Blacksmith raises $45M to validate AI-written code

Blacksmith raised a $45 million Series B at a $550 million valuation, with the continuous-integration company saying AI coding tools are driving more validation work. Blacksmith’s announcement says more than 6,000 companies now run CI on its service, jobs have grown 5–10% week over week since the start of 2026, and its compute footprint should expand tenfold. Builders scaling agentic engineering practices should file the inversion away: faster code generation makes the test-and-merge bottleneck, not the editor, the infrastructure market.