The problem: red CI, wasted engineers
Trunk was founded in 2021 in San Francisco by engineers from Uber, Google, and YouTube who were tired of clicking "re-run" on flaky CI pipelines. The company's thesis is that AI code generation makes CI throughput the new bottleneck — so it builds the AI DevOps layer that keeps merges flowing.
Products
Flaky Tests is Trunk's flagship: it detects unreliable tests across any language, test runner, or CI provider, automatically quarantines them so they stop blocking merges, tracks flakiness metrics over time, and uses AI-powered failure analysis to point at root causes. Tickets can be filed automatically into Linear or Jira. The Merge Queue product upgrades GitHub's merge workflow with anti-flake protection, intelligent batching of up to 100 PRs, parallel queue lanes, and auto-bisection to find the exact change that broke main. Teams like Faire, Brex, and Gusto use it to keep high-velocity monorepos shippable.
Funding
Trunk raised a $25M Series A co-led by Initialized Capital and Andreessen Horowitz, with angels including GitHub founder Tom Preston-Werner and Algolia's Nicolas Dessaigne. It is one of the few dev-infra startups attacking test reliability — the unglamorous half of AI-accelerated software delivery.