Muse Group

Muse Group builds the software and content layer under a large share of the world's consumer music activity. Founded in 1998 and headquartered in San Francisco with global operations, the company runs an ecosystem serving over 400 million users across learning, playing, composing, recording, publishing, sharing, licensing, and monetizing creative work. That scale is the security context: massive user-generated content stores, account systems spanning multiple properties, and desktop software distributed outside the app store model.

The product surface is unusually broad. Ultimate Guitar hosts 2.1 million tabs and draws 30 million monthly active users. MuseScore holds 3.6 million user-created scores, with MuseScore Studio software used monthly by 1.5 million people. Audacity, available since 2000, has passed 100 million downloads - an open-source-adjacent desktop audio editor installed on endpoints that never touch a company-managed update channel. Audio.com counts 11 million registered users, MuseHub 2 million monthly actives, and Hal Leonard was recently acquired as the world's largest music publication source. The mix of web platforms, desktop installers, an audio hub application, and newly integrated publishing IP means the threat model spans account takeover, content and rights abuse, supply chain in desktop distribution, and post-acquisition integration risk.

Muse Group is founder-led and majority controlled by Eugeny Naidenov, who founded Ultimate Guitar in 1998 and continues to set the long-term product agenda. The stated mission is to build the definitive technology platform for music learners and creators - a goal that depends on holding user accounts, creative work, and licensing relationships across a portfolio rather than a single app. The company operates globally from San Francisco.