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CyLon

Accelerator

Est. 2015, London-based. Europe's leading pure-play cybersecurity accelerator & pre-seed investor. 13-week programme (2x yearly) + mentorship, office, investor/buyer network access. 80+ companies accelerated, £400m+ portfolio value (as of 2022), 8+ exits incl. Tessian, Keyless, Aimbrain. Co-founders: Grace Cassy (diplomatic service), Jonathan Luff, Alex van Someren. 1-10 person team. Anchored by national security expertise & deep CISO networks. Dual model: accelerator (£15k investment, 3% equity) + independent seed VC cheques.

Check Size
£15K - £150K

Investment Focus

Investment Thesis

Pure-play cybersecurity accelerator & pre-seed investor. £15k-150k cheques via accelerator (£15k at 3% equity) + seed VC follow-ons. Only cyber/resilience. Global sourcing (UK, US, Israel focus) but portfolio work incl. FTSE 100, governments. Team: nat'l security + enterprise founders expertise. Not a traditional VC fund; uses own capital for founder alignment. Avoids: non-security, later-stage rounds. Strong exits track: Tessian (Proofpoint acq.), Immersive Labs ($75m S.C.), Mondoo ($15m S.A.).

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