Fast & free RSS feed reader as a browser extension for reading blogs, news or any RSS, Atom or RDF based feed.
Free Plan: Unlimited feeds (no built-in limits)
Feedly is a better way to organize, read and share the content of your favorite sites. It weaves the content from the RSS feeds of your favorite websites into a fun magazine-like experience and provides seamless integration with social networks.
Free Plan: 100 feeds Pro Plan (7 € month): 1000 feeds Pro+ (9 € month): 8500 fedds
It is free for Mac, Windows and Linux if you download it from GitHub, and it's paid ($2) for Android and iOS.
Free Plan: Unlimited feeds (no built-in limits)
FeedReader Online is a FREE RSS news aggregation solution that provides robust, state-of-the-art features in an intuitive, user-friendly environment.
Free Plan: 200 feeds Pro Plan (8 € month): 2500 feeds
Folo is an RSS Reader focused on AI, cross-platform (macos, Linux, Windows, Android, iOS) + web app.
Free Plan: 150 feeds Basic Plan (4 € month): 1000 feeds Basic Plan (8 € month): 2500 feeds Basic Plan (80 € month): 25000 feeds
Inoreader lets you follow your favorite websites and creators, collect articles, and discover inspiring content from across the web. You can customize your feed, automate updates, filter out the noise, and collaborate with your team on Inoreader.
Free Plan: 150 feeds Basic Plan (7 € month): 2500 feeds
NewsBlur is a personal news reader bringing people together to talk about the world.
Free Plan: 64 feeds Pro Plan (36 € year): 1024 feeds Pro Plan (100 € year): 4096 feeds
Readwise reader permit to save RSS Feeds https://readwise.io/read
Pro Plan (12 € month / 120 € year): unlimited feeds
NetNewsWire is a a free and open source news RSS aggregator for MacOS, iOS and iPadOS.
Free Plan: unlimited feeds
Newsify is a iOS/macOS RSS reader with optional third-party sync (e.g., Feedly, iCloud).
Free Plan: unlimited feeds Premium Plan (~$2.99/month or ~$29.99/year): unlimited feeds
Apple RSS client; relies on external sync services or local accounts.
Free/Basic: unlimited feeds (depends on backend) Premium (~$1/month or ~$10/year): unlimited feeds (backend-dependent)
RSS client with built-in engine or external sync support.
Free Plan: 20 feeds (built-in engine) Premium Plan: RSS service dependant
All are free without a feed limit, depending on the connected backend.
FeedMe is a simple and full featured offline RSS reader for Feedly, InoReader, Bazqux, The Older Reader, Feedbin, Tiny Tiny RSS, FreshRSS, Fever, aiming at providing the best user experience for users to read and manage your favorite articles.
Feeder is a fully free/libre feed reader. It supports all common feed formats, including JSONFeed. It doesn't track you. It doesn't require any setup. It doesn't even need you to create an account! Just setup your feeds, or import them from your old reader via OPML, then get on with syncing and reading.
This is a copy of Reeder, in order to give Android an RSS reader similar to Reeder, combines the interaction logic of Reeder with the design style of Material Design 3.
Akregator is a news feed reader. It enables you to follow news sites, blogs and other RSS/Atom-enabled websites without the need to manually check for updates using a web browser.
Free/Basic: unlimited feeds
Liferea is a web feed reader/news aggregator that brings together all of the content from your favorite subscriptions into a simple interface that makes it easy to organize and browse feeds. Its GUI is similar to a desktop mail/news client, with an embedded web browser.
Free/Basic: unlimited feeds
A modern feed reader designed for the GNOME desktop. NewsFlash is a program designed to complement an already existing web-based RSS reader account.
Free/Basic: unlimited feeds
Photon is an RSS/Atom reader with the focus on speed, usability, and a bit of UNIX philosophy.
Free/Basic: unlimited feeds
RSS Guard is simple, light and easy-to-use RSS/ATOM feed aggregator developed using Qt framework which supports online feed synchronization.
Free/Basic: unlimited feeds
All are free and open source without a feed limit, depending on the connected backend.
FreshRSS is a free, self-hosted RSS aggregator. It is quite lightweight, fast (it can manage +100k articles without complaining) and powerful (e.g. shortcuts, filters, responsive design, multi-views, multi-themes, multi-users, statistics, provides a Google Reader API, etc.)
RSS Monster is an easy to use web-based RSS aggregator and reader compatible with the Fever API, created as an alternative for Google Reader.
Tiny Tiny RSS is an open source web-based news feed (RSS/Atom) reader and aggregator, designed to allow you to read news from any location, while feeling as close to a real desktop application as possible.
Comments
There's a new winner for me:
Folo, which is compatible with Android, iOS, Windows, macOS, Linux, and the web. It has an incredible interface and is free and open source. What more could you want?
Thanks a lot! I would like to use NetNewsWire it is FOSS and looks very beautiful but it is only for macOS, and I only have Linux and Windows. Now I only use
Inoreader visiting as a web app on the desktop with select list of rss feeds.
I have tried many apps (except macos apps) and for me the best are: Inoreader (web + mobile app), Feedbro (web extension), Akregator, NewsFlash (Linux apps). Each app with a good interface, still maintained and free to use (Inoreader is freemium).
I like GUI apps easy to install and use, I don't like to self host an app on your own server (because you need to pay for the server and maintain it) and I don't like CLI apps because you can't navigate things easily.
I use
NetNewsWire on my mobile and 
Fluent Reader on my desktop. Good list!