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Canary Mail vs FairEmail: catalog facts
Canary Mail	FairEmail
Paid Paid subscription, with a free trial or limited free tier.	Free Free to download from Google Play, F-Droid or GitHub releases.
Windows, macOS, Android, iOS	Android
Built-in encryption support alongside AI-assisted email triage Available across Windows, Mac, iOS, and Android	Works with nearly all IMAP providers and unlimited accounts OpenPGP and S/MIME encryption built in
Full feature set requires a paid subscription AI features depend on cloud processing rather than being fully local	No Microsoft Exchange Web Services or ActiveSync support Android only
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is 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 23, 2026

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