Alter is a secure access control and authorization platform for agent workflows. It implements zero-trust identity controls, parameter-level authorization, and real-time guardrails for AI agents running in production. The platform helps teams safely deploy autonomous agents with enforced permissions. Alter was part of Y Combinator's Summer 2025 batch and is based in New York.
Alter
ActiveSecure access control and authorization platform for agent workflows
Total raised
$500K
1 round
Stage
Seed
Jan 2025
Team
1-10
since 2025
Pricing
—
Founded
2025
New York, United States
Agent-ready
—
Access control and authorization platform for AI agent workflows
Zero-trust identity controls for autonomous agents
Parameter-level authorization for fine-grained permissions
Real-time guardrails for agents running in production
Enforced permissions for safe agent deployment
Designed for production-grade agent security
New York-based team
Y Combinator (Summer 2025) backing
12/100
Early
MCP server
Public API
Webhooks
OAuth 2.0
SDKs
No public agent surfaces detected yet.
Jan 2025 Seed $500K ● Y Combinator
Capital network
$500K raised ·1 backer·10 network links
- Backers1
- Shared portfoliocompanies these backers also fund
- Extended networkfunds that co-invest alongside them
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- What is Alter?
- Alter is a secure access control and authorization platform for AI agent workflows, providing zero-trust identity controls and real-time guardrails for production agents.
- What kind of controls does Alter offer?
- It provides zero-trust identity controls, parameter-level authorization, and real-time guardrails to enforce agent permissions.
- Who is Alter for?
- It is built for teams deploying autonomous AI agents in production who need to enforce permissions and contain agent behavior.
- Is Alter backed by an accelerator?
- Yes, Alter was part of Y Combinator's Summer 2025 batch and is based in New York.
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