StarSling raises $3M pre-seed and launches Review Runners
What's the deal? StarSlingDealroom has a profile for this one. Try Dealroom → (YC X25) has raised US$1.94M pre-seed round from Bessemer Venture Partners and Y Combinator, alongside the launch of StarSling Review Runners, its agent-native code-review product now in private beta. The company says the raise will make shipping code agent-native, taking on both gates of modern delivery: CI and code review.
The product: Review Runners run your model, your repository's review skills and scripts, and your team's defined reviewers as GitHub Actions jobs on every pull request, before a human opens it. Engineers bring their own provider key, so token costs stay with the provider they already use. Reviewer skills and instructions load from the trusted base branch immediately before the model runs, so a pull request cannot rewrite the reviewer evaluating it; the job holds a read-only token and a separate step publishes the review.
Why it matters: StarSling's first product, CI Runners, are a drop-in replacement for GitHub Actions' default ubuntu-latest runners, claiming roughly 30% faster runs on current-generation AMD EPYC hardware. Its agents continuously analyze workflows, run logs and machine telemetry, then open pull requests that repair caching, speed up dependency installs, parallelize build steps and shard test suites. Across the platform it says it has run over 2 million CI jobs, made CI up to 6x faster and up to 13x cheaper,and saved customers including Mastra and Vercel's Better Auth team over 28,000 hours in compute. Review Runners extends that loop to code review, where hosted bots still force engineers to repeat themselves in every pull request.
The team: The company was founded by Yonas BeshawredDealroom has a profile for this one. Try Dealroom →, who announced the round and product on X on ạ22 September 2026. The raise backs StarSling's thesis that once code is written, the bottleneck shifts to verifying it: CI and review,and that both gates should become agent-native.
Read more: StarSling blog · Yonas Beshawred on X
