United States · 
Who invested in Sieve?
Sieve's investors include Y Combinator and Clocktower Ventures.
2023202420252026
$4.0MSeed?VentureUnited States · Venture startup
Who invested in Sieve
Funding summaryUpdated 26 Oct 2026
$4.0Mraised across 2 rounds since 2022, from 2 sources
- Latest round
- VentureJan 2026
- Biggest round
- $4.0MSeed · Nov 2022
- Investors
- 2
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, $4.0M Nov 2022
- Biggest round
- $4.0M Seed · Nov 2022
- Between rounds
- 3.2 years from the last two
The rounds
- Jan 2026
- Nov 2022
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 Sieve
How much has Sieve raised?
Sieve has raised $4.0M across 2 rounds since 2022. One round did not disclose an amount, so the total is a floor.
When did Sieve last raise?
Sieve's most recent round was a Venture in Jan 2026.
What was Sieve's biggest round?
Sieve's largest round on record is $4.0M (Seed), in Nov 2022.
Who backed Sieve first?
Sieve's first round on record, in Nov 2022, was backed by Y Combinator.
What stage is Sieve at?
Sieve's latest named round is a Venture, in Jan 2026.
Where is Sieve based?
Sieve is based in the United States.
Companies like Sieve
In the same sector, and raised in the last eighteen months.
Find investors like these
Search every investor by what they have actually funded, then narrow to your stage and market. Free.