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Defiant

Venture Capital

London-based early-stage venture fund investing in cybersecurity and developer tools startups with deep technical conviction.

London, United Kingdom · 2+ investments · 3 portfolio companies

Seed
Early Stage
Cybersecurity
Developer Tools
SaaS
Headquarters
London, United Kingdom
Website
defiant.vc
AUM
$30.0M
Portfolio Companies
3
Total Investments
2
Last Investment
May 2026
Geographic Focus
Europe, United Kingdom

Investment Thesis

Backs technical founders building cybersecurity and developer tool companies at seed and Series A stages.

Defiant is a Venture Capital firm based in London, United Kingdom. It has made 2 investments, including Rivia.AI, Blitzy and Rivia. Focus areas include Cybersecurity and Developer Tools.

Portfolio3

Co-investors18

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18 co-investors across 22 shared portfolio companies — who they back alongside, and how often they lead.

Venture Capital ×14 · Growth Equity ×1 · Individual ×1 · 9 shared rounds

Investment History

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