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

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