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Mergify

Mergify provides a merge queue that tests pull requests together and isolates bad ones quickly, plus Test Engine to stop flaky tests failing builds, CI insights and workflow automation for GitHub.

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Introduction

Mergify’s merge queue tests pull requests together and finds a bad one in seconds, keeping main green as PR volume grows. Test Engine keeps flaky tests from failing builds, and CI insights show what broken main and flaky tests cost your team each month, with an ROI calculator.

It runs on GitHub.com or in your network on GitHub Enterprise Server. Startups can get up to $12,000 in credit, and open-source projects use it free.

Merge queues pay off when main breaks often because PRs pass individually but fail together. Measure how often main is red before and after enabling the queue, and pair it with flaky-test handling so the queue does not stall on noise.

Features

  1. Merge queue: Batch and test PRs together.
  2. Bad PR isolation: Find culprits fast.
  3. Test Engine: Flaky test handling.
  4. CI insights: Cost of broken main.
  5. GHES support: On-premise option.

Pros

  1. Free for open source: OSS projects pay nothing.
  2. Startup credits: Up to $12,000.

Cons

  1. GitHub only: No GitLab support mentioned.
  1. Install the Mergify GitHub app.
  2. Add a .mergify.yml with queue rules.
  3. Enable Test Engine for flaky tests.

Resources:

Pricing

Mergify has a $0 plan, paid seats from $21 per seat per month (15% off yearly on Max), on-premise Enterprise, free use for open-source projects and up to $12,000 in startup credits.

  1. High-volume GitHub repositories with frequent broken main.

Conclusion

Mergify is a mature merge queue with growing CI-quality features.

Start with the queue, then add Test Engine.

On CheckOps, Mergify is filed under the Release & CI gates stage. Related tools listed here include Trunk Flaky Tests, Buildkite Test Engine, Currents, Codecov, pre-commit and Danger JS. Before standardising on one, compare recent maintenance activity, the pricing model as your usage grows, and the integrations you rely on today. Information on this page was verified against the official website, documentation and repository on 11 November 2026.

Alternatives

Other tools on CheckOps that cover similar ground. Open a page, or compare one with Mergify side by side.