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FairEmail vs Nine: catalog facts
FairEmail	Nine
Free Free to download from Google Play, F-Droid or GitHub releases.	Paid Pricing is not listed on the homepage; check the store listing for current terms.
Android	Android, iOS
Works with nearly all IMAP providers and unlimited accounts OpenPGP and S/MIME encryption built in	Direct Push sync with Exchange ActiveSync servers Mail, calendar, contacts, tasks and notes in one app
No Microsoft Exchange Web Services or ActiveSync support Android only	IMAP accounts sync email only Pricing not stated on the homepage
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 23, 2026

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