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Jason Gross

InvestorFounder

Founder at Theorem · Founder at Petal

San Francisco, California, United States

FoundedPetalTheorem · YC

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About

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

Founder at TheoremYC X25

Intro paths

YC

Jason went through Y Combinator (Spring 2025) — any YC alum in your network can reach them through the YC community.

GP

Their group partner at YC was Tom Blomfield, Monzo and GoCardless co-founder; Y Combinator partner on leave and Anthropic compute-team member. — the partner who ran Theorem's batch and knows the company first-hand. YC profile ↗

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In turn, Jason can intro founders to Theorem's investors below.

Theorem's investors · 12

Batch VenturesBlast.Club$5.5M checksDCVC (Data Collective)Palo Alto · $5M – $25M checksEight CapitalNorwalkFAST — by GETTYLABSan Francisco · $100K checksHalcyonWashington · since 2026Halcyon Futures InvestmentsSanta MonicaKhosla VenturesMenlo Park · $100K – $20M checks · since 2026Moonfire VenturesLondonPioneerToronto, OntarioSAIFBeijing · $10M – $100M checks · since 2026Y CombinatorSan Francisco · $500K checks · since 2025

Co-founders at Theorem

RARajashree Agrawal
Rajashree AgrawalFounder
AAAbeer Agrawal
Abeer AgrawalFounder
HE
Hugh EdmundsonFounder

Founder at Petal

Intro paths

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In turn, Jason can intro founders to Petal's investors below.

Petal's investors · 21

Abenteuer.Venturessince 2020Afore CapitalSan Francisco · $500K – $2M checks · since 2020Andreessen HorowitzMenlo Park · $500K – $50M checks · since 2020Bare VenturesWashington · since 2020Connetic VenturesCovington · $250K – $500K checks · since 2020Evolution VC PartnersNew York · since 2020Fairhaven Capital Partnerssince 2020Great Oaks Venture CapitalNew York · $50K – $500K checks · since 2020K50 VenturesEncinitas · $50K – $250K checks · since 2025Nat TurnerNew York City · since 2020Nelstone Venturessince 2020New Ground VenturesWestport · since 2020RiverPark VenturesNew York · $500K – $1.5M checks · since 2020Rosecliff VenturesNew York City · $500K checks · since 2020Sand Hill AngelsMenlo Park · $50K – $2M checks · since 2020ShangBay Capital LLCPalo Alto · since 2025Story VenturesNew York · $100K – $1M checks · since 2020Third PrimeNew York · $500K – $2M checks · since 2020TSVCSilicon Valley · $1M checks · since 2025Valar Ventures LlcSan Francisco · $100K – $5M checks · since 2020Village GlobalCovina · $500K – $3M checks · since 2020

Co-founders at Petal

AE
Andrew EndicottFounder
DE
David EhrichFounder
JA
Jack ArenasFounder

Experience

  1. TheoremCo-Foundercurrent2025 — present
  2. MITResearcher2012 — 2021Cambridge, Massachusetts, United States

Skills & more

Machine LearningPyTorchTechnical Project LeadershipAgdaMediationProgramming LanguagesFormal VerificationTeam LeadershipFunctional ProgrammingPerformance EngineeringPython1Java1
+12 moreMatlabCoqSchemePowerPointExcelWordMicrosoft OfficeResearchProblem SolvingProgrammingTeachingMathematics

From Jason's professional profile.

Investments

Investor

TrueBiz

Per curated public sources.

Frequently asked questions

Who is Jason Gross?
Jason Gross worked on code infrastructure used by major browsers including Chrome.
Where does Jason Gross work?
Jason Gross is Founder of Petal and Founder at Theorem.
What companies did Jason Gross found?
Jason Gross founded Petal, Theorem.
What companies has Jason Gross invested in?
Investments tracked here include TrueBiz.
Where did Jason Gross go to school?
Jason Gross studied at Massachusetts Institute of Technology (Doctor of Philosophy (PhD), Computer Science); Massachusetts Institute of Technology (Bachelor of Science, Mathematics).

Founder mafias

Theorem mafia2

Also came through, then founded or led a company.

Abeer AgrawalFounderFounded Theorem +1

Same school

Shared employers