The best alternatives to Semaphore are Heroku, Greenhouse, and Glue42 Desktop Zapier. If these 3 options don't work for you, we've listed a few more alternatives below.
What do you think of Semaphore?
ClickUp— Achieve 30% More Efficiency with the Everything App for Work
Glue42 Desktop Zapier is the first desktop app integration on Zapier! This free tool allows you to integrate desktop Excel with the 1k+ web apps listed on the Zapier platform. Install the Glue42 Excel add-in and then login to Zapier to start zapping between Excel and other apps. Integrate files stored locally or in the cloud.
CI Demon is a macOS application that puts all your CI information directly on your Desktop's status bar. Save time by not having to navigate to slow web apps. Get notifications when a build fails. Trigger re-builds at the click of a button.
Zerber is a CI platform created solely for JavaScript projects. Zerber has a simple yet mighty config file. All builds run in parallel out of the box. And compared to popular CI solutions you don't have to do a heavy config.