NEW Cut down a large Rails test suite to 2 minutes or less with Boosters. Learn more →

Get a 5x faster Rails CI build in one click

Semaphore Boosters analyze and automatically parallelize your tests in CI.

Get Started with GitHub

↑ Watch a 1-minute video to see how it works. ↑


Keep your team productive

We got it. You've tried it all, but time from commit to deploy is still growing. You have business objectives and can't spend hundreds of hours optimizing continuous integration.

The good news?

Semaphore Boosters can evenly distribute your large test suite across any number of parallel CI jobs. You can instantly save your team hours of idle time per week.

Kendal Miller
Senior Engineer at par8o
par8o logo

“Boosters is very easy to set up and a major time saver for our team. We reduced build time from over 2 hours to 13 minutes.”

Parallel testing integrated in cloud-based continuous integration

Included in Semaphore CI/CD — no additional fees!
Works with rspec logoRSpec and cucumber logoCucumber.
No changes in your source code are required.
No configuration or backend maintenance is required.
Running on #1 fastest hosted CI service.

It’s a game changer for Rails developers

Some of the finest development teams are using Semaphore. But don’t just take our word for it.

Artem Lipiy
Artem Lipiy
QA Lead at 500px

“It’s really easy to scale with Semaphore compared to Jenkins, where a lot of maintenance and overhead is required. When we need more concurrency we just upgrade. Semaphore just works for us.”

Ross Baird
Ross Baird
Lead Developer at Optimal Workshop
Optimal Workshop logo

“Without parallel tests, our test suite would run well past the hour mark from start to finish. The ability to split our test suite in parallel jobs and have it run in under 7 minutes is so important for us.”


Human-frequency product and article updates. Unsubscribe at any time.

© 2009-2018 Rendered Text. All rights reserved. Fine print: Terms of Service, Privacy policy, Security.

Try Semaphore, Free for 30 Days

Easy setup, unlimited projects and collaborators, no credit card required. Always free for open source.

or sign up with your GitHub account