Tutanota is an independent privacy-friendly ad-free email provider. You can follow them at:

➡️ @Tutanota

Their website is at tutanota.com.

Their free open source app is available on @fdroidorg, Google Play and App Store. It's also available for Linux, Mac and Windows.

Tutanota's income comes from user subscriptions, they don't sell people's data.

They support 2FA and end-to-end encryption, with e2ee by default.

Protonmail is an independent email provider with no ads, instead using a traditional monthly subscription business model.

You can follow them at:

➡️ @protonmail

Their website is at protonmail.com

They also have Fedi accounts for their VPN service (@protonvpn) and Calendar service (@ProtonCalendar).

K-9 Mail is one of the most popular free open source e-mail apps for Android devices. You can follow their official account at:

➡️ @k9mail

Their website is at k9mail.app

It's available to download from @fdroidorg, Google Play and Amazon App Store.

(You can also download the app and source from the git at github.com/k9mail/k-9)

Delta Chat is a free open source encrypted messaging system that works through email (so it is federated too). You can follow at:

➡️ @delta

There are apps for Android, iPhone/iPad, Linux, Mac and Windows. More info at delta.chat

(You can also message people on conventional email accounts unencrypted.)

Tutanota is an independent ad-free secure email and calendar provider. You can follow at:

➡️ @Tutanota

The official site is at tutanota.com

Tutanota's mobile app is FOSS and available from , Google Play and iPhone App Store.

Protonmail is an ad-free independent encrypted email provider. You can follow their official account at:

➡️ @protonmail

...they also have an account for their VPN service:

➡️ @protonvpn

...and their calendar service:

➡️ @ProtonCalendar

The official site is at protonmail.com

K-9 Mail is a free open source e-mail app for Android. You can follow the official account at:

➡️ @k9mail

The official site is at k9mail.app

It's available from @fdroidorg and Google Play.

Delta Chat is a free open source encrypted messaging system that works through email accounts. You can follow at:

➡️ @delta

It's available for Android, iOS, Windows, Mac and Linux from the official site at delta.chat

Mastodon

This is a brand new server run by the main developers of the project as a spin-off of mastodon.social 🐘 It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!