Multifactor

YC F25 · Active · Zero-trust authentication, authorization, and auditing for AI agents

Competitors

Companies closest to Multifactor
Company	Category	Status	Program
AlterShared: fine grained, authorization, authenticationActiveAI, Devtools	AI, Devtools	Active	YCS25
Sublime BlackShared: security incidentInactiveAI	AI	Inactive	YCW19
Jenesys AIShared: agentic eraNot statedAI	AI	Not stated	Antler2022
RivetShared: agentic eraNot statedAI, Devtools	AI, Devtools	Not stated	speedrunSR002

Adjacent

Companies next to Multifactor
Company	Category	Status	Program
ClawvisorShared: authorization, rogue, agentActiveAI	AI	Active	YCX26
HiroShared: security, agentActiveAI, Devtools	AI, Devtools	Active	YCS23
SlashAuthShared: fine grained, controlInactiveDevtools	Devtools	Inactive	YCW21
RiotShared: growing, cybersecurityActiveOther	Other	Active	YCW20
Ambient.aiShared: security incident, enterpriseActiveAI	AI	Active	YCW17

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Founders

Vivek NairFounder/CEO

About Multifactor

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.

YC batch: F25 · Fall 2025
Status, per YC: Active
Category: AI
Team size: 6
Location: San Francisco, CA, USA
Founded: 2025
Checked: 4h ago

Multifactor in F25: 146 companies, 89% AI

Multifactor: questions

Which YC batch was Multifactor in?

Multifactor was in Y Combinator's Fall 2025 batch (F25).

Is Multifactor still active?

Y Combinator lists Multifactor as active.

Who founded Multifactor?

Multifactor's founders, as listed on its YC page: Vivek Nair (Founder/CEO).

Where is Multifactor based?

Multifactor lists San Francisco, CA, USA as its location on YC's directory.

Sources: each program's public company list, read twice a week. Not affiliated with Y Combinator or any other program. Logos via logo.dev; trademarks belong to their owners.