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Join Capital

Seed venture capital firm

Join Capital is a Seed venture capital firm that typically writes $1M–$5M checks in Defence, Space and Quantum Computing. DryPowder has no SEC Form D on file for Join Capital as of June 3, 2026.

Updated · Sources: fund website

Check if you match Join Capital
Typical check
$1M–$5M
Stages
Seed

Overview

Join Capital at a glance

Stage
Seed
Check size
$1M–$5M
Sectors
Defence, Space, Quantum Computing, Cybersecurity, Advanced Materials, Autonomous Systems
Cold inbound
Warm intro preferred
Website
join.capital

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.

Stated on join.capitalWEBSITE

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

DryPowder has tracked these recent investments from Join Capital: ISPTech, enclaive and Kreios Space.

What the portfolio shows

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Portfolio 4

Backed: ISPTech, enclaive, Kreios Space + 1 more

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Partners

Partners at Join Capital

Team data is not yet available for Join Capital. Visit the website

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Investor lists that include Join Capital

Seed investorsSeed Cybersecurity investorsCybersecurity investors

FAQ

Questions about Join Capital

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.

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 an overlapping stage and sector focus include RRE Ventures, Amadeus Capital Partners, Caffeinated Capital.

How do I reach Join Capital?

Join Capital does not generally take cold inbound; a warm introduction from a founder or investor the firm knows is the usual path.

Sources

Updated