UnInbox - Modern email for teams and professionals. 100% Open Source.
Discussions
Matrix.org
Inbox Zero
StartMail - Private email you can trust
Polymail
Secure email: Tutanota free encrypted email.
Proton — Privacy by default
Mailo, la messagerie qui vous respecte
Station • One app to rule them all
Mimestream
Ready
BlueMail - The Best Email App for Windows, Mac, Linux, Android and iOS
Secret Messenger - A new era of messaging
Beeper — All your chats in one app. Yes, really.
Franz – a free messaging app for Slack, Facebook Messenger, WhatsApp, Telegram and more
All-in-One Messenger
Texts
The Power Email App - Postbox
Fastmail | We Respect Your Privacy & Put You in Control
MXroute - Email Hosting
Private Email - Web-Based Business Hosting Solution
Treebal | La messagerie éco-responsable qui préserve la planète et vos données.
Accueil
Session | Send Messages, Not Metadata. | Private Messenger
Secure Email with Zivver
Signal Messenger: Speak Freely
Telegram – a new era of messaging
Olvid - Secure Messaging
Keybase
Element | Secure Collaboration and Messaging