CircleCI is a continuous integration and delivery platform that helps software teams quickly and confidently build, test, and deploy applications. It’s the most popular continuous integration platform for web developers, with more than 100,000 organizations using it. CircleCI enables developers to quickly and easily test and deploy code changes in a secure environment. It provides a seamless workflow to test, build, and deploy applications, with pre-configured settings that can be customized. It supports an extensive range of languages, frameworks, and services, as well as third-party integrations. It also provides powerful analytics to monitor and measure performance and identify bottlenecks. CircleCI is ideal for teams of any size, from startups to enterprises.
Discontinued Hudson is now Jenkins
The last confirmed source was in 2014 (https://sourceforge.net/p/cruisecontrol/code/HEAD/tree/), the latest version was in 2014 (https://sourceforge.net/projects/cruisecontrol/) ...
Buddy has more options than CircleCi and more development. Buddy has the best support working 24/7.