Blacksmith: YC W24 CI cloud for faster GitHub Actions

Blacksmith@ycombinatorNov 2, 2026

Blacksmith (W24) is building a faster cloud for continuous integration (CI), helping developers test and ship code as AI coding tools generate more of it. As software production accelerates, testing and validation are becoming the new bottleneck. That shift has helped https://t.co/RsMoAUpjw4

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Launched Nov 2, 2026View post

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We raised a $45M Series B led by Peak XV, with YC and GV tripling down. Blacksmith is now valued at $550M. We closed this back in March. CI volume is up 5-10% every week as codegen makes writing code easy and validating it the bottleneck. 6,000+ companies run CI on us. What's https://t.co/ybIIo7sGI4

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Blacksmith, a platform that lets companies build and test AI code more effectively, just announced a $66 million Series C round led by Sequoia that values the company at $1 billion. https://t.co/1JWiylNvgf

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