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Clapgrep vs Recoll: catalog facts
Clapgrep	Recoll
Free Free and open source under the GPL-3.0-or-later licence.	Free Free and open source under the GPL.
Linux	Windows, macOS, Linux, Browser extension
Searches inside PDF files as well as plain text Searches a whole folder in one pass	Handles an unusually wide range of formats, including mail folders Powerful query language with stemming, fields and proximity
Linux only Small project maintained by a single developer	Format support depends on external helper programs being installed The Qt interface is functional rather than polished
Downloadable app	Downloadable app, Browser extension
Open source	Open source
License: GPL-3.0-or-later	License: GPL-2.0
No account needed	Not stated if an account is needed
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 22, 2026

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