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FSearch vs Recoll: catalog facts
FSearch	Recoll
Free The open-source application is available without a license fee.	Free Free and open source under the GPL.
Linux	Windows, macOS, Linux, Browser extension
Instant indexed results with advanced query options	Handles an unusually wide range of formats, including mail folders Powerful query language with stemming, fields and proximity
Results depend on which folders have been indexed.	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-2.0	License: GPL-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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