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TeamCity is a build management and continuous integration server from JetBrains. It was first released on October 2, 2006 and is commercial software and licensed under a proprietary license: a freemium license for up to 100 build configurations and three free Build Agent licenses are available. open-source projects may request a free license.
Notable features
Gated commits (prevents developers from breaking sources in a version control system by running the build remotely for local changes prior to commit)
Build Grid. Allows running multiple builds and tests under different platforms and environments simultaneously