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Alter

Alter

Secure access control and authorization platform for agent workflows.

Operating headquarters

New York, NY, US🇺🇸

Accelerator

Y Combinator S25

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.

Alter - Products & Services

Alter Vault
Alter Vault gives AI agents per-agent identities with keys traceable to a person and scoped delegation.
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Alter - Quick Facts

Who are Alter's competitors?

Companies similar to Alter include Baselayer, Multifactor, Agentic Fabriq and Clawvisor.

Where is Alter's headquarters located?

Alter's headquarters is located in New York, NY, US.

When was Alter's last funding round?

Alter's most recent funding round was for $500k (USD) in June 2025.

How much has Alter raised to-date?

As of Jun 1, 2025, Alter has raised a total of $500k (USD).