AI code testing platform Blacksmith raises $45 Mn in Series B led by Peak XV

AI code testing platform Blacksmith has raised $45 million in Series B funding at a valuation of $550 million. The round was led by Peak XV Partners, with participation from existing investors Google Ventures (GV) and Y Combinator, taking the startup’s total funding to $58.5 million. The proceeds will be used to expand into a broader suite of coding tools and help developers write, validate, and merge software faster, Blacksmith said in a press release. Co-founded in 2024 by Aditya Jayaprakash, Aayush Shah, and Aditya Maru, Blacksmith provides a cloud platform for running GitHub Actions continuous integration (CI) workflows. The startup claims its platform can run CI workflows up to twice as fast at half the cost. Blacksmith now serves more than 5,000 customers, including Mercury, Supabase, Clerk, Ashby, and Expensify, up from more than 700 customers less than a year ago. The startup initially focused on CI workloads, helping companies run software builds and tests to validate code before it reaches production. It has since expanded into AI-powered coding tools with Codesmith, an AI coding agent that can automatically fix failed code checks. Blacksmith competes with GitHub Actions, Cursor Automations, and coding and validation capabilities offered by Codex and Claude Code. It also faces competition from AI code testing tools offered by Amazon Web Services, Microsoft Azure, and Google Cloud. India’s AI-powered software testing segment is also seeing more activity as enterpris…