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ossia score vs QLab: catalog facts
ossia score	QLab
Best for: Artists and technicians building interactive installations and live shows	Best for: Theatre and live event designers running cues from a Mac
Free Free and open source.	Free + paid options Free to download; advanced features require a paid licence.
Windows, macOS, Linux	macOS
Supports OSC, MIDI, DMX, MQTT, CoAP, BLE and serial Visual branching and condition-triggered scores All 4 strengths for ossia score Supports OSC, MIDI, DMX, MQTT, CoAP, BLE and serial Visual branching and condition-triggered scores Scriptable with JavaScript and Faust Audio and video playback in the same timeline	Sound, video, lighting and show control in one cue list Object audio for spatial sound All 4 strengths for QLab Sound, video, lighting and show control in one cue list Object audio for spatial sound Used in professional theatre Actively developed with regular updates
Specialized tool with a learning curve for newcomers Built for interactive art and shows rather than ordinary music production	macOS only Advanced features need a paid licence
Downloadable app	Downloadable app
Open source	Not open source
License not stated	License not stated
No account needed	Not stated if an account is needed
Offline features available	Offline features available
Official website Full listing and sources Sources for ossia score ossia.io Catalog checked October 2, 2026	Official website Full listing and sources Sources for QLab qlab.app Catalog checked October 1, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.