United States · 
Who invested in OpenBuilder?
OpenBuilder's investors include Y Combinator.
United States · Pre-seed startup
Who invested in OpenBuilder
One round we have observed, with the one investor named in it. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.
Raised 11 months ago
Funding summaryUpdated 26 Oct 2026
$500Kraised across 1 round since 2025, from 1 source
- Latest round
- Pre-seed, $500KDec 2025
- Investors
- 1
The rounds
- Dec 2025
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
These 3 firms list OpenBuilder as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Quick answers about OpenBuilder
How much has OpenBuilder raised?
OpenBuilder has raised $500K across 1 round since 2025.
When did OpenBuilder last raise?
OpenBuilder's most recent round was a Pre-seed of $500K in Dec 2025.
What was OpenBuilder's biggest round?
Its most recent round, $500K in Dec 2025, is also its largest on record.
Who backed OpenBuilder first?
OpenBuilder's first round on record, in Dec 2025, was backed by Y Combinator.
What stage is OpenBuilder at?
OpenBuilder's latest named round is a Pre-seed, in Dec 2025.
Where is OpenBuilder based?
OpenBuilder is based in the United States.
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