1M Pull Requests per Year and Not a Single Broken CI

Julien Danjou -

At Mergify, we merge more than 1M pull requests every year on behalf of our users.

That’s not a brag about volume. That’s a statement of purpose.

Because behind every single one of those pull requests, there’s one simple promise we’re keeping:

👉 Your CI will never break after a merge.

That’s our job. That’s why we exist.

The Problem Nobody Likes to Talk About

If you’ve worked in software long enough, you know the story:

  • A pull request is opened.
  • CI passes.
  • A few more PRs get merged.
  • Yours gets merged too — it’s green, no conflicts.
  • Five minutes later, CI on main is red.

💥 Boom. Something broke. And now no one knows why.

This is one of the most frustrating and costly problems in software development. You thought CI passing meant everything was safe. It wasn’t. You merged something that looked fine on its own, but was stale. Out of sync. Behind just enough commits to break once it hit the main branch.

Now you have to stop everything:

  • Revert the PR
  • Investigate what failed
  • Fix main
  • Block other engineers from merging
  • Rebuild confidence

All because your CI didn’t tell the whole story.

Enter the Merge Queue

This is the kind of chaos Mergify was built to eliminate.

Our Merge Queue product is more than a way to manage pull requests. It’s a safety system.

Every PR goes through the queue. Every PR is tested against the latest version of main, before it’s merged. Not after.

That means:

  • No stale merges
  • No guessing
  • No surprises

Just reliable, deterministic CI — every single time.

When we merge your PR, you can deploy it confidently. You know it was tested as it will run in production.

Why We Take This So Seriously

We merge 50,000 pull requests per month not just because it’s technically cool. We do it because our users trust us to protect their main branch.

That’s the contract:

  • We test what matters, when it matters
  • We catch what your CI alone can’t
  • We handle the messy edge cases, the race conditions, the queue prioritization

So you don’t have to worry about it.

Never Break the CI Again

CI is supposed to be the safety net for your codebase. But without a proper merge queue, it’s not a net — it’s a minefield.

At Mergify, we believe CI should never break after a merge. It’s not a luxury. It’s table stakes for modern engineering.

That’s why we built Mergify.

That’s why we run the queue, 24/7, for teams big and small.

And that’s why every one of those 1 million merges is a little victory — not just for us, but for every engineer who gets to ship code without the stress.