John Brennan works hands-on with cybersecurity founders from before they even have a concrete idea through their A-round, helping with research, strategy, and daily pipeline work rather than just providing capital. He manages a network of 120+ cybersecurity experts that he uses systematically to give founders targeted customer insights, and he evaluates founding teams based on whether he'd be excited to meet with them weekly for 5-10 years as a key investment criterion.
About their Fund
YL Ventures
Sectors
Cybersecurity, Enterprise, AI, SaaS, Devtools
Rounds
Seed - Series B+
Avg Check Size
$100K - $5M
Notable Investments
YL Ventures is a seed-only cybersecurity fund that makes only a handful of concentrated investments per fund and maintains a formal network of 100+ CISOs from Fortune 100 companies who actively help portfolio companies find customers and shape products from day one. The firm operates as an Israel-US bridge, systematically connecting Israeli technical founding teams with U.S. enterprise buyers and global capital, with partners who are former CISOs running hands-on go-to-market programs rather than just providing financial investment.
Notable Fund
Investments
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