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Raven Reader vs Vienna RSS: catalog facts
Raven Reader	Vienna RSS
Free The open-source application is available without a license fee.	Free Free and open source under the Apache licence.
Windows, macOS, Linux	macOS
No account and no data collection; subscriptions stay local Runs on Windows, macOS and Linux from one codebase	Smart folders assemble articles from any feed by criteria you define Native Mac application rather than a web wrapper
Electron application with a large footprint No synchronisation between machines	macOS only Sync support is limited compared with commercial readers
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: Apache-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.