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FairEmail vs Canary Mail: catalog facts
FairEmail	Canary Mail
Free Free to download from Google Play, F-Droid or GitHub releases.	Paid Paid subscription, with a free trial or limited free tier.
Android	Windows, macOS, Android, iOS
Works with nearly all IMAP providers and unlimited accounts OpenPGP and S/MIME encryption built in	Built-in encryption support alongside AI-assisted email triage Available across Windows, Mac, iOS, and Android
No Microsoft Exchange Web Services or ActiveSync support Android only	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: GPL-3.0	License not stated
Not stated if an account is 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.