Blacksmith raises $45 million at $550 million valuation for AI-era code validation

Blacksmith raised $45 million in a Series B round led by Peak XV Partners, valuing the San Francisco startup at $550 million as AI coding tools increase the volume of software requiring validation. The company, which provides hosted infrastructure for GitHub Actions, says more than 6,000 companies now run continuous-integration workloads on its platform, and it claims revenue grew more than tenfold over the past year.

Blacksmith raises $45 million at $550 million valuation for AI-era code validation - Blacksmith says its Series B valued the company at $550 million and will fund a major expansion of its computing footprint. 1 https://www.blacksmith.sh/blog/announcing-blacksmiths-series-b-led-by-peak-xv-partners - The startup says more than 6,000 companies now run continuous-integration workloads on its platform. 1 https://www.blacksmith.sh/blog/announcing-blacksmiths-series-b-led-by-peak-xv-partners - 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 https://techcrunch.com/2026/08/12/blacksmiths-valuation-jumps-10x-to-550m-as-ai-coding-fuels-software-validation/ 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 https://www.blacksmith.sh/blog/announcing-blacksmiths-series-b-led-by-peak-xv-partners 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 https://www.blacksmith.sh/blog/blacksmith-seed-announcement 4 https://techcrunch.com/2025/09/17/google-ventures-doubles-down-on-dev-tool-startup-blacksmith-just-4-months-after-its-seed-round/ 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 https://www.blacksmith.sh/blog/announcing-blacksmiths-series-b-led-by-peak-xv-partners 5 https://www.blacksmith.sh/ 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 https://www.blacksmith.sh/ 6 https://circleci.com/product/ Companies mentioned Further sources 1 Blacksmith announced a $45 million Series B led by Peak XV Partners, said the r… ↗ https://www.blacksmith.sh/blog/announcing-blacksmiths-series-b-led-by-peak-xv-partners 2 TechCrunch reported Blacksmith’s claim that revenue had grown more than tenfold… ↗ https://techcrunch.com/2026/08/12/blacksmiths-valuation-jumps-10x-to-550m-as-ai-coding-fuels-software-validation/ 3 Blacksmith announced its $3.5 million seed round in May 2025, led by GV and Y C… ↗ https://www.blacksmith.sh/blog/blacksmith-seed-announcement 4 Blacksmith announced a $10 million Series A led by GV in September 2025, with e… ↗ https://techcrunch.com/2025/09/17/google-ventures-doubles-down-on-dev-tool-startup-blacksmith-just-4-months-after-its-seed-round/ 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/ The stories that matter, in one email. Free — unsubscribe anytime.