Blacksmith, a startup specializing in automated code testing infrastructure, has reached a valuation of $1 billion following a Series C funding round. The round raised approximately $66.26 million and was led by Sequoia Capital.
This latest investment comes roughly two months after the company secured $45 million in Series B funding at a valuation of $550 million. Total funding for the startup now stands at approximately $124.5 million.
The company's revenue has grown from single-digit millions to tens of millions, with some enterprise clients spending over $1 million annually. The customer base expanded from 800 in late 2025 to over 5,000.
Founded in 2024 in San Francisco by Aditya Jayaprakash, Aayush Shah, and Aditya Maru, the company provides cloud-based runners and caching tools for CI workloads. It also offers an AI agent called Codesmith.
Since early 2026, the volume of CI jobs processed by Blacksmith has increased by 5% to 10% weekly. The startup currently employs approximately 30 people, up from an initial team of 10.
