MentionFox
Home › funding signals › Multifactor
Accelerator · announced

Multifactor (YC F25) — Zero-trust authentication, authorization, and auditing for AI agents

Multifactor appears in Y Combinator's company directory in the Fall 2025 batch, listed 2025-09-19. Zero-trust authentication, authorization, and auditing for AI agents.

Just raised? Share it.

Multifactor: Accepted into Y Combinator Fall 2025

What do you want to do with Multifactor?

Multifactor

New accelerator entry · 2025-09-19 · the record

Fall 2025
batch
6
people
Early
stage
United States of America
region
Open the record →

In their words

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.

What the record says

BatchFall 2025
Announced2025-09-19
StageEarly
StatusActive
Team size6
IndustryB2B
Sub-industryB2B -> Security
RegionsUnited States of America, America / Canada
BasedSan Francisco, CA, USA
HiringNo
Sitehttps://multifactor.com

The full profile

Checking your access…

Is this you?

If you're behind Multifactor: acceptance into a YC batch is one of the few weeks a young company gets looked up by people who matter — investors, other founders, press. FoxPlug turns the commits, deploys, and releases you're already making into that story automatically, so anyone who looks finds something current. FoxChat puts a guide on your own site so the people YC's own page just sent you don't read one line and leave.

Sourced from the company's Y Combinator directory entry.

Tools for this story

Each opens in a new tab, filled in for Multifactor. With no account yet, you sign up free and land on the result.

Cite this page

Permanent URL: https://mentionfox.com/funding/yc-multifactor
Last updated 2026-09-26
Primary record: Y Combinator directory entry
Multifactor (YC F25) — Zero-trust authentication, authorization, and auditing for AI agents. MentionFox, 2026-09-26. https://mentionfox.com/funding/yc-multifactor