# Spiral funding: rounds and investors > Spiral has raised $27M across 4 rounds since 2023. Investors include Techstars, Alumni Ventures and General Catalyst. Every round with its source. Source: https://millionrounds.com/company/spiral (Millionrounds; every figure on the page links to its filing or article) Japan · [Series A startup](https://millionrounds.com/companies) # Who invested in *Spiral* 4 rounds we have observed, with the 8 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. Drones Funding summary Updated 26 Oct 2026 **$27M** raised across 4 rounds since 2023, from 4 sources **$3.1M** Venture **$100K** Grant **$2.1M** Seed **$22M** Series A - **Latest round:** Series A, $22M Sept 2025 - **Step-up i:** 10.5× - **Investors:** 8 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 **$3.1M** Venture **$100K** Grant **$2.1M** Seed **$22M** Series A - **First round:** Venture, $3.1M - **Biggest round:** $22M - **Usual gap between rounds:** 6 months ## The rounds - **Sept 2025** Series A **$22M** *2 new* [General Catalyst](https://millionrounds.com/fund/general-catalyst) [Amplify Partners](https://millionrounds.com/fund/amplify-partners) Source recorded - **Aug 2024** Seed **$2.1M** *1 new* [Mitsubishi UFJ Capital](https://millionrounds.com/fund/mitsubishi-ufj-capital-co-ltd) Source recorded - **Feb 2024** Grant **$100K** *2 new* [Curql](https://millionrounds.com/fund/curql) Team8 Source recorded - **Dec 2023** Venture **$3.1M** *3 new* [Techstars](https://millionrounds.com/fund/techstars) [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) [Ascend](https://millionrounds.com/fund/ascend) 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. **Venture** 2023 **Grant** 2024 **Seed** 2024 **Series A** 2025 [Techstars](https://millionrounds.com/fund/techstars) [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) [General Catalyst](https://millionrounds.com/fund/general-catalyst) [Mitsubishi UFJ Capital](https://millionrounds.com/fund/mitsubishi-ufj-capital-co-ltd) [Amplify Partners](https://millionrounds.com/fund/amplify-partners) [Ascend](https://millionrounds.com/fund/ascend) [Curql](https://millionrounds.com/fund/curql) Team8 ## Everyone who backed them [Techstars](https://millionrounds.com/fund/techstars) VC firm **1** round [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) VC firm **1** round [General Catalyst](https://millionrounds.com/fund/general-catalyst) VC firm **1** round [Mitsubishi UFJ Capital](https://millionrounds.com/fund/mitsubishi-ufj-capital-co-ltd) VC firm **1** round [Amplify Partners](https://millionrounds.com/fund/amplify-partners) VC firm **1** round [Ascend](https://millionrounds.com/fund/ascend) VC firm **1** round [Curql](https://millionrounds.com/fund/curql) VC firm **1** round Team8 no record of our own yet **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=spiral). ## Quick answers about Spiral ### Who invested in Spiral? Spiral's investors include Techstars, Alumni Ventures, General Catalyst, Mitsubishi UFJ Capital and Amplify Partners, and 3 more on record. ### How much has Spiral raised? Spiral has raised $27M across 4 rounds since 2023. ### When did Spiral last raise? Spiral's most recent round was a Series A of $22M in Sept 2025. ### What was Spiral's biggest round? Its most recent round, $22M in Sept 2025, is also its largest on record. ### Who backed Spiral first? Spiral's first round on record, in Dec 2023, was backed by Techstars, Alumni Ventures and Ascend. ### What stage is Spiral at? Spiral's latest named round is a Series A, in Sept 2025. ### Where is Spiral based? Spiral is based in Japan. ## Companies like Spiral In the same sector, and raised in the last eighteen months. [**Prodrone** Apr 2026](https://millionrounds.com/company/prodrone)[**SORA Technology** $2.5M · Jan 2026](https://millionrounds.com/company/sora-technology)[**FullDepth** $61M · Dec 2025](https://millionrounds.com/company/fulldepth)[**Beyond Vision** $31M · Oct 2026](https://millionrounds.com/company/beyond-vision)[**Buntar Aerospace** $16M · Oct 2026](https://millionrounds.com/company/buntar-aerospace)[**Occam** $4.3M · Sept 2026](https://millionrounds.com/company/occam) ## 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