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Thunderbird vs Canary Mail: catalog facts
Thunderbird	Canary Mail
Free Free forever, funded by donations.	Paid Paid subscription, with a free trial or limited free tier.
Windows, macOS, Linux, Android	Windows, macOS, Android, iOS
Unified inbox across every account, or each account kept separate, your choice Mail, calendar, contacts and tasks in one application rather than four	Built-in encryption support alongside AI-assisted email triage Available across Windows, Mac, iOS, and Android
The interface carries a lot of history and can feel dense next to a webmail tab Major ESR releases have historically been disruptive for add-ons and settings	Full feature set requires a paid subscription AI features depend on cloud processing rather than being fully local
Downloadable app	Downloadable app
Open source	Closed source
License: MPL-2.0	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 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.