Blacksmith Raises $66M Series C Led by Sequoia at $1B Valuation

Blacksmith, a platform for building and testing software, including AI-written code, raised a $66 million Series C led by Sequoia Capital at a $1 billion valuation, the company announced October 21, 2026. The round brings total funding to $125 million. The company says it will use the funds to grow its team and expand its compute footprint.