TL;DR: Alter is a Y Combinator Summer 2025 startup Secure access control and authorization platform for agent workflows, currently active with a team of 2.
Secure access control and authorization platform for agent workflows
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Alter is a zero-trust identity and access control platform purpose-built for AI agents. It wraps every tool call in strong authentication, fine-grained authorization, and real-time guardrails, so agents can move fast without breaking things. Each request is verified at the parameter level, authorized against granular policies, executed with least-privilege access, and fully audited in real time. Unsafe actions, whether it’s a rogue DROP TABLE or a payment above policy limits, are blocked before they touch production. Behind the scenes, Alter manages credentials, issuing ephemeral, scope-narrowed access for every interaction, then rotating or expiring it in seconds. The result: no long-lived secrets, no blind spots, and no surprises in audit. With Alter, teams can move fast on AI agent ini…
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Yes. Alter was funded by Y Combinator in the Summer 2025 batch. Secure access control and authorization platform for agent workflows
Alter is a zero-trust identity and access control platform purpose-built for AI agents. It wraps every tool call in strong authentication, fine-grained authorization, and real-time guardrails, so agents can move fast without breaking things. Each request is verified at the parameter level, authorized against granular…
Alter was part of Y Combinator's Summer 2025 batch.
Alter has a team of 2 people according to Y Combinator's directory.
Alter is currently listed as Active with a team of 2 in Y Combinator's directory.
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