Blacksmith Hits $1 Billion Fast

Blacksmith said on 21 October 2026 that it had raised a $66 million Series C led by Sequoia, a round that values the company at $1 billion and turns a quiet piece of software plumbing into the latest AI-era growth story.

The company builds tools for continuous integration, usually shortened to CI: the automated work of building, testing, merging and validating code changes before they reach users. It is not glamorous, but it sits in the path between a programmer writing software and a business trusting that software enough to ship it.

That trust problem is the point Blacksmith is selling. In a company post released with the funding news, co-founder and chief executive Aditya Jayaprakash argued that many companies are struggling to keep up with the amount of CI they need to run, especially as AI systems generate more code. If software can be produced faster than it can be checked, the bottleneck moves from writing to verification.

The speed of Blacksmith’s valuation rise helps explain why investors care. TechCrunch reported that the company was valued at $550 million in its Series B, raised two months before this round, and at $60 million after its Series A a year earlier. Blacksmith says it has now raised $125 million in total.

Some of the numbers behind the pitch come from the company itself rather than public filings. Blacksmith said annual recurring revenue has grown 17-fold and that its systems have run more than 90 million CI jobs, meaning individual automated checks on code. It also named Mercury and Granola as customers.

What is established is narrower than the rhetoric around AI and software often suggests. Blacksmith has announced fresh capital, a unicorn valuation and a business aimed at a real pressure point in software development. What remains unproven from the outside is how durable that growth will be, and whether the broader market for AI-assisted coding will reward the companies that generate code or the ones that make it safer to trust.

For engineers, this category matters because errors in code are rarely abstract. They can break payroll systems, hospital scheduling software, banking apps and the ordinary digital machinery people are asked to rely on without seeing how it was built. Blacksmith is betting that in an age of abundant code, scrutiny becomes the scarcer product.