- Blacksmith says its Series B valued the company at $550 million and will fund a major expansion of its computing footprint. [1] - The startup says more than 6,000 companies now run continuous-integration workloads on its platform. [1] - TechCrunch reported that Blacksmith’s revenue grew more than tenfold over the past year, a company claim that was not accompanied by a disclosed revenue figure.
[2] Blacksmith has raised $45 million in a Series B at a $550 million valuation as AI coding tools increase the volume of software that engineering teams must test and validate. The round was led by Peak XV Partners, with GV and Y Combinator, which backed earlier rounds, participating. [1]
The San Francisco startup raised its seed round of $3.5 million in May 2025, led by GV and Y Combinator, followed by a $10 million Series A led by GV in September 2025. [3][4]
A faster layer for GitHub Actions #
Blacksmith provides hosted infrastructure for GitHub Actions, the continuous-integration system used to build and test code. It says its bare-metal deployment uses high-performance gaming CPUs and locally controlled storage to deliver faster runs and lower compute costs than generic cloud infrastructure. The company markets the service as a drop-in replacement that can be adopted with a workflow change. [1][5]
That places Blacksmith alongside established CI and software-validation providers including GitHub Actions, CircleCI and Buildkite. Those companies are also adding test optimization, observability and AI-assisted failure resolution as coding agents produce more changes. [5][6]
Companies mentioned #
Further sources #
[1] Blacksmith announced a $45 million Series B led by Peak XV Partners, said the r… ↗ [2] TechCrunch reported Blacksmith’s claim that revenue had grown more than tenfold… ↗
[3] Blacksmith announced its $3.5 million seed round in May 2025, led by GV and Y C… ↗ [4] Blacksmith announced a $10 million Series A led by GV in September 2025, with e… ↗
[[5] Blacksmith describes its product as a faster, lower-cost drop-in replacement fo… ↗](https://www.blacksmith.sh/)
[[6] CircleCI and Buildkite describe competing test optimization, observability and … ↗](https://circleci.com/product/)
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