Multifactor
Multifactor is a YC Fall 2025 (F25) company. Based in San Francisco, CA, USA. Team of 2.
About Multifactor
Summary
Multifactor builds zero-trust authentication, authorization, and auditing infrastructure for AI agents and multi-agent systems. It lets enterprises grant agents access to online accounts with fine-grained permissions, instant revocation, and cryptographically signed audit trails, replacing the ad-hoc credential sharing and password managers that leave agentic workflows exposed. The primary buyers are enterprise security teams, particularly CISOs, who need verifiable, auditable control over what AI agents can do inside connected accounts.
Business model
A free tier plus paid enterprise access.
Go-to-market
Enterprise security and IT teams adopt Multifactor through a self-serve free tier, with direct sales to large enterprises running complex agentic deployments such as supply chain operations.
From the Y Combinator listing
Zero-trust authentication, authorization, and auditing for AI agents
The agentic era is here, but its foundation is dangerously insecure. A growing number of high-profile "AI agent gone rogue" security incidents make headlines each week. As enterprise adoption of agentic software has far outpaced the development of applicable cybersecurity solutions, CISOs have loudly voiced a growing need for verifiable, fine-grained security controls on complex multi-agent systems. That's why we built Multifactor. Multifactor offers best-in-class authentication, authorization, and auditing technologies for agentic systems, allowing users to securely and revocably share online accounts with agents while maintaining fine-grained permissions and a detailed event history. We are doing for AI security what Cloudflare did for web security, Okta did for identity security, and Wiz did for cloud security: defining the category. A world-class "account manager" that allows agents to securely use online accounts on your behalf is just the start—our early enterprise partners include companies using AI agents to manage $7.5+ billion manufacturing supply chains, where the consequences for lapses in security are severe. Our patented AI security technology seamlessly integrates with existing agentic software to thwart attacks like prompt injection, so CISOs and end users alike can breathe a sigh of relief, without slowing the pace of AI adoption.
Facts
- B2B / B2B -> Security
- San Francisco, CA, USA
- 2
- Active
- Early
Founders (1)
- Vivek Nair
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