Blacksmith

Based in San Francisco, California, Blacksmith provides a continuous integration and continuous delivery service that facilitates code deployment by optimizing GitHub Actions workflows across a fleet of bare-metal gaming CPUs. The enterprise software platform requires only a single-line code change to integrate build caches directly next to continuous integration jobs, addressing the unpredictable testing stages of software releases. The venture-backed company has raised $13.5 million in total capital, including a recent Series A round, while scaling to $3.5 million in annual recurring revenue with an eleven-person team. Blacksmith is backed by lead investor Google Ventures and provides infrastructure solutions to a portfolio of more than 700 customers, including notable technology organizations such as Ashby, Finch, and Clerk. The Y Combinator alumni company was founded in 2024 by Aditya Jayaprakash, Aayush Shah, and Aditya Maru.

High-Level Overview

Blacksmith is a high-performance cloud platform built to accelerate continuous integration (CI) for engineering teams using GitHub Actions. Its core product enables companies to run their CI workflows up to twice as fast and at half the cost by leveraging a hardware-software stack purpose-built for CI, powered by gaming-grade CPUs and optimized orchestration. Blacksmith serves software development teams frustrated by slow, expensive, and unreliable CI pipelines, particularly those working in fast-moving environments like AI, infrastructure, and SaaS. The company has rapidly gained traction, processing over 12 million jobs monthly, serving more than 800 organizations—including Ashby, Chroma, Clerk, Supabase, and VEED—and growing its annual recurring revenue (ARR) to $1M, with revenue tripling in just four months. Backed by Google Ventures and Y Combinator, Blacksmith is positioned as a critical enabler for modern engineering velocity.

Origin Story

Blacksmith was founded in 2024 by three University of Waterloo graduates—Aayush Shah, Aditya Maru, and Aditya Jayaprakash (JP)—who met while studying computer science and later worked at leading tech companies like Cockroach Labs and Faire. Their experience building and scaling distributed systems gave them firsthand insight into the bottlenecks and inefficiencies of traditional CI platforms. Recognizing that CI runtimes were growing quadratically with codebases and test suites, and that platforms like GitHub Actions were using outdated hardware with little incentive to optimize, they set out to build a solution that would make CI truly fast and cost-effective. After launching out of Y Combinator’s Winter 2024 batch, Blacksmith quickly attracted early adopters and achieved rapid growth, validating its approach and securing a $10M Series A led by Google Ventures.

Core Differentiators

• Speed & Performance: Runs GitHub Actions up to 2x faster by using high-performance gaming CPUs and a software stack optimized for CI workloads.
• Cost Efficiency: Cuts infrastructure costs by half compared to hyperscaler-based solutions, passing savings directly to customers.
• Ease of Adoption: Requires only a one-line change in workflow files and installation of a GitHub app—no major migration or re-architecture.
• Observability & Analytics: Provides unified, searchable views of test results, instant failure diagnosis, and analytics to identify flaky tests and infrastructure issues.
• Developer Experience: Eliminates queue times, accelerates cache downloads (4x faster), and speeds up Docker builds (40x faster).
• Community & Ecosystem: Trusted by leading startups and backed by prominent angels like Kelsey Hightower and Spencer Kimball.

Role in the Broader Tech Landscape

Blacksmith is riding the wave of AI-driven development, where rapid iteration and reliable CI are essential for competitiveness. As AI agents and automated code generation become more prevalent, the demand for fast, observable, and scalable CI infrastructure is exploding. Blacksmith’s timing is ideal: legacy CI platforms are struggling to keep up with the pace of modern software development, and engineering teams are increasingly unwilling to accept slow, opaque pipelines. By focusing on the developer experience and infrastructure efficiency, Blacksmith is helping to unlock the full potential of AI-powered engineering, enabling teams to merge code faster and ship features more reliably. Its success also signals a broader shift toward specialized, high-performance cloud infrastructure tailored to specific workloads—not just generic compute.

Quick Take & Future Outlook

Blacksmith is poised to become the de facto compute layer for CI, much like AWS EC2 is for general cloud compute. With its recent funding, the company is expanding its engineering and go-to-market teams, opening offices in San Francisco and New York, and building out its observability stack to address more pain points in the developer workflow. As CI becomes even more critical in the age of AI and autonomous agents, Blacksmith’s focus on speed, cost, and clarity will only grow in importance. The company’s vision to expand beyond GitHub Actions to other CI platforms like GitLab and Jenkins could further cement its role as a foundational layer in the modern software development stack. Blacksmith’s rise is a testament to the power of solving a universal pain point with a simple, elegant solution—making CI something developers look forward to, not dread.