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Edison Mail vs FairEmail: catalog facts
Edison Mail	FairEmail
Free Offered as a download; the homepage does not list prices.	Free Free to download from Google Play, F-Droid or GitHub releases.
macOS, Android, iOS	Android
Unified inbox across several email accounts Available on phones and the Mac	Works with nearly all IMAP providers and unlimited accounts OpenPGP and S/MIME encryption built in
No Windows or Linux version Closed source	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 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.