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Sterna Mail vs Infomaniak Mail: catalog facts
Sterna Mail	Infomaniak Mail
Free Free and open source under the GPL-3.0-or-later licence, with no ads.	Freemium A free address with 20 GB storage is available; other Infomaniak mail plans are paid.
Android	Android
Native JMAP support as well as IMAP/SMTP No tracking, ads or Google services	Open-source Android client Free address with 20 GB of storage and no ads
Android only Young project still changing its interface often	Only works with Infomaniak-hosted addresses F-Droid version lacks push notifications
Downloadable app	Downloadable app, Hosted service
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0
Not stated if an account is needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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