TL;DR: Antigen is a Y Combinator Fall 2025 startup Continuous offensive security for the enterprise., currently active with a team of 3.
Continuous offensive security for the enterprise.
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Antigen is an AI adversary for the enterprise. It maps, exploits, and secures your attack surface through nightly automated offensive testing and monthly human red team assessments. Every finding is delivered with traces, reproduction steps, and remediation directly in GitHub, Linear, or the Antigen Platform. We work with companies in financial services, healthcare, retail, and government where security is trust. We're backed by Lightspeed, DST Global, and Susa Ventures.
Yes. Antigen was funded by Y Combinator in the Fall 2025 batch. Continuous offensive security for the enterprise.
Antigen is an AI adversary for the enterprise. It maps, exploits, and secures your attack surface through nightly automated offensive testing and monthly human red team assessments. Every finding is delivered with traces, reproduction steps, and remediation directly in GitHub, Linear, or the Antigen Platform. We work…
Antigen was part of Y Combinator's Fall 2025 batch.
Antigen has a team of 3 people according to Y Combinator's directory.
Antigen is currently listed as Active with a team of 3 in Y Combinator's directory.
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