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Captain Plugins vs Scaler 3: catalog facts
Captain Plugins	Scaler 3
Paid Paid software sold by Mixed In Key, with upgrade deals for existing customers.	Paid Paid software sold through the Scaler Music website.
Windows, macOS	Windows, macOS
Works as VST and AU plugins inside common DAWs Generates chord progressions and melodies as MIDI	Chord progression and melody suggestions Makes harmony and music theory approachable
Paid, with no free version shown Requires a DAW to use	Paid commercial software Suggestions are theory-based rather than full song generation
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Account 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 26, 2026

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