Firstbase

Y Combinator

Latest funding

Series B+ · March 25, 2022

Amount not disclosed in a source on record.

Acquired by HHarbor Compliance on December 10, 2025.

Website: firstbase.io.

Sectors: B2B, Operations, SaaS, LegalTech.

Stage: Series B+.

Based in: New York City, United States.

Last round: Mar 25, 2022 · 1,693 days ago.

Team: 50 people on the team page.

On Recent Funding since: Sep 28, 2026.

Signals

Website registeredMay 29, 2018 (8 years old)

Sources and API

Every amount links to the page it came from. * Estimated from an accelerator's published standard deal, not a company-specific disclosure. How Recent Funding sources and verifies funding data. The same data as JSON: /api/v1/companies/firstbase-io (get a free API key).