France · 
Who invested in ROSI?
ROSI's investors include Bpifrance, EIT InnoEnergy and EIC Accelerator.
20252026
?Venture$23MSeries B
France · Series B startup
Who invested in ROSI
Funding summaryUpdated 26 Oct 2026
$23Mraised across 2 rounds since 2024, from 2 sources
- Latest round
- Series B, $23MApr 2026
- Investors
- 3
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 Jul 2024
- Biggest round
- $23M Series B · Apr 2026
- Between rounds
- 21 months from the last two
The rounds
- Apr 2026
- Jul 2024
Founders and team
From ROSI's own website: 1 founder, 2 on the team.
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 ROSI
How much has ROSI raised?
ROSI has raised $23M across 2 rounds since 2024. One round did not disclose an amount, so the total is a floor.
When did ROSI last raise?
ROSI's most recent round was a Series B of $23M in Apr 2026.
What was ROSI's biggest round?
Its most recent round, $23M in Apr 2026, is also its largest on record.
Who backed ROSI first?
ROSI's first round on record, in Jul 2024, was backed by Bpifrance, EIC Accelerator and EIT InnoEnergy.
What stage is ROSI at?
ROSI's latest named round is a Series B, in Apr 2026.
Where is ROSI based?
ROSI is based in France.
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