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Mailbird vs Becky! Internet Mail: catalog facts
Mailbird	Becky! Internet Mail
Paid Paid desktop app, sold as a one-time or subscription license.	Paid Shareware that requires a paid licence after evaluation.
Windows, macOS	Windows
Unifies multiple email accounts and providers into one inbox App integrations reduce the need to switch to separate tools	Small, fast native Windows program Multiple mailboxes with separate profiles
Windows and macOS only Full feature set requires a paid license	Windows only HTML mail relies on an Internet Explorer component
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	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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