# Zerostack funding: rounds and investors > Zerostack has raised $1.0B across 3 rounds since 2015. Investors include Foundation Capital and Formation 8. Every round with its source. Source: https://millionrounds.com/company/zerostack (Millionrounds; every figure on the page links to its filing or article) United States · [Series B startup](https://millionrounds.com/companies) # Who invested in *Zerostack* 3 rounds we have observed, with the 2 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. IT Services Raised 2 months ago Funding summary Updated 26 Oct 2026 **$1.0B** raised across 3 rounds since 2015, from 4 sources **$5.6M** Series A **$16M** Series B **$1.0B** Round - **Latest round:** Round, $1.0B Sept 2026 - **Step-up i:** 62.5× - **Investors:** 2 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. 2015 2017 2019 2021 2023 2025 **$5.6M** Series A **$16M** Series B **$1.0B** Round - **First round:** Series A, $5.6M - **Biggest round:** $1.0B - **Usual gap between rounds:** 10.8 years ## The rounds - **Sept 2026** Round **$1.0B** No investor was named in the report. Filed with the SEC (Form D); no report of this raise yet and 1 other SEC filing: $1.0B sold, first sale Sept 2026 - **Oct 2015** Series B **$16M** *1 new* *1 returning* [Foundation Capital](https://millionrounds.com/fund/foundation-capital) [Formation 8](https://millionrounds.com/fund/formation-8) From a historical funding record - **Aug 2015** Series A **$5.6M** *1 new* [Foundation Capital](https://millionrounds.com/fund/foundation-capital) 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. **Series A** 2015 **Series B** 2015 **Round** 2026 [Foundation Capital](https://millionrounds.com/fund/foundation-capital) [Formation 8](https://millionrounds.com/fund/formation-8) ## Everyone who backed them [Foundation Capital](https://millionrounds.com/fund/foundation-capital) VC firm **2** rounds [Formation 8](https://millionrounds.com/fund/formation-8) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=zerostack). ## Quick answers about Zerostack ### Who invested in Zerostack? Zerostack's investors include Foundation Capital and Formation 8. ### How much has Zerostack raised? Zerostack has raised $1.0B across 3 rounds since 2015. ### When did Zerostack last raise? Zerostack's most recent round, $1.0B, was in Sept 2026. ### What was Zerostack's biggest round? Its most recent round, $1.0B in Sept 2026, is also its largest on record. ### Who backed Zerostack first? Zerostack's first round on record, in Aug 2015, was backed by Foundation Capital. ### What stage is Zerostack at? Zerostack's latest named round is a Series B, in Oct 2015. ### Where is Zerostack based? Zerostack is based in the United States. ## Companies like Zerostack In the same sector, and raised in the last eighteen months. [**Chariot Claims** $23M · Oct 2026](https://millionrounds.com/company/chariot-claims)[**Subeca** $9.0M · Oct 2026](https://millionrounds.com/company/subeca)[**FlexCompute** $53M · Oct 2026](https://millionrounds.com/company/flexcompute)[**Negosh** $3.1M · Oct 2026](https://millionrounds.com/company/negosh)[**StarLifter** $4.0M · Oct 2026](https://millionrounds.com/company/starlifter)[**Litewave.AI** $1.7M · Oct 2026](https://millionrounds.com/company/litewave-ai) ## 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