Proton Mail

by Proton AG

Secure email with end-to-end encryption for your Android devices.

Thunderbird

by Thunderbird

Thunderbird for Android – Open Source Email App for Android (fka K-9 Mail).

Tuta

by tutao

Tuta encrypted email, calendar and contacts client.

FairEmail

by M66B

Fully featured, open source, privacy oriented email app for Android.

K-9 Mail

by Thunderbird

K-9 Mail is an open-source email client for Android made by Mozilla.

Thunderbird Beta

by Thunderbird

Thunderbird Beta for Android – Open Source Email App for Android (fka K-9 Mail).

Thunderbird Nightly

by ftp.mozilla.org

Thunderbird Nightly for Android – Open Source Email App for Android (fka K-9 Mail).