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NAPS2 vs gscan2pdf: catalog facts
NAPS2	gscan2pdf
Free The open-source application is available without a license fee.	Free Free open-source software packaged by Linux distributions such as Debian.
Windows, macOS, Linux	Linux
Works with nearly any scanner protocol on Windows, macOS and Linux Built-in OCR produces searchable PDFs with no extra step	Scans straight to PDF or DjVu Uses SANE, so it works with many scanners
Deliberately simple; it is not a document management system OCR language packs must be downloaded separately	Linux only Plain, dated interface
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
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 September 22, 2026	Official website Full listing and sources Checked September 24, 2026

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