France · 
Who invested in Piston?
Piston's investors include Spark Capital, Pear VC, Bond, Kima Ventures and Daphni, and 2 more on record.
2026
$6.1MSeed$3.5MSeed$15MSeries A
France · Series A startup
Who invested in Piston
Funding summaryUpdated 26 Oct 2026
$25Mraised across 3 rounds since 2025, from 3 sources
$6.1MSeed$3.5MSeed$15MSeries A
- Latest round
- Series A, $15MSept 2026
- Step-upi
- 4.3×
- Investors
- 7
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Seed, $6.1M Jun 2025
- Biggest round
- $15M Series A · Sept 2026
- Usual gap between rounds
- 9 months the median of 2
The rounds
- Sept 2026Series A$15M1 new3 returning
Source recordedSEC filing: $15M sold
- Mar 2026
- Jun 2025
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.
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Quick answers about Piston
How much has Piston raised?
Piston has raised $25M across 3 rounds since 2025.
When did Piston last raise?
Piston's most recent round was a Series A of $15M in Sept 2026.
What was Piston's biggest round?
Its most recent round, $15M in Sept 2026, is also its largest on record.
Who backed Piston first?
Piston's first round on record, in Jun 2025, was backed by Spark Capital, Pear VC and Bond.
What stage is Piston at?
Piston's latest named round is a Series A, in Sept 2026.
Where is Piston based?
Piston is based in France.
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