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Canary Mail vs Thunderbird: catalog facts
Canary Mail	Thunderbird
Paid Paid subscription, with a free trial or limited free tier.	Free Free forever, funded by donations.
Windows, macOS, Android, iOS	Windows, macOS, Linux, Android
Built-in encryption support alongside AI-assisted email triage Available across Windows, Mac, iOS, and Android	Unified inbox across every account, or each account kept separate, your choice Mail, calendar, contacts and tasks in one application rather than four
Full feature set requires a paid subscription AI features depend on cloud processing rather than being fully local	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
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MPL-2.0
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 September 20, 2026

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