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WordWeb vs Wordbook: catalog facts
WordWeb	Wordbook
Freemium A free version is available, with WordWeb Pro sold separately.	Free Free and open source under the GPL-3.0-or-later licence.
Windows	Linux
Offers one-click lookup from Windows programs Includes offline definitions and usage examples	Works fully offline Pronunciations through eSpeak
The free version is subject to licensing	English only Linux only
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-or-later
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 1, 2026

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