[joshschreuder]

What do you mean by supports every platform?

There are a bunch of CI tools (Jenkins, Travis, etc.) that offer either hosted service that work everywhere, or on-prem which can be installed on every major platform.

[2-m3m3n70]

I mean that the hosted build environment supports every platform (Windows, Mac, Linux).

Travis for instance only supports Mac and Linux. Circle CI supports Mac and Linux. Appveyor supports Windows and Linux.

Other tools like Jenkins or Buildkite can be installed anywhere but you have manage the build servers.