Cyber London (CyLon)

Overview

CyLon was launched in 2014 by serial entrepreneurs Paddy Harker and Todd O'Boyle, who identified a gap in Europe for a focused early-stage program tailored to cybersecurity founders. The accelerator operates two cohorts per year, each running for 13 weeks from its Oxford base, offering mentorship from industry practitioners — former CISOs, intelligence veterans, and venture partners. The firm's model is equity-based: it takes a standard stake in exchange for £20,000 in seed capital. The accelerator targets pre-seed and seed-stage companies building in cyber defense, infrastructure security, enterprise compliance, and adjacent AI/ML applications. CyLon does not maintain a conventional asset-class mix—it is a programmatic investor, not a fund manager, and does not deploy later-stage capital or hold SPVs. Its portfolio spans roughly two dozen countries globally, with a heavy concentration in the UK, Israel, and the Baltics. Confirmed alumni include SOC.OS, a UK-based security operations platform, and CyberOwl, a maritime cyber monitoring firm. CyLon operates with a lean, expert-led team; headcount has typically stayed under ten core staff, supplemented by a network of mentors and guest speakers. The firm has no disclosed AUM and does not raise institutional capital for the program itself. No recent operational events (within the last 24 months) have been formally disclosed; the latest confirmed cohort was the Spring 2024 intake, which included six startups from the UK and Europe. What sets CyLon apart structurally is its pure programmatic model — it does not manage a fund, take carried interest, or follow-on invest from a dedicated vehicle. It is best understood as a sector-specific foundry for founders, not an asset manager. That makes it distinct from a venture capital firm or family office: CyLon's return comes from portfolio exits and follow-on rounds, which are then recycled back into future cohorts.