What Riverbank does
Riverbank is building an AI-native offensive security and red-teaming company. Founded by a team with backgrounds at the NSA and Department of Defense, it applies AI to offensive security testing, targeting the penetration-testing market. The company was founded in 2025, is based in San Francisco, and is part of Y Combinator's S25 batch.
Key capabilities
Riverbank focuses on AI-native red teaming and offensive security, using AI to drive penetration testing and offensive operations rather than relying solely on manual, human-led engagements. By combining national-security offensive expertise with AI automation, it aims to make adversarial security testing more scalable across the pentesting market it cites as roughly $3 billion.
Who it's for
Riverbank serves organizations that need offensive security testing and red teaming to find vulnerabilities before adversaries do. Its positioning as an AI-native offensive team targets buyers who want continuous, AI-driven adversarial testing built by practitioners with deep offensive security experience.