RunSybil Raises $40M to Let AI Hack Your Apps Before Criminals Do

RunSybil just pulled in $40M in funding led by Khosla Ventures. The cybersecurity startup builds AI agents that continuously and autonomously hack live applications — finding and documenting vulnerabilities before the bad guys do.

Think of it as a tireless digital pen tester that never sleeps, never takes a coffee break, and never stops probing your software for weaknesses. The company's AI runs persistent penetration testing against production apps, automatically flagging security holes as it discovers them.

It's a compelling pitch. Traditional pen testing is expensive, slow, and typically happens on a schedule. RunSybil wants to make it continuous and autonomous. With $40M in the bank and Khosla's backing, the startup is betting that AI-driven security testing is about to become the default — not the exception.