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eM Client vs Mailbird: catalog facts
eM Client	Mailbird
Freemium Free licence for personal, non-commercial use with up to two accounts; Personal from…	Paid Paid desktop app, sold as a one-time or subscription license.
Windows, macOS, Android, iOS	Windows, macOS
Handles Gmail, Microsoft 365, Outlook, Exchange and plain IMAP without plugins Email, calendar, tasks, contacts, notes and chat in one polished window	Unifies multiple email accounts and providers into one inbox App integrations reduce the need to switch to separate tools
No Linux version The free licence is capped at two accounts and forbids any commercial use	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
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 20, 2026	Official website Full listing and sources Checked September 22, 2026

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