Established in 1998 as Ultimate Guitar, it became Muse Group in 2021 following several acquisitions such as MuseScore and Audacity.

It is now headquartered in Limassol, Cyprus, and became the parent company of Hal Leonard in 2023.

In 2017, the company acquired the open source music notation tool MuseScore (now MuseScore Studio) and its sheet music sharing platform MuseScore.com, respectively launched in 2002 and 2010.

[3] In 2021, it acquired the open source audio editor Audacity, a software project originally started in 2000.

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