We're redefining "zero-trust" for the agentic era.

Joined February 2018
Multifactor (YC F25) retweeted
Doing a survey for something we're working on at @MultifactorCOM: -What online accounts are you most often sharing with friends/family/significant others? -Are there any online accounts you've wanted to share with them but haven't felt comfortable doing it? Reply or DM me!
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Multifactor (YC F25) retweeted
Making a strategic acquisition as a seed-stage company was not a decision I took lightly, but so far all I'm wondering is why we didn't do this sooner. We first met the Keypo folks about 6 months ago during the YC batch, and were blown away by not only their alignment on highly complementary problems in the agent security space, but more importantly the strong common principles and values that underpin both of our companies. Behind the scenes, we've been working with Dave full-time for about a month while the acquisition was being finalized, and immediately noticed a boost in energy and productivity across our entire team. Dave's background and experience in security, authentication, AI agents, and trusted hardware is unparalleled. He's been an absolute pleasure to work with so far, and I'm so excited to share updates about what we're building together in the coming weeks and months.
6 months ago, we met a team that was remarkably well aligned with our agentic security vision. Today, we're joining forces. We've officially acquired Keypo, Inc., and its founder Dave Blumenfeld is joining us as Founding Engineer, bringing his work on secure enclaves directly into our platform.
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Multifactor (YC F25) retweeted
We share our offices with @MultifactorCOM, one of the best AI agent security companies out of YC. Our claude has context that we do this. So, when asked, Opus 4.6 created this video for Multifactor. Passwords are so last epoch with Multifactor.
Used this prompt with some modifications to create a YTP video for my startup. This is the first piece of pure AI slop that is good. And it's because it had all my context on my company. @KoyalAI is an agentic AI filmmaking platform that converts scripts into films by intelligently routing across 40+ AI video models to get the best output for each shot or style. Please don't say AI doesn't understand creativity now. Yes, we should be afraid but dw, we're making sure it helps humans. The best use of AI is with human creativity. But this is very close lol.
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Multifactor (YC F25) retweeted
Congratulations to Multifactor on the $15m seed round straight out of YC's fall batch. This was one of our earliest and fastest investments in F25 at @pioneer_fund. Outlier founders. They're making it possible for AI agents to operate accounts securely.
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Multifactor (YC F25) retweeted
We're proud to be leading $15M seed round into @MultifactorCOM, to make online accounts fundamentally safe for the age of AI agents. Securely connecting our accounts to AI tools, while keeping users in control, is the need of the hour. As AI agents become part of how we collaborate, the need for mathematically provable identity foundations has never been clearer. Multifactor is building exactly that - a secure way for humans and AI to share access without exposing credentials. Vivek and @Autoparallel - Thanks for picking @NexusVP as your partner! Excited to be on this journey with you, along with an incredible group of supporters and advisors, including @Padmasree, @gokulr, @collinmathilde, @auren, @ycombinator, @dessaigne, @Liquid2V, and more. As Vivek mentions in his post: Identity should be our strongest defense, not our biggest vulnerability. Onward! See @eringriffith's feature of Multifactor in today's @nytimes article: nytimes.com/2025/12/04/techn… #AI #Identity #Security
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Multifactor (YC F25) retweeted
Sharing logins with AI used to sound like giving your house keys to a raccoon. Multifactor turns that chaos into security art. It’s zero-trust with 100 percent confidence. Now even your AI can knock politely before entering your accounts.
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Multifactor (YC F25) retweeted
Multifactor (@MultifactorCOM) is building the future of zero-trust authentication, authorization, and auditing for AI agents. Their platform lets users securely and revocably share any online account with humans and AI agents alike, just by sending a link.
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Multifactor (YC F25) retweeted
These mad lads are so confident in their product security that they put their actual bank account details on Times Square! 🤯
The Multifactor Challenge is live! Anyone with Multifactor can now use our Checkpoint link to log into our business checking account on Meow, where we’ve stashed $1 million in VC funding. Every dollar we’ve received from YC is in there, but we’re not worried. Our Checkpoint account-sharing system has disabled transfers and withdrawals, and our credentials are protected by Multifactor’s post-quantum-secure encryption. If the laws of math don’t fail us, our funding will be just fine. Check out the video below for the link, and be sure to follow us here for live updates.
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Multifactor (YC F25) retweeted
My path has always been about building bridges between worlds—from mathematical proofs to production code. In 2022, I saw a game-changing idea that planted the seed for this entire journey. Now, I'm taking my biggest leap yet as Co-Founder & CTO of @MultifactorCOM. I wrote the full story of why I'm convinced our tech "trifecta" will redefine security. You can read it here:
Colin Roberts, Co-Founder and CTO, shares his journey from pure mathematics to crypto-focused startups and now Multifactor, explaining why he's excited about the future of the company: multifactor.com/blog/colin-r…
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Multifactor (YC F25) retweeted
I don't get how people manage 500+ accounts. I guess you just... don't? Password managers are just a list of secrets, but you still have to open a web page, follow some flow, then you finally get to do a thing which can also be highly repetitive. Kinda sucks and is even worse at scale. We figured you should be able to just... use all of them. At once. So we're making that. Still needs some work I guess. 😅
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Multifactor (YC F25) retweeted
1️⃣ Nos complace anunciar que @MultifactorCOM ha sido seleccionada para recibir una Zcash Community Grant con el objetivo de desarrollar MFKDF2.  Este paso refuerza el compromiso con la innovación de clave en el ecosistema Zcash. multifactor.com/blog/zcash-g…
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Multifactor (YC F25) retweeted
We’re excited to announce that Hertz Fellow Vivek Nair is the recipient of this year’s Harold Newman and David Galas Entrepreneurial Initiative for his startup, Multifactor. As AI introduces new vulnerabilities, Vivek is pioneering what he calls the next pillar of cybersecurity: agentic AI security. @Multifactor—co-founded with mathematician and cryptographer Colin Roberts—has also been selected for the Fall 2025 @YCombinator cohort, a powerful recognition of the impact ahead. 👏 Congratulations, Vivek—we’re excited to see Multifactor’s impact grow. Learn more 🔗bit.ly/475VXea #AI #cybersecurity #startup #innovation #Tech #Leadership
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Multifactor (YC F25) retweeted
Big news: @KoyalAI is now a @ycombinator F25 company. We're building an agentic filmmaking platform that turns your voice into cinematic videos starring you. Grateful to @dessaigne for believing in @meh_agarwal and me from the very start. P.S. We support all the leading models and are working on day-0 SORA 2 integration, if it's good
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Multifactor (YC F25) retweeted
same
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Multifactor (YC F25) retweeted
The best password manager in the world... fully feature complete. Foundation of post-quantum encryption and novel key derivation is worth seeing for yourself 👀 ... Okay fine, there may be a feature or two missing. For now.
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Multifactor (YC F25) retweeted
Why are hyperlinks blue?
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Multifactor (YC F25) retweeted
Now that Cloudflare containers are faster than Github actions, has anyone made docs around how I can use Cloudflare containers as my action runner?
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Multifactor (YC F25) retweeted
Cloudflare launched at TechCrunch Disrupt on September 27, 2010 — 15 years ago today. 🚀 “It set the tone for Cloudflare’s deadline culture.” Full interview with co-founders Matthew Prince & Michelle Zatlyn: 🌐 ThisWeekinNET.com
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