Messaging & email

Threema App for Android.

Instagram without Reels, feed or ads: an open-source, updatable Instagram app for Android that keeps DMs and stories.

An unofficial open source Android app for Reddit.

Wire for iOS is the open-source source code of the Wire messenger app for iPhone and iPad, offering end-to-end encrypted messaging and calls.

Tuta Mail is an open-source, end-to-end encrypted email app that protects your emails, contacts and calendar on all your devices.

Thunderbird for Android is an open-source, privacy-focused email app for Android that manages multiple email accounts in one place, with an optional Unified Inbox.

Signal-iOS is an open-source private messenger app for iPhone that lets you send encrypted messages and calls to friends.

Signal Android is an open-source, end-to-end encrypted messaging app for Android that lets you send private messages and HD voice and video calls.

Proton Mail iOS is the open-source iPhone client for Proton Mail, an encrypted email app focused on privacy, built with Swift, SwiftUI and Rust.

Element Classic iOS is a previous-generation Matrix chat client for iPhone and iPad, built on MatrixSDK, for secure team and community messaging.