Blacksmith, which runs infrastructure companies use to build and test software including code written by AI, announced a $66 million Series C led by Sequoia Capital that values it at $1 billion, as reported by TechCrunch and Fortune. The round came about two months after a $45 million Series B at a $550 million valuation, and roughly a year after a $10 million Series A at $60 million, bringing total funding to $125 million. The company, whose customers it lists as Mercury and Granola, also said annual recurring revenue has grown 17-fold and that it has run more than 90 million CI jobs; co-founder and CEO Aditya Jayaprakash said most companies are struggling to keep up with the volume of CI they need to run as more code is written by AI.