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- Business
Compute Hostingand 1 more business valuesLess
- Software Applications
- Market
- Software Development
- Ecosystem
- Agents
- Customers
Developersand 1 more customers valuesLess
- Enterprises
More details
- Organization type
- Commercial Company
- Ecosystem
- Agents
- Business
- Compute Hosting, Software Applications
- Specialization
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- Market
- Software Development
- Customers
- Developers, Enterprises
- Delivery models
- Managed Compute
- Revenue models
- Usage Based
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- Seed
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About
StarSling builds AI-native continuous integration infrastructure for GitHub Actions, combining drop-in Ubuntu runners with agents that identify and open optimization pull requests. It sells to startups and fast-moving engineering teams, differentiating through faster, lower-cost CI and automated workflow improvements rather than runners alone.
Market
StarSling competes in the hosted CI/CD infrastructure and DevOps automation market, specifically as a faster alternative to GitHub-hosted runners for GitHub Actions. It positions itself as AI-native or “self-driving” CI by combining managed Linux runners with agents that continuously identify and submit workflow improvements. Its differentiation is the combination of faster AMD EPYC infrastructure, unlimited concurrency and usage-based pricing with automated, reviewable CI optimization PRs—capabilities traditional hosted runners generally do not provide.
Startups and fast-moving engineering teams that use GitHub Actions and need faster, more cost-efficient CI. The likely buyers are engineering, DevOps, and platform leaders responsible for CI performance, reliability, and infrastructure spend.
At a Glance
Problem
StarSling targets the time, cost, and engineering-attention burden of continuous integration for fast-moving teams using GitHub Actions. Its founders say developers typically lose about 20% of their day to non-coding DevOps work, including investigating pipelines and fixing exceptions. As repositories, test suites, and parallel jobs grow, slow runners, queueing, redundant work, and poorly optimized workflows turn CI into a release bottleneck as well as a recurring compute expense.
The clearest use case is a startup with a large or rapidly expanding test matrix that cannot justify having engineers continually tune CI infrastructure. Better Auth reports that StarSling made its end-to-end tests more than twice as fast while saving about 20,000 CI minutes per month, while Partcl reports 13-times-lower cost per run on its heaviest jobs and a 16-times reduction in queue time as its daily CI volume grew roughly sixfold.
Product / Service
StarSling Runners are an AI-native, drop-in alternative to GitHub-hosted Ubuntu runners rather than a new CI syntax. A team installs the StarSling GitHub App and changes the runner label in an existing workflow; its GitHub Actions syntax, actions, secrets, permissions, and review process remain intact. Jobs run on faster AMD EPYC-backed Linux infrastructure with unlimited concurrency, zero-config compatibility with actions/cache, and single-use, hardware-isolated microVMs.
The differentiator is the optimization layer. StarSling agents continuously inspect workflows, job logs, and machine telemetry, then open pull requests that can fix caching, accelerate dependency installation, parallelize or shard tests, remove redundant work, and restructure slow build steps. The service is usage-based: new accounts receive 2,000 free minutes, 4-vCPU Linux runners cost $0.008 per minute, queue time is not billed, and there are no seat fees. This combines an immediate infrastructure benefit with an ongoing effort to keep the pipeline from becoming slow again.
Market
StarSling competes in B2B developer tools and DevOps, specifically hosted GitHub Actions runner infrastructure augmented with AI-based CI optimization. The immediate alternatives are GitHub-hosted runners, self-hosted runner fleets, and specialized faster-runner providers such as Blacksmith, which also markets faster GitHub Actions hardware and lower operating costs. StarSling's positioning is that conventional fast-runner providers improve the machine, whereas its agents also improve the workflow itself.
The company is commercially launched rather than merely pre-product: StarSling Runners reached general availability on June 29, 2026, with self-serve usage-based pricing. Before launch, the company says it ran more than one million CI jobs during a four-month private beta for teams including Better Auth, Mastra, and Partcl, and it publishes customer results ranging from materially faster tests to lower compute costs. Public materials do not disclose revenue, so StarSling's revenue status and market share cannot be determined, but the available evidence shows early paid-product traction and named design customers rather than a pre-revenue concept only.
Founders & Leadership
Funding History
Y Combinator
Eight Capital Management
Recent News
Y Combinator’s Launch YC featured StarSling Runners as an AI-native drop-in replacement for ubuntu-latest, with AI agents that continuously optimize CI; the post claimed up to 6× faster and 13× cheaper. It also reported more than one million CI jobs and named Better Auth, Mastra, and Partcl among teams using the product.
StarSling announced the launch of Review Runners in private beta. The product lets teams run their own models, review skills, scripts, and reviewer configurations as GitHub Actions jobs on pull requests.
StarSling announced a $3 million pre-seed round led by Bessemer Venture Partners and Y Combinator, with participation from Vermilion Cliffs Ventures, Precursor Ventures, Cervin Ventures, Outset Capital, and Transpose Platform. The company said it would use the funding for compute and to hire founding engineers in the San Francisco Bay Area.
On August 13, 2026, StarSling announced ci-secure, a free and open-source AI coding-agent skill for GitHub Actions. The tool scans workflows for ten critical CI/CD attack vectors and gives developers fixes to review and apply locally.
StarSling introduced its AI-native drop-in replacement for GitHub-hosted Ubuntu runners. Its agents scan CI setups and open optimization changes, with the company reporting that Better Auth and Mastra achieved 82% faster GitHub Actions after switching.
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Get notified when they postBusiness Model
StarSling charges customers based on runner usage: new accounts receive 2,000 free minutes in the first month, after which 4-vCPU/16-GB Linux runners cost $0.008 per minute. Its offering emphasizes self-serve runners with no seat fees, while additional plans or enterprise revenue streams are not specified in the available evidence.