# Altitude funding: rounds and investors > Altitude has raised $11M across 2 rounds since 2024. Investors include Y Combinator, GSR and Lerer Hippeau. Every round with its source. Source: https://millionrounds.com/company/altitude (Millionrounds; every figure on the page links to its filing or article) United States · [Seed startup](https://millionrounds.com/companies) # Who invested in *Altitude* 2 rounds we have observed, with the 6 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 Funding summary Updated 26 Oct 2026 **$11M** raised across 2 rounds since 2024, from 2 sources **$4.0M** Seed **$6.9M** Seed - **Latest round:** Seed, $6.9M Oct 2025 - **Step-up i:** 1.7× - **Investors:** 6 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. 2024 2025 **$4.0M** Seed **$6.9M** Seed - **First round:** Seed, $4.0M - **Biggest round:** $6.9M - **Between rounds:** 21 months ## The rounds - **Oct 2025** Seed **$6.9M** *4 new* [Y Combinator](https://millionrounds.com/fund/y-combinator) [Lerer Hippeau](https://millionrounds.com/fund/lerer-hippeau) [AlleyCorp](https://millionrounds.com/fund/alleycorp) [Tau Ventures](https://millionrounds.com/fund/tau-ventures) Source recorded - **Jan 2024** Seed **$4.0M** *2 new* [GSR](https://millionrounds.com/fund/gsr) [Owl Ventures](https://millionrounds.com/fund/owl-ventures) Source recorded ## Founders and team From Altitude's own website: 2 founders. **Tobias van Amstel** Co-founder and CEO **Ronald van Spronsen** Co-founder and CTO ## 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** 2024 **Seed** 2025 [Y Combinator](https://millionrounds.com/fund/y-combinator) [GSR](https://millionrounds.com/fund/gsr) [Lerer Hippeau](https://millionrounds.com/fund/lerer-hippeau) [AlleyCorp](https://millionrounds.com/fund/alleycorp) [Owl Ventures](https://millionrounds.com/fund/owl-ventures) [Tau Ventures](https://millionrounds.com/fund/tau-ventures) ## Everyone who backed them [Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **1** round [GSR](https://millionrounds.com/fund/gsr) VC firm **1** round [Lerer Hippeau](https://millionrounds.com/fund/lerer-hippeau) VC firm **1** round [AlleyCorp](https://millionrounds.com/fund/alleycorp) Venture studio **1** round [Owl Ventures](https://millionrounds.com/fund/owl-ventures) VC firm **1** round [Tau Ventures](https://millionrounds.com/fund/tau-ventures) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=altitude). ## Quick answers about Altitude ### Who invested in Altitude? Altitude's investors include Y Combinator, GSR, Lerer Hippeau, AlleyCorp and Owl Ventures, and 1 more on record. ### How much has Altitude raised? Altitude has raised $11M across 2 rounds since 2024. ### When did Altitude last raise? Altitude's most recent round was a Seed of $6.9M in Oct 2025. ### What was Altitude's biggest round? Its most recent round, $6.9M in Oct 2025, is also its largest on record. ### Who backed Altitude first? Altitude's first round on record, in Jan 2024, was backed by GSR and Owl Ventures. ### What stage is Altitude at? Altitude's latest named round is a Seed, in Oct 2025. ### Where is Altitude based? Altitude is based in the United States. ## Companies like Altitude 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