Concourse vs Testling: What are the differences?
Concourse: Pipeline-based CI system written in Go. Concourse's principles reduce the risk of switching to and from Concourse, by encouraging practices that decouple your project from your CI's little details, and keeping all configuration in declarative files that can be checked into version control; Testling: Automatic browser tests on every push. Sign in with your browserling account. free for open source. No sign-up required. Just configure a github webhook.
Concourse and Testling can be categorized as "Continuous Integration" tools.
Concourse and Testling are both open source tools. Concourse with 3.99K GitHub stars and 482 forks on GitHub appears to be more popular than Testling with 337 GitHub stars and 47 GitHub forks.