About
We’re redefining “zero-trust.”
When security companies say “zero-trust,” they often mean “trust our software, hardware and staff.” We mean it. Multifactor lets you share any online account with people and AI agents without ever actually sharing the password.
Public Benefit Corporation
Advancing cybersecurity for all.
Our commitmentBacked by Y Combinator
Part of Y Combinator’s Fall 2025 batch.
Our YC page$15M seed round
Led by Nexus Venture Partners.
Our seed roundA decade of research
Patented and peer-reviewed.
Our research
Our team
The people building Multifactor
The people who make it possible.

Vivek Nair, Ph.D.
Founder & CEO
Vivek has spent over a decade researching applied cryptography. He was a Technical Lead in elite cyber units of the CIA and the US Department of Defense, and finished his Ph.D. in Computer Science at UC Berkeley at 22.

Dave Blumenfeld
Founding Engineer
Dave spent ten years in the defense industry as an ASIC designer, then founded Studio 256, a Web3 consultancy. In 2024 he co-founded Keypo, which built programmable encryption on secure hardware and joined Multifactor in 2026.

Pierre Ortega
Founding Engineer
Pierre spent five years as a senior engineer at Synthesis, building its iPad app and leading the move of its game servers from Heroku to Kubernetes for 10,000 learners. Before that, he built API security scanners at Data Theorem.

James Burns
Design Engineer
James studied graphic design at Uludag University and design and visual communications at Anadolu University. He designed websites for Dogslanding for three years, and as a freelancer on 99designs, before joining Multifactor in 2026.
Advisory board
The people who advise us
Their expertise spans augmented reality, artificial intelligence, computer security, complex systems modeling and deep-technology entrepreneurship.

Padma Warrior
Former CTO, Cisco & Motorola
Former CEO, NIO & Fable
Board Member, Microsoft & Spotify

Mohan Warrior
Angel Investor & Advisor
Former CEO, Alfalight
Former CEO, Nanocoolers

Louis Rosenberg, Ph.D.
CEO & Founder, Unanimous AI
Founder, Immersion Corp. ($IMMR)
Prolific Inventor, 300+ Patents

Dawn Song, Ph.D.
Professor, UC Berkeley
135,000+ Paper Citations
MacArthur Genius

Philip Welkhoff, Ph.D.
Director, Gates Foundation
PI, Intellectual Ventures
Ph.D., Princeton University

Martina Welkhoff
Entrepreneur & Investor
Founding Partner, WXR Fund
Founder, Zealyst & ConveneVR

Max Kleiman-Weiner, Ph.D.
Professor, University of Washington
Scout Investor, Sequoia Capital
Founder, Common Sense Machines

Judy Savitskaya, Ph.D.
Deal Lead, Stripe
Former Investment Partner, a16z
Ph.D., Bioengineering, UC Berkeley
Share your first account in under a minute.
Get started for free. Discover your new favorite way to share online accounts.