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WordWeb vs Artha: catalog facts
WordWeb	Artha
Freemium A free version is available, with WordWeb Pro sold separately.	Free Free and open source under GPL-2.0.
Windows	Windows, Linux
Offers one-click lookup from Windows programs Includes offline definitions and usage examples	Looks up selected text with a configurable hotkey Works offline using WordNet
The free version is subject to licensing	English thesaurus only
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
Not stated if an account is needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 8, 2026

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