# Trunk

> Trunk is a San Francisco developer-tools company building a suite that keeps continuous integration reliable at scale. Its two flagship products - a parallel Merge Queue that batches and tests many pull requests at once, and Flaky Tests, which automatically detects and quarantines unreliable tests - target the bottlenecks that slow engineering teams as they ship more code, increasingly with AI assistance. Founded in 2021 by ex-Uber and ex-Google engineers, Trunk raised a $25M Series A led by Initialized Capital in 2022 and counts Brex, Faire, Zillow, and Gusto among its users.

- **Founded:** 2021
- **Headquarters:** San Francisco, California, United States
- **Founders:** Eli Schleifer (Co-founder & CEO (previously CTO at Directr/acquired by Google; YouTube, Uber, Microsoft)), David Apirian (Co-founder), Chris Clearwater (Co-founder), Matt Matheson (Co-founder (previously Uber, Microsoft))
- **Team size:** ~63 employees
- **Products:** Merge Queue, Flaky Tests, CI Analytics & Failure Analysis, Trunk Code Quality / CLI
- **Notable:** Raised $25M Series A in April 2022, bringing total funding to ~$28.5M, Introduced a parallel merge queue capable of testing up to 100 PRs in a single CI run, Adopted by Brex, Faire, Zillow, Gusto, Cockroach Labs and other high-growth engineering teams

## Products & services

- **Merge Queue** — A parallel merge queue that batches and tests multiple pull requests in a single CI run (up to 100 PRs), tests non-overlapping changes simultaneously, and uses auto-bisection to isolate failures without ejecting entire batches - cutting merge times and CI costs.
- **Flaky Tests** — Automatically detects and quarantines unreliable tests across any language, test runner, or CI provider, collecting failure data and tracking test health so false failures stop blocking pipelines.
- **CI Analytics & Failure Analysis** — AI-powered analysis that surfaces duplicate failures, summarizes what went wrong, and tracks test status history and CI performance trends, with GitHub PR summaries and Slack/Linear/Jira notifications.
- **Trunk Code Quality / CLI** — A meta-linter and formatter toolkit that unifies open-source static analysis, linting, and formatting tools behind a single CLI and configuration.

## Achievements

- Raised $25M Series A in April 2022, bringing total funding to ~$28.5M
- Introduced a parallel merge queue capable of testing up to 100 PRs in a single CI run
- Adopted by Brex, Faire, Zillow, Gusto, Cockroach Labs and other high-growth engineering teams
- Helped a customer (Caseware) cut median merge time from 6 hours to 90 minutes via intelligent batching
- Achieved SOC 2 compliance for enterprise security

## Latest updates

- **2022-04** — Announced $25M Series A led by Initialized Capital to build a unified developer-experience platform.
- **2024-08** — Expanded flaky-test detection and CI analytics; positioned as an AI DevOps platform for reliable testing and CI.
- **2025-01** — Shipped new merge queue performance and feature updates, including improved parallel batching and anti-flake protection.

## Links

- Website: https://trunk.io
- LinkedIn: https://www.linkedin.com/company/trunkio
- Twitter/X: https://twitter.com/trunkio
- GitHub: https://github.com/trunk-io
- YouTube: https://www.youtube.com/@trunkio

---

Profile page: https://yespress.io/trunk
Published by YesPress — https://yespress.io
Last updated: 2026-07-10