Blacksmith
Category: AI Developer Tools
Blacksmith is a continuous integration (CI) platform that speeds up GitHub Actions. Blacksmith was founded in 2024. The company is led by Aditya Jayaprakash. Based in San Francisco, USA. Team size: 11-50. Total funding raised: $58.5M. Latest round: Series B. Key investors include Peak XV Partners, Google Ventures (GV), Y Combinator, Spencer Kimball, David Cramer, Garry Tan, Thomas Dohmke.
- Founded
- 2024
- Headquarters
- San Francisco, USA
- Team size
- 11-50
- Total funding
- $58.5M
Value proposition
Run GitHub Actions up to 2x faster at half the cost, improving developer productivity and reducing CI/CD costs.
Products and solutions
Fast CI for GitHub Actions, GitHub Actions Analytics, Logging platform for GitHub Actions, Support for Matrix Builds, Persistent Docker layer caching, Blacksmith Sandboxes (for coding agents), Container Caching, Mac Runners (M4 Pro)
Unique value
A hardware-software stack purpose-built for CI, using high-performance gaming CPUs and NVMe drives to accelerate GitHub Actions.
Target customer
Mid-sized to large engineering teams using GitHub Actions for their CI/CD pipelines.
Industries served
Technology, Software Development, AI/ML
Technology advantage
A vertically integrated solution that combines a custom hardware stack with a software platform optimized for CI, providing significant performance and cost advantages over standard GitHub Actions runners. Their analytics and logging features also offer superior visibility into CI/CD pipelines.
How they differentiate
Blacksmith differentiates by providing a high-performance CI cloud that significantly speeds up GitHub Actions. It focuses on eliminating build queues and accelerating various CI/CD tasks, such as caching and Docker image builds, to enhance developer productivity.
Main competitors
Depot, WarpBuild, GitHub Actions, Buildkite, Namespace
Key partnerships
Peak XV Partners, Google Ventures, Y Combinator
Notable customers
Supabase, Clerk, Ashby, Mercury, Expensify, Veed, Chroma, Pylon, Finch, Plex
Major milestones
Accepted into and graduated from the Y Combinator accelerator program., Successfully raised a $3.5M seed funding round., Secured a $10M Series A funding round just four months after its seed round., Raised $45M Series B led by Peak XV Partners at a $550M valuation (closed March 2026; announced August 2026)., Launched Codesmith, a cloud coding agent integrated with CI validation.
Growth metrics
6,000+ companies run CI on Blacksmith; tens of millions in revenue (from ~$10M ARR run-rate); ~30 employees; CI jobs growing 5–10% week-over-week in 2026; 30,000+ developers; 50M+ jobs processed monthly.
Market positioning
Blacksmith is positioned as a specialized solution for developers and organizations using GitHub Actions, particularly those in the AI and technology sectors that require faster and more efficient CI/CD pipelines. It aims to be the leading choice for high-performance, scalable CI infrastructure.
Geographic focus
Primarily targeting the North American market, but with a global reach given its remote-friendly operations and the nature of software development.
Patents and IP
Not publicly available
About Aditya Jayaprakash
Previously a founding engineer on the ads team at Faire (YC W17) where he worked on search infra and ads. He led retrieval and targeting and helped grow ads from 0 to $XM. Graduated from University of Waterloo (CS) with a Master's from University of Alberta (Theoretical CS research).
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Official website: https://www.blacksmith.sh/