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CoBang vs Decoder: catalog facts
CoBang	Decoder
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the GPL-3.0-or-later licence.
Linux	Linux
Reads both QR codes and barcodes Native Linux desktop app	Scans from a camera or a screenshot Generates QR codes as well as reading them
Linux only No dedicated homepage beyond the GitHub repository	Linux only Focused on QR codes rather than other barcode types
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0-or-later
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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