Theorem was founded by Jason Gross, Rajashree Agrawal in 2025.

Who are Theorem's investors?

Theorem's investors include Y Combinator, Batch Ventures, Blast.Club, DCVC (Data Collective), Eight Capital, FAST — by GETTYLAB, Halcyon, Halcyon Futures Investments and 5 more.

How much funding has Theorem raised?

Theorem has disclosed $6M raised across 1 round.

Where is Theorem headquartered?

Theorem is headquartered in San Francisco, US.

Theorem

YC X25

San Francisco, US · Founded 2025 · 4 employees · Hiring · 14 known investors

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Theorem.dev provides verified software engineering through lf-lean, an AI-powered translation tool that converts formal mathematical proofs from Rocq to Lean significantly faster than manual translation.

Also known as Theorem Labs, PBC · Aletheia

AI & Machine Learning Developer Tools Enterprise Software Machine LearningUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (X25)

Theorem was founded in 2025 by Jason Gross and Rajashree Agrawal.

Jason Gross Co-FounderJason Gross worked on code infrastructure used by major browsers including Chrome.

Rajashree Agrawal Co-founderRajashree Agrawal is the founder of Theorem.dev, which provides AI-powered translation tools for converting formal mathematical proofs between proof assistants.

Abeer Agrawal Founder

Hugh EdmundsonFounder

Investors · 14

Y Combinatorlisted by Y CombinatorSan Francisco · $500K

How we know: the Y Combinator directory · radicaldatascience.wordpress.com · open dataset · 5k.vc investor directory · Not right? Tell us

Batch Venturesreported

How we know: Y Combinator's founder network · Not right? Tell us

Blast.Clubreported$5.5M

How we know: Y Combinator's founder network · Not right? Tell us

DCVC (Data Collective)reportedPalo Alto · $5M – $25M

How we know: open dataset · 5k.vc investor directory · Not right? Tell us

Eight CapitalreportedNorwalk

How we know: Y Combinator's founder network · Not right? Tell us

FAST — by GETTYLABreportedSan Francisco · $100K

How we know: Y Combinator's founder network · Not right? Tell us

HalcyonreportedWashington

How we know: radicaldatascience.wordpress.com · Not right? Tell us

Halcyon Futures InvestmentsreportedSanta Monica

How we know: Y Combinator's founder network · Not right? Tell us

Khosla VenturesreportedMenlo Park · $100K – $20M

How we know: a partner's Signal profile · funding news · radicaldatascience.wordpress.com · Not right? Tell us

Moonfire VenturesreportedLondon

How we know: Y Combinator's founder network · Not right? Tell us

PioneerreportedToronto, Ontario

How we know: Y Combinator's founder network · open dataset · 5k.vc investor directory · Not right? Tell us

SAIFreportedBeijing · $10M – $100M

How we know: radicaldatascience.wordpress.com · Not right? Tell us

The E14 FundreportedCambridge · $1M – $5M

How we know: Y Combinator's founder network · Not right? Tell us

Also in the syndicate · 1

e14

Funding

SEC filings, press & company announcements

$6M disclosed across 1 round · 2026

$6Mseed fundingJan 2026
Khosla Ventures (lead), e14, Halcyon, SAIF, YC
Source ↗

Source: company announcements and press reports — follow each round's link for the claim.

Founder mafia

2 people who came through Theorem went on to found or lead other companies.

Abeer AgrawalFounderFounded Theorem +1 Jason GrossCEOFounded Petal

Related companies · 9

RevlRevl develops AI-powered video capture and editing technology that automatically creates cinematic videos in real-time for experiential activities. The company targets the experience economy market, including adventure sports, cruises, and similar attractions.

WorkatastartupY Combinator's job board where candidates use one profile to apply to roles at YC-backed startups.

SlopeSlope provides a B2B payments platform that enables businesses to accept payments and offer financing, with a focus on digitizing the order-to-cash process for online commerce. The company uses generative AI to modernize traditionally manual B2B payment workflows.

3DsDassault Systèmes provides a unified 3D design and simulation platform (3DEXPERIENCE) that enables manufacturing, life sciences, healthcare, and infrastructure companies to create virtual twins of products and systems for innovation and optimization.

TokoToko is an AI-powered English conversation tutor that provides personalized speaking practice with real-time grammar and pronunciation feedback. It serves English learners globally with 1,000+ conversation topics, exam preparation modules, and workplace communication training.

TuringAGI infrastructure company solving the human intelligence bottleneck and empowering enterprises to harness generative AI.

SiftSift provides an AI-powered platform for fraud prevention and risk decisioning that helps digital businesses detect and manage online fraud. The platform serves companies across industries looking to reduce fraud losses while enabling secure growth.

QuellQuell develops fitness gaming software that combines combat-based gameplay with physical exercise, helping users achieve fitness goals through interactive gaming experiences.

TraversalTraversal builds an agentic AI system that uses machine learning to autonomously analyze telemetry data and troubleshoot production incidents for enterprise software teams. The platform leverages causal machine learning and reinforcement learning to enable self-healing software and improve site reliability.

Companies working in the same space as Theorem.

Legal entities · 1

corporate structure

Theorem Labs, PBC

In the news

Theorem – AI coding that is trustworthy-by-defaultycombinator.com · May 2025

Frequently asked questions

What does Theorem do?: Theorem.dev provides verified software engineering through lf-lean, an AI-powered translation tool that converts formal mathematical proofs from Rocq to Lean significantly faster than manual translation.
Who founded Theorem?: Theorem was founded by Jason Gross, Rajashree Agrawal in 2025.
Who are Theorem's investors?: Theorem's investors include Y Combinator, Batch Ventures, Blast.Club, DCVC (Data Collective), Eight Capital, FAST — by GETTYLAB, Halcyon, Halcyon Futures Investments and 5 more.
How much funding has Theorem raised?: Theorem has disclosed $6M raised across 1 round.
Where is Theorem headquartered?: Theorem is headquartered in San Francisco, US.