a string of pilots with no full-scale follow-on signals you can't close
- Misalignment with evolving EU/NATO capability priorities — if your product doesn't map to current doctrine gaps, the procurement path is unclear
- Weak governance and compliance relative to technology sensitivity — this kills deals in final diligence
- No path to series production for hardware plays — investors won't fund perpetual prototype mode
- Revenue entirely from defence with no dual-use diversification — pure defence-only at venture scale is a structural risk
Series A readiness: quick benchmark
| Signal | Competitive at Series A | Red zone |
|---|---|---|
| TRL | 7–8; limited operational deployment | Still at prototype / TRL 5–6 |
| Annual revenue | €1–10M recognised | <€500K with no backlog story |
| Contracts | 1+ multi-year programme or framework agreement | Pilots only; no programme conversions |
| Contract value (TCV) | Low–mid €10Ms over programme life | Sub-€1M total contracted value |
| Geographic spread | 2+ NATO/EU countries or agencies | Single national customer |
| Backlog vs revenue | Backlog substantially exceeds annual revenue | Backlog ≈ or below annual revenue |
| Team | 20–80 FTEs; gov programmes lead; compliance in place | Sub-20, no BD, no formal compliance |
| Dual-use revenue | Growing commercial adjacent revenues | 100% defence-only, no commercial path |
| Typical round | €10–30M equity · contract-driven valuation · mix of specialist + generalist + sovereign investors | |
The Series A ask in one sentence: Show investors you've moved to programme-capable company with the contracts, TRL, team depth, and geographic spread to prove it. Everything else is secondary.
Browse funds actively backing European defence and dual-use startups.
