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Fretboard vs Chordify: catalog facts
Fretboard	Chordify
Free Free and open source under the GPL-3.0-or-later licence.	Freemium Pricing details could not be confirmed; see the official website.
Linux	Web
Look up chords by name or by plotting them on the neck Shows alternative fingerings and barre chords	Detects chords automatically from a song Useful for practising and playing along
Guitar only Linux only	Automatic chord detection can make mistakes Features and pricing not confirmed here
Downloadable app	Web application
Open source	Closed source
License: GPL-3.0-or-later	License not stated
No 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.