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The Bat! vs Mailbird: catalog facts
The Bat!	Mailbird
Paid Commercial software from Ritlabs; prices are not listed on the product page.	Paid Paid desktop app, sold as a one-time or subscription license.
Windows	Windows, macOS
Optional encryption of the local message base Blocks tracking pixels and malicious code in mail	Unifies multiple email accounts and providers into one inbox App integrations reduce the need to switch to separate tools
Windows only Commercial license required	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
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.