Trunk

Trunk (trunk.io) sells a continuous-integration reliability platform aimed at two bottlenecks it identifies as limiting engineering velocity at scale: merge queue serialization and flaky test multiplication. Its two principal products are Trunk Merge Queue, which analyzes which code each pull request touches in order to create independent, parallel test lanes for non-overlapping changes, and Trunk Flaky Tests, which detects unreliable tests and quarantines them so false failures do not block pipelines. Customers typically adopt whichever product addresses their more urgent problem and expand from there.

The Flaky Tests product uses branch-aware detection (interpreting failures differently on main, pull requests, and merge queues), no-code quarantine from a dashboard with an optional auto-quarantine mode, continuous analysis of every pipeline execution rather than sampling, AI-generated error summaries and duplicate-failure grouping, in-PR test summaries, test status history, and ticketing integrations with Jira and Linear plus notification integrations such as Slack. The Merge Queue product provides intelligent batching of up to 100 PRs per CI run with automatic bisection to isolate the failing change, anti-flake protection (failed PRs remain in the queue and can merge if a later PR containing their code passes, combining optimistic merging and pending failure depth), predictive testing against the projected future state of main, parallel lanes that let hotfixes bypass the queue without cascade rebuilds, and API and webhook integrations for custom merge bots and workflow automation.

Trunk also maintains open-source developer tooling on GitHub, including a plugins repository that packages integrations for linters, formatters, security scanners, git hooks, and default configurations used by Trunk Code Quality, and a GitHub Action that runs Trunk Code Quality and posts inline annotations on pull requests.

Founding story

The about page states the company formed in 2021 with the goal of helping teams build software better and faster through a holistic developer experience toolkit. Eli Schleifer is listed as CEO/Founder (previously Uber, Google) and Matt Matheson as CTO/Founder (previously Uber, Microsoft).

Business model

Trunk sells software to engineering organizations, with a pricing page and a demo-booking motion on its website. Its GitHub Action documentation states that Trunk Code Quality is free for individual use, free for open source projects, and has a free tier for team use in private repositories, with paid options referenced via a pricing page. Specific pricing figures are not disclosed in the available sources.

Paid software subscriptions for teams alongside free tiers: Trunk Code Quality is stated to be free for individual use and for open source projects, with a free tier for private-repo team use and paid plans referenced through the company's pricing page.

Traction

Customer-reported outcomes cited by Trunk include Caseware reducing median merge time from six hours to 90 minutes while processing 4-8 PRs per batch, Zillow eliminating pipeline blockages from known flaky tests, and Faire preventing 20% of main-branch failures from green-green conflicts. Trunk states its merge queue has been validated at 250+ PRs per hour over 24-hour periods (6,000+ PRs/day) and that intelligent batching can reduce CI costs by up to 90%. Its open-source repositories show 166 stars/63 forks (plugins) and 248 stars/27 forks (GitHub Action).

Latest developments

Trunk's GitHub Action repository highlights Trunk Flaky Tests as a newer product that detects, quarantines, and eliminates flaky tests, and the website markets AI-powered failure analysis, webhook support, integrated Jira/Linear ticketing, and parallel merge queues. Open roles listed include Developer Marketing Lead, Tech Lead (CI & Test Data Platform), and Senior Software Engineer (Platform).