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Nuclear vs Spotify: catalog facts
Nuclear	Spotify
Free Free and open source under the AGPL-3.0 licence.	Freemium Lossless streaming requires a Premium subscription.
Windows, macOS, Linux	Web
Streams from multiple sources, extendable with plugins Playlist import from other services and JSON files	Web player that runs in a browser Lossless audio for Premium subscribers
Desktop only, no mobile app macOS may block the app on first launch	Lossless audio limited to Premium and supported apps and devices Proprietary service with no local ownership of music
Downloadable app	Web application, Hosted service
Open source	Closed source
License: AGPL-3.0-only	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.