Blacksmith, a startup focused on streamlining the way companies build and test software—especially code generated by AI—has secured $66 million in a Series C funding round led by Sequoia, bringing its valuation to $1 billion and officially making it a unicorn. The round was revealed October 21, 2026.
The platform positions itself in the continuous integration (CI) space—a critical stage in software development where code changes are built, tested, merged, and validated—claiming that CI workflows have grown more challenging due to the rising volume of code being written by AI systems. The CEO explains Blacksmith was founded to make these CI processes less painful for engineering teams grappling with speed, scale, and trust concerns.
Rapid Growth, Milestones Hit
Blacksmith’s financial and usage metrics show a company scaling fast. Revenue has zoomed up 17 times over what it was prior, and the platform has processed over 90 million CI jobs—each job representing an automated code check. High-profile customers already onboard include Mercury and Granola.
This fundraising round comes just two months after Blacksmith closed on $45 million in a Series B that valued it at $550 million. A little over a year ago, its Series A raised $10 million at a $60 million valuation. Altogether, the company has now raised about $125 million to date.
Why This Matters
The big-picture here is that as software engineers increasingly rely on AI tools to write code—whether through agents, copilots, or automated systems—the burden on CI systems grows dramatically. Blacksmith aims to deliver scalable infrastructure and tooling that ensure fast feedback loops, reduce mistakes, and help teams keep up with the surge in code volume while maintaining trust.
Blacksmith joins a growing roster of AI-infrastructure startups capturing investor interest as automation becomes central to software teams. The $1B valuation reflects confidence in the business model: CI jobs rendered at scale, fast revenue growth, and a founder claiming the company solves a rising pain point.
Risks and Competition
Of course, automating CI isn’t new—plenty of established DevOps and CI/CD platforms like GitHub Actions, CircleCI, Jenkins, GitLab, and others already compete in the space. Their challenge will be matching Blacksmith in scaling CI workloads that are increasingly AI-driven. For Blacksmith, staying ahead requires not just processing power but also reliability and developer trust, especially when AI-written code must be validated and secured.
What Comes Next
With unicorn status secured, Blacksmith is likely to double down on product features and seek further enterprise customers who demand tighter compliance, security, and scaling. The AI-code trend isn’t going anywhere—and tooling that supports measured growth amid it may well become indispensable. What to watch: how Blacksmith integrates safety and trust into its operations, how fast it can grow ARR, and whether it builds defensible tech and community inside the CI/CD ecosystem.
What this move implies: Blacksmith’s rapid climb from a $60 million valuation just over a year ago to $1 billion today underscores how much investor appetite there is for solutions that tame the rising complexity of AI-accelerated software development. The company not only validates a growing narrative—that infrastructure and tooling are as critical as the AI models themselves—but sets the bar higher. As everyone tries to cope with ever-bigger volumes of code, the question shifts from just building faster to building better, safer, and more reliably. Blacksmith aims to be a standard-bearer in that race.
