As AI accelerates software development, testing and validating the surge in generated code has become the industry's next critical hurdle. Blacksmith, a startup tackling this challenge, has secured $45 million in new funding to capitalize on the trend.
Funding and Valuation Surge
The Series B round, led by Peak XV Partners, values Blacksmith at $550 million—a dramatic jump from the $60 million valuation set during its $10 million Series A less than a year ago. Existing investors GV and Y Combinator also participated, bringing the company's total funding to $58.5 million.
Rapid Growth and Adoption
Founded in 2024, Blacksmith helps companies build, test, and verify software before production deployment. The startup now serves over 5,000 customers, including Mercury, Supabase, Clerk, Ashby, and Expensify—up from just 700 customers a year ago, according to co-founder and CEO Aditya Jayaprakash in an exclusive interview.
The proliferation of AI coding tools like Cursor, OpenAI's Codex, and Anthropic's Claude Code has made code generation significantly easier, but quality remains uncertain. "Validating code is still a bottleneck, and it's an even bigger bottleneck because people are writing even more," Jayaprakash explained.
Platform Evolution
Blacksmith initially launched as a cloud provider for continuous integration (CI) workloads, enabling companies to run builds and tests efficiently. The platform has since expanded with Codesmith, an AI coding agent that automatically fixes failed checks—a key differentiator in a crowded market.
Jayaprakash noted that Blacksmith achieved $10 million in annualized revenue run rate (ARR) with just 10 employees. The team has since grown to about 30 people, with revenue reaching "tens of millions of dollars." While he declined to disclose a specific updated ARR figure, he confirmed that several largest customers now spend over $1 million annually.
Competitive Landscape
Blacksmith operates in a fiercely competitive space, facing rivals such as GitHub Actions, Cursor Automations, validation features in Codex and Claude Code, and AI testing services from AWS, Microsoft Azure, and Google Cloud. Jayaprakash says the startup competes on both testing speed and affordability.
Future Plans
Looking ahead, Blacksmith aims to expand into a broader suite of coding tools, helping developers write, validate, and merge software faster. As AI-generated code continues to grow, the demand for robust validation is set to intensify—positioning Blacksmith for further momentum heading into 2026.
via TechCrunch