Blacksmith hits $1 billion valuation with $66 million Series C led by Sequoia

Blacksmith's rise has been swift. The company announced its $66 million Series C just two months after a $45 million Series B that valued it at $550 million. A year ago, it was valued at $60 million following a $10 million Series A, and it has raised $125 million to date.

At the center of the pitch is continuous integration, the process of building, testing, merging, and validating code changes. Co-founder and CEO Aditya Jayaprakash said Blacksmith was founded to make that process "less painful," and he pointed to the strain companies face keeping up with the volume of CI they need to run, particularly as more code is written by AI. He framed the central question as whether software written by agents can be trusted.

The company says its annual recurring revenue has grown 17x and that it has run over 90 million CI jobs, with customers including Mercury and Granola. Those figures suggest demand is coming from teams that need to validate a growing stream of code changes, though the body does not break out revenue or customer counts.