# Rainmaker funding: rounds and investors > Rainmaker has raised $126M across 3 rounds since 2023. Investors include Long Journey Ventures, Lowercarbon Capital and Y Combinator. Source: https://millionrounds.com/company/rainmaker (Millionrounds; every figure on the page links to its filing or article) United States · [Series B startup](https://millionrounds.com/companies) # Who invested in *Rainmaker* 3 rounds we have observed, with the 9 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. Consumer Apps Cleantech Climate Tech Water Raised 1 month ago Y Combinator: W23 Funding summary Updated 26 Oct 2026 **$126M** raised across 3 rounds since 2023, from 5 sources **$500K** Pre-seed **$25M** Series A **$100M** Series B - **Latest round:** Series B, $100M Sept 2026 - **Step-up i:** 4× - **Investors:** 9 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 2026 **$500K** Pre-seed **$25M** Series A **$100M** Series B - **First round:** Pre-seed, $500K - **Biggest round:** $100M - **Usual gap between rounds:** 2.1 years ## The rounds - **Sept 2026** Series B **$100M** *5 new* *2 returning* [DCVC](https://millionrounds.com/fund/data-collective) [Upfront Ventures](https://millionrounds.com/fund/upfront-ventures) [Long Journey Ventures](https://millionrounds.com/fund/long-journey-ventures) [Lowercarbon Capital](https://millionrounds.com/fund/lowercarbon-capital) [M Ventures](https://millionrounds.com/fund/m-ventures) [Noa](https://millionrounds.com/fund/noa) [Dream Ventures](https://millionrounds.com/fund/dream-ventures) Reported by TechStartups and 2 others - **May 2025** Series A **$25M** *3 new* [Long Journey Ventures](https://millionrounds.com/fund/long-journey-ventures) [Lowercarbon Capital](https://millionrounds.com/fund/lowercarbon-capital) [1517 Fund](https://millionrounds.com/fund/1517-fund) Source recorded - **Apr 2023** Pre-seed **$500K** *1 new* [Y Combinator](https://millionrounds.com/fund/y-combinator) Source recorded ## 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. **Pre-seed** 2023 **Series A** 2025 **Series B** 2026 [Long Journey Ventures](https://millionrounds.com/fund/long-journey-ventures) [Lowercarbon Capital](https://millionrounds.com/fund/lowercarbon-capital) [Y Combinator](https://millionrounds.com/fund/y-combinator) [DCVC](https://millionrounds.com/fund/data-collective) [Upfront Ventures](https://millionrounds.com/fund/upfront-ventures) [M Ventures](https://millionrounds.com/fund/m-ventures) [1517 Fund](https://millionrounds.com/fund/1517-fund) [Noa](https://millionrounds.com/fund/noa) [Dream Ventures](https://millionrounds.com/fund/dream-ventures) ## Everyone who backed them [Long Journey Ventures](https://millionrounds.com/fund/long-journey-ventures) VC firm **2** rounds [Lowercarbon Capital](https://millionrounds.com/fund/lowercarbon-capital) VC firm **2** rounds [Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **1** round [DCVC](https://millionrounds.com/fund/data-collective) VC firm **1** round [Upfront Ventures](https://millionrounds.com/fund/upfront-ventures) VC firm **1** round [M Ventures](https://millionrounds.com/fund/m-ventures) Corporate VC **1** round [1517 Fund](https://millionrounds.com/fund/1517-fund) VC firm **1** round [Noa](https://millionrounds.com/fund/noa) VC firm **1** round [Dream Ventures](https://millionrounds.com/fund/dream-ventures) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=rainmaker). ## Also claim to have backed them These 6 firms list Rainmaker as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above. [Invariantes Fund](https://millionrounds.com/fund/invariantes-fund) VC firm Per its own site [Mute Ventures](https://millionrounds.com/fund/mute-ventures) VC firm Per its own site [E1 Ventures](https://millionrounds.com/fund/e1-ventures) VC firm Per its own site [Ironmonger360](https://millionrounds.com/fund/ironmonger360) Family office Per its own site [Roadrunner Ventures](https://millionrounds.com/fund/roadrunner-ventures) VC firm Per its own site [Shor Capital](https://millionrounds.com/fund/shor-capital) VC firm Per its own site ## Quick answers about Rainmaker ### Who invested in Rainmaker? Rainmaker's investors include Long Journey Ventures, Lowercarbon Capital, Y Combinator, DCVC and Upfront Ventures, and 4 more on record. ### How much has Rainmaker raised? Rainmaker has raised $126M across 3 rounds since 2023. ### When did Rainmaker last raise? Rainmaker's most recent round was a Series B of $100M in Sept 2026. ### What was Rainmaker's biggest round? Its most recent round, $100M in Sept 2026, is also its largest on record. ### Who backed Rainmaker first? Rainmaker's first round on record, in Apr 2023, was backed by Y Combinator. ### What stage is Rainmaker at? Rainmaker's latest named round is a Series B, in Sept 2026. ### Where is Rainmaker based? Rainmaker is based in the United States. ## Companies like Rainmaker In the same sector, and raised in the last eighteen months. [**Amogy** $125M · Oct 2026](https://millionrounds.com/company/amogy)[**LanzaJet** $67M · Oct 2026](https://millionrounds.com/company/lanzajet)[**Pivot Energy** $500M · Oct 2026](https://millionrounds.com/company/pivot-energy)[**Pennsylvania American Water** $43M · Oct 2026](https://millionrounds.com/company/pennsylvania-american-water)[**ZwitterCo** $58M · Oct 2026](https://millionrounds.com/company/zwitterco)[**Peak Energy** $163M · Oct 2026](https://millionrounds.com/company/peak-energy) ## 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