Jenkins is #1 in Top 10 Continuous Integration tools

https://jenkins-ci.org/
Jenkins
In a nutshell Jenkins CI is the leading open-source continuous integration server. Built with Java, it provides 1009 plugins to support building and testing virtually any project.

Positions in ratings


#1 in Top 10 Continuous Integration tools

Alternatives


The best alternatives to Jenkins are: Travis CI, Atlassian Bamboo, Teamcity, Buildbot