It is available on Microsoft Windows, macOS, Linux and other Unix systems that use the X Window System.

Terminator will run on any modern POSIX system running Java 6 or later.

[1] Terminator was originally written by Phil Norman, who produced a more-or-less usable replacement for rxvt on his own between 21 April 2004 and 28 May 2004; roughly a month of development time.

Elliott Hughes took Phil's terminal emulation and used it as a base upon which he could experiment with advanced terminal emulator features and continues to actively develop Terminator.

Martin Dorey ported Terminator to Cygwin.