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Pegasus Mail vs Mailbird: catalog facts
Pegasus Mail	Mailbird
Free Free to use; the developer accepts donations.	Paid Paid desktop app, sold as a one-time or subscription license.
Windows	Windows, macOS
Free with no paid tier Decades of continuous development	Unifies multiple email accounts and providers into one inbox App integrations reduce the need to switch to separate tools
Windows only Traditional interface and slow release pace	Windows and macOS only Full feature set requires a paid license
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account 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 23, 2026	Official website Full listing and sources Checked September 22, 2026

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