United States · 
Who invested in Siena AI?
Siena AI's investors include Sierra Ventures, York IE, Village Global, Superangel and Gapminder VC, and 3 more on record. York IE led its latest round.
20252026
$6.0MSeed$17MSeries A
United States · Series A startup
Who invested in Siena AI
Funding summaryUpdated 26 Oct 2026
$23Mraised across 2 rounds since 2024, from 2 sources
$6.0MSeed$17MSeries A
- Latest round
- Series A, $17MOct 2026
- Led by
- York IE
- Step-upi
- 2.8×
- Investors
- 8 (1 led)
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, $6.0M Sept 2024
- Biggest round
- $17M Series A · Oct 2026
- Between rounds
- 2.1 years from the last two
The rounds
- Oct 2026Series A$17M4 new1 returning
Reported by The Recursive
- Sept 2024
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
Aglaé VenturesCorporate VC1round
Joyance VenturesVC firm1round
Missing a round, or an investor who was in one? Tell us.
Quick answers about Siena AI
How much has Siena AI raised?
Siena AI has raised $23M across 2 rounds since 2024.
When did Siena AI last raise?
Siena AI's most recent round was a Series A of $17M in Oct 2026, led by York IE.
What was Siena AI's biggest round?
Its most recent round, $17M in Oct 2026, is also its largest on record.
Who backed Siena AI first?
Siena AI's first round on record, in Sept 2024, was backed by Village Global, Sierra Ventures and Superangel and 1 others.
What stage is Siena AI at?
Siena AI's latest named round is a Series A, in Oct 2026.
Where is Siena AI based?
Siena AI is based in the United States.
Who led Siena AI's rounds?
York IE led the Series A in 2026.
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