Peak XV Partners-backed Blacksmith raises Series C funding at unicorn valuation

Blacksmith, a US-based infrastructure startup, has raised $66 million in a Series C funding round led by Sequoia Capital at a valuation of $1 billion.

The round also saw participation from Premji Invest and existing investors Peak XV Partners, GV and Y Combinator. With this round, Blacksmith’s total funding has reached $125 million.

The company will use the fresh capital to expand its team and computing infrastructure, with plans to increase its nearly 10 MW computing footprint across the US and Europe at least fivefold by 2027.

Founded in 2024 by Aditya “JP” Jayaprakash, Aayush Shah and Aditya Maru, Blacksmith provides infrastructure for building and testing software code. Its platform serves more than 10,000 companies, including LangChain, and the company claims its technology makes continuous integration (CI) jobs twice as fast at 60% lower costs on average.

"Since Claude Code took off in March, almost every conversation we've had with a large engineering team has started the same way. Developers who used to push three or four pull requests a day are now pushing orders of magnitude more and their CI infrastructure can't keep up," said Jayaprakash, co-founder and CEO of Blacksmith.

"JP and team understood early that as AI agents wrote more code, the infrastructure to build and test it would need to change," said Isaiah Boone, partner at Sequoia Capital.

Blacksmith previously raised $45 million in a Series B funding round led by Peak XV Partners in August 2026 at a $550 million valuation.

The funding comes amid rising demand for infrastructure that supports AI-powered software development, as companies seek faster and more cost-efficient ways to build, test and deploy code.