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Theorem

Program verification so even your systems engineers can vibecode

Theorem is training models that make program verification 10,000 times faster. Using verification as a feedback loop, developers have found zero-days in GPU accelerated code and cryptography implementations, and sped up code migration in legacy systems. If you have complicated code that needs to be correct and secure, sign up for our beta!
Active Founders
Jason Gross
Jason Gross
Founder
Developed performant, verified code powering trillions of https connections to Chrome and other browsers.
Rajashree Agrawal
Rajashree Agrawal
Founder
Babysitting models.
Company Launches
Theorem – AI coding that is trustworthy-by-default
See original launch post

TL;DR: Please give us your most complicated coding problem that needs to be correct. Sign up!

Hello World! We’re Jason and Rajashree! We think AI code generation is going to be bigger than any of us can imagine.

MISSION

Theorem is an AI and programming languages research lab. Our question: as the models get better at generating code, what is the bottleneck to safely deploying vastly more computation in the world?

  • Code has bugs.  AI-enabled attackers will increase the volume and velocity of attacks on software infrastructure. Human code review will not scale.
  • AIs are untrusted generators. In order to deploy AIs in critical systems without fully understanding their generalization behavior, we’ll need robust, scalable methods for overseeing their solutions.

OPPORTUNITY

Programming languages and formal methods is the promise that we can bootstrap roots of trust. Even as complexity of software goes up, we can design simple interfaces for steering with leverage.

Previously, this technology was only applied to the most mission-critical infrastructure, because of the enormous labor bottleneck — requiring years of PhD level engineering work. For instance, Jason worked on the project that wrote the code generator powering trillions of secure https connections everyday, but it took fifteen man-years to complete!

With advances in AI, we’re able to speed this development cycle 10,000 times! As a wild example of what’s possible, we spent two hours finding what would have been a zero-day in https code from 2011.

OUR APPROACH

We want to build workflows for trustworthy-by-default programming by pushing our best ideas till they break. The current candidate to beat is program equivalence driven development. You oversee a simple reference implementation. We give you an optimized implementation, along with a proof that the programs are functionally equivalent.

We’re gradually rolling out our programming environment and models. Some use cases from our customers:

  • Performance optimization: finding edge cases where hyper-optimized GPU code would fail; getting clear documentation of dependencies that modify behavior in unforeseen ways.
  • Code migration: automating legacy code refactors from Python to Rust while proving no functional change; writing custom kernels to support new services.

If you work in public infrastructure, finance, hardware, or have other use cases that demand correctness, we’d love to help. Please reach out at founders@theoremlabs.com

Jobs at Theorem
San Francisco, CA, US
$150K - $250K
Any (new grads ok)
San Francisco, CA, US
$150K - $250K
Any (new grads ok)
San Francisco, CA, US
$300K - $500K
3+ years
San Francisco, CA, US
$300K - $500K
3+ years
Theorem
Founded:2025
Batch:Spring 2025
Team Size:4
Status:
Active
Location:San Francisco
Primary Partner:Tom Blomfield