Darktrace

Darktrace's platform learns what normal behavior looks like for every user and device on a network, so it can flag genuinely novel threats instead of just matching known attack signatures. Its Autonomous Response technology can interrupt an attack in seconds without a human in the loop, which matters most in the exact moment an attack is moving too fast for a security team to react manually. Thoma Bravo took the company private in a 2024 acquisition, ending its run as a publicly listed company on the London Stock Exchange.