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Fluent Reader vs Alligator: catalog facts
Fluent Reader	Alligator
Free Free and open source under a BSD 3-clause licence. The Microsoft Store and Mac App Store…	Free Free and open source under the GPL-2.0-or-later.
Windows, macOS, Linux	Linux
Works fully locally, or syncs with Inoreader, Feedbin, Fever and Google Reader API services Regular expression rules that hide, mark read or star articles automatically as they arrive	Adaptive layout for desktop and phone screens Supports standard RSS and Atom feeds
Electron, so it is heavy for a feed reader The Microsoft Store version is recommended for auto-update; GitHub builds update manually	Fewer features than KDE's larger Akregator reader Linux only
Downloadable app	Downloadable app
Open source	Open source
License: BSD-3-Clause	License: GPL-2.0-or-later
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 1, 2026

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