Join Capital
Invest early in foundational deep tech that solves the world's toughest problems across defence, space, quantum computing, AI/cybersecurity, and advanced materials—companies that can lead, scale, and last.
Check Size$1M – $5M
StagesSeed
LocationEurope
Data quality59good
Investment thesis
Invest early in foundational deep tech that solves the world's toughest problems across defence, space, quantum computing, AI/cybersecurity, and advanced materials—companies that can lead, scale, and last.
90 confidence · stated by fund
What sets Join Capital apart
- Dual-use technology focus with government co-investment partners (EIB, NATO Innovation Fund)
- European deep tech specialization
- Strategic infrastructure thesis
Recent investments
ISPTech, enclaive, Kreios Space
Investment profile
- Stages
- Seed
- Sectors
- Defence, Space, Quantum computing, Cybersecurity, Advanced materials, Autonomous systems
- Cold inbound
- Warm intro preferred
Frequently asked questions
- What does Join Capital invest in?
- Join Capital is a seed stage Defence, Space, Quantum computing, Cybersecurity, Advanced materials, Autonomous systems investor, typically writing $1M – $5M checks, primarily investing in Europe. Their thesis: Invest early in foundational deep tech that solves the world's toughest problems across defence, space, quantum computing, AI/cybersecurity, and advanced materials—companies that can lead, scale, and last.
- What check size does Join Capital write?
- Join Capital typically writes $1M – $5M checks at the Seed stage in Defence, Space, Quantum computing, Cybersecurity, Advanced materials, Autonomous systems.
- Is Join Capital actively deploying capital?
- Join Capital is actively deploying capital. What we observed: EIB €50M commitment to Fund III announced March 2026; recent seed investments in ISPTech, enclaive, Kreios Space through February-September 2025.
- What makes Join Capital different from other funds?
- Join Capital stands out on 3 points: Dual-use technology focus with government co-investment partners (EIB, NATO Innovation Fund); European deep tech specialization; Strategic infrastructure thesis.
- What has Join Capital invested in recently?
- Recent investments DryPowder has tracked from Join Capital include ISPTech, enclaive, Kreios Space.
- What other funds are similar to Join Capital?
- Funds with overlapping stage and sector focus include Sequoia Capital, Caffeinated Capital. See the full list below, or use DryPowder's AI fund matching to rank all tracked funds by fit with your specific startup.
- How do I reach out to Join Capital?
- Join Capital doesn't generally take cold inbound — a warm introduction from a founder or investor they already know is the reliable path in. Use DryPowder's AI fund matching to see how your startup aligns with Join Capital's thesis and focus areas (Defence, Space, Quantum computing, Cybersecurity, Advanced materials, Autonomous systems) — it returns a fit score and specific talking points for your outreach.