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