TRIfA

TRIfA Tox Client

baresip+

VoIP and mobile calling and messaging app based on baresip library

baresip

VoIP and mobile calling and messaging app based on baresip library

Quicall

Secure messaging with chat, voice and video calls.

Conversations

Encrypted, easy-to-use XMPP instant messenger for your mobile device

SimpleX Chat

SimpleX Chat - e2e encrypted messenger without any user IDs - private by design!

Duetto

A tiny Discord for two, on your own server: a permanent voice and video channel.

Wire • Secure Messenger

Wire offers highly secure communication – anywhere and anytime.

Nextcloud Talk

Have private video calls and chat using your own server.

Threema Libre

Secure and private messaging

aTalk

XMPP/Jabber client with encrypted instant messaging and video calls

Olvid

پیام‌رسانی خصوصی برای همه

Element X - Secure Chat & Call

Sovereign. Seamless. On Matrix

Session F-Droid

Encrypted private messenger

Jami

به اشتراک بگذارید، آزادانه و خصوصی

Element Classic

Previous generation Element

Cheogram

Chat on the Jabber network (XMPP protocol); focus on features for gateway users

another.im

Yet Another Conversations fork but...

monocles chat

is a full-featured XMPP chat client

Ermis

Ermis M is an open-source, privacy focused mobile chat application.

Jitsi Meet

Instant video conferences efficiently adapting to your scale

Mumla

Voice chat on Mumble servers

Snikket

Personal messaging app for groups, with a self-hostable open-source server

Linphone - open source SIP client

SIP (VOIP) phone

Meshenger

Voice- and video phone App for off-the-grid scenarios.

ThreatScoopOnionChat

A Forked Version focused on privacy from SESSION

Sipdroid

A SIP (VOIP) client

Databag

A federated chat client designed for privacy and selfhosting.

StoneAge

A self-hosted P2P messenger - you will need an S3 bucket to use it

unofficial Stud.IP-app

An unofficial app for Stud.IP systems.