TechFlow News, March 18: According to Fortune, AI cybersecurity startup RunSybil has raised $40 million in a funding round led by Khosla Ventures. Participating investors include S32, Anthropic’s Anthology Fund, Menlo Ventures, Conviction, and Elad Gil. Angel investors include Nikesh Arora, Amit Agarwal, Jeff Dean, and numerous founders and executives from OpenAI, Palo Alto Networks, Stripe, and Google. The company has not disclosed the valuation for this round.
RunSybil was co-founded in 2023 by Ari Herbert-Voss—the first security researcher at OpenAI—and Vlad Ionescu, former Head of Offensive Security Red Teaming at Meta. Its flagship product is the AI agent Sybil, which continuously and autonomously conducts penetration testing on live applications, identifying, exploiting, and documenting real security vulnerabilities without human intervention. RunSybil’s current customers include startups such as Cursor, Turbopuffer, Notion, Baseten, and Thinking Machines Lab, as well as several major financial institutions and Fortune 500 companies.
