Japan · Who invested in Spiral?
Spiral's investors include Techstars, Alumni Ventures, General Catalyst, Mitsubishi UFJ Capital and Amplify Partners, and 3 more on record.
20242025
$3.1MVenture$100KGrant$2.1MSeed$22MSeries A
Japan · Series A startup
Who invested in Spiral
Funding summaryUpdated 26 Oct 2026
$27Mraised across 4 rounds since 2023, from 4 sources
$3.1MVenture$100KGrant$2.1MSeed$22MSeries A
- Latest round
- Series A, $22MSept 2025
- Step-upi
- 10.5×
- Investors
- 8
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Venture, $3.1M Dec 2023
- Biggest round
- $22M Series A · Sept 2025
- Usual gap between rounds
- 6 months the median of 3
The rounds
- Sept 2025
- Aug 2024
- Feb 2024
- Dec 2023
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.
Venture2023Grant2024Seed2024Series A2025
Techstars
Alumni Ventures
General Catalyst
Mitsubishi UFJ Capital
Amplify Partners
Ascend
CurqlTeam8
TechstarsAlumni VenturesGeneral CatalystMitsubishi UFJ CapitalAmplify PartnersAscendCurqlTeam8Everyone who backed them
Team8no record of our own yet1round
Missing a round, or an investor who was in one? Tell us.
Quick answers about Spiral
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.
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