Fundz

Blacksmith raises $45M Series B led by Peak XV Partners as AI tools drive demand for faster code validation, boosting its customer base from 800 to over 6,000.

PRIVATEAug 12, 2026

Amount Raised

$45 Million

Round Type

Series B

San FranciscoSoftware

Investors

GVY CombinatorPeak XV Partners

Description

Blacksmith, a cloud platform for validating code, has secured $45 million in a Series B funding round led by Peak XV Partners. Existing investors Y Combinator and GV also participated in the round, which values the company at $550 million. The funding comes as demand for faster code validation surges, with Blacksmith experiencing significant growth in its user base in recent months. The investment will help enhance Blacksmith's infrastructure to meet the increasing needs of engineering teams.

Company Information

Company

Blacksmith

Location

San Francisco, California, United States

About

Blacksmith makes CI faster, more cost-effective, and more reliable by avoiding hyperscaler-based solutions and running GitHub Actions on high-performance hardware with gaming-grade CPUs — tuned for maximum throughput and enhanced with growing observability capabilities. This approach eliminates build bottlenecks, lowers infrastructure costs, and gives teams a clear view into pipeline health. In the AI era, where rapid iteration is critical, Blacksmith keeps development cycles moving — enabling faster validation, safer deployments, and more competitive release schedules. Founded in 2024 by engineers from Faire and Cockroach Labs, Blacksmith is backed by Google Ventures, Y Combinator, and leading dev infrastructure angels.

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Funding Insights

What this usually means
Timeline to next round
Series B companies typically work for 15-20 months before raising new capital
Growth expectations
Series B companies are expected to scale rapidly and expand market reach

Blacksmith raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.

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