> For open source projects, everything except the droplet in Digital Ocean is completely free. Alternatively, Appveyor & Travis have fully free tiers. They do

> For open source projects, everything except the droplet in Digital Ocean is completely free. Alternatively, Appveyor & Travis have fully free tiers. They don't even have my credit card number. CI is trivially forked, doesn't require configuring secrets per repository, etc. Being CI focused, both have configuration and UI oriented towards having a matrix of builds that can individually pass/fail for more granular results, and comes with various SVG badges for build status. A concrete example of travis on a Rust project: https://github.com/MaulingMonkey/bugsalot/blob/master/.travis.yml https://github.com/MaulingMonkey/bugsalot/blob/master/.travi... https://travis-ci.org/github/MaulingMonkey/bugsalot/builds/628911388 https://travis-ci.org/github/MaulingMonkey/bugsalot/builds/6... Linux/Windows/OSX unit testing, Android/iOS/WASM builds.