Our Defiant Tones

We invest in Late Seed & Series A B2B software & fintech businesses within Europe and the broader world. Able to lead, co-lead or follow, with $2-10m investments.

Our investment criteria:

1. Live product in market, generating revenue
2. Emerging or established signs of PMF
3. Early signs of a repeatable growth engine
4. European focus, but invest globally

Current Portfolio

2026 Series A

Rivia
Vertical AI for clinical trial data. On a mission to fix broken data infrastructure within clinical trials. Investing alongside Earlybird, Speedinvest and Amino Collective.
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2026 Seed

Announcing May
AI Native CRM
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2026 Series A

Announcing May
Enterprise Agentic Coding
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Prior companies we’ve supported

Includes both investments made and companies supported by the Defiant team in their prior roles.