# Theorem funding: rounds and investors > Theorem has raised $6.1M across 2 rounds since 2014. Investors include Y Combinator, Khosla Ventures and Pioneer Fund. Every round with its source. Source: https://millionrounds.com/company/theorem (Millionrounds; every figure on the page links to its filing or article) United States · [Seed startup](https://millionrounds.com/companies) # Who invested in *Theorem* 2 rounds we have observed, with the 4 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it. AI Raised 10 months ago Y Combinator: W14 Funding summary Updated 26 Oct 2026 **$6.1M** raised across 2 rounds since 2014, from 2 sources **$120K** Seed **$6.0M** Seed - **Latest round:** Seed, $6.0M Jan 2026 - **Step-up i:** 50× - **Investors:** 4 See who backed them ## The funding story Each circle is a round, placed by date and sized by amount. The line above is the running total. 2014 2016 2018 2020 2022 2024 2026 **$120K** Seed **$6.0M** Seed - **First round:** Seed, $120K - **Biggest round:** $6.0M - **Between rounds:** 11.5 years ## The rounds - **Jan 2026** Seed **$6.0M** *3 new* *1 returning* [Y Combinator](https://millionrounds.com/fund/y-combinator) [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) [Pioneer Fund](https://millionrounds.com/fund/pioneer-fund-2) [The E14 Fund](https://millionrounds.com/fund/e14-fund) Source recorded - **Jul 2014** Seed **$120K** *1 new* [Y Combinator](https://millionrounds.com/fund/y-combinator) From a historical funding record ## Who was in which round The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led. **Seed** 2014 **Seed** 2026 [Y Combinator](https://millionrounds.com/fund/y-combinator) [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) [Pioneer Fund](https://millionrounds.com/fund/pioneer-fund-2) [The E14 Fund](https://millionrounds.com/fund/e14-fund) ## Everyone who backed them [Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **2** rounds [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) VC firm **1** round [Pioneer Fund](https://millionrounds.com/fund/pioneer-fund-2) Private equity **1** round [The E14 Fund](https://millionrounds.com/fund/e14-fund) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=theorem). ## Also claim to have backed them This firm lists Theorem as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above. [SAIF (Safe AI Fund)](https://millionrounds.com/fund/saif-safe-ai-fund) VC firm Per its own site ## Quick answers about Theorem ### Who invested in Theorem? Theorem's investors include Y Combinator, Khosla Ventures, Pioneer Fund and The E14 Fund. ### How much has Theorem raised? Theorem has raised $6.1M across 2 rounds since 2014. ### When did Theorem last raise? Theorem's most recent round was a Seed of $6.0M in Jan 2026. ### What was Theorem's biggest round? Its most recent round, $6.0M in Jan 2026, is also its largest on record. ### Who backed Theorem first? Theorem's first round on record, in Jul 2014, was backed by Y Combinator. ### What stage is Theorem at? Theorem's latest named round is a Seed, in Jan 2026. ### Where is Theorem based? Theorem is based in the United States. ## Companies like Theorem In the same sector, and raised in the last eighteen months. [**SpaceX** $42B · Oct 2026](https://millionrounds.com/company/spacex)[**xPay** $1.5M · Oct 2026](https://millionrounds.com/company/xpay)[**Albert Invent** $20M · Oct 2026](https://millionrounds.com/company/albert-invent)[**FORT Robotics** $39M · Oct 2026](https://millionrounds.com/company/fort-robotics)[**Pika** $216M · Oct 2026](https://millionrounds.com/company/pika)[**Vertical Semiconductor** $84M · Oct 2026](https://millionrounds.com/company/vertical-semiconductor) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. Open the investor searchOr these rounds in the app