Instant Messengers Page 2 of 17

Lightweight chat platform for gamers and teams, offering low-latency voice and video, unlimited text channels, task management, and privacy-focused messaging.

Open-source messaging platform with real-time group, direct, and private chats, file sharing, video conferencing, custom integrations, and self-hosting.

Secure messaging, free calls, group chats up to 250, emoji reactions, disappearing messages, low-cost international calls, rich media and community channels.

QUIK is an open source replacement to the stock messaging app on Android. It is a continuation of QKSMS.

Digital workspace organizer that allows you to unify many applications, all in one place. Perfect for those who care about productivity while working with many business and personal apps.

Linphone is one of the most famous open source softphones in the world. It is fully SIP-based, for all calling, presence and IM features.

Multi-platform encrypted messenger supporting one-to-one and group chats, file and image sharing, decentralized open-source design, and ad-free nonprofit operation.

Conversations is a privacy focused, open source XMPP Texting [Jabber] client for Android 4.0+ smart phones with wife-approved easy encryption [OTR, OMEMO, or GPG].

Offers high-quality video conferencing and screen sharing, supporting up to 100 interactive participants with features like whiteboard collaboration.

QKSMS brings a refreshingly beautiful and responsive Material Design touch to the stale state of text messaging.

Adium is a free and open source instant messaging application for Mac OS X, written using Mac OS Xs Cocoa API, released under the GNU GPL and developed by the Adium team. Based on the libpurple protocol library, Adium can connect you to any number of messaging accounts on any...

Matrix-based, open-source chat client offering secure group and direct messaging with end-to-end encryption, organized channels, minimal clutter, and modern design.

Franz is a free messaging app / former Emperor of Austria and combines chat & messaging services into one application. Franz currently supports Slack, WhatsApp, WeChat, HipChat and many more. You can download Franz for Mac, Windows & Linux.

ArcaneChat is a Delta Chat client and was created with a focus on usability, good user experience, and saving data plan. Also the app usually experiments with new features that eventually might get added to the official Delta Chat client.

Trillian is an instant messaging app that works on phones, tablets, and desktops while keeping your chats neatly synchronized between all of them! We think conversation should be easily shared between all of your devices, not trapped as text messages on your phone.

Offers group video calls, voice calls, and instant messaging with photo sharing, real-time notifications, and location mapping for seamless connectivity.

XMPP, or Extensible Messaging and Presence Protocol, is an open standard for instant messaging and real-time communication, allowing for message exchanges between any two entities on the Internet. It's known for its decentralized and extensible nature.

Cross-platform XMPP client with customizable interface, encrypted chats (TLS, OpenPGP, OTR, OMEMO), file sharing, audio/video calls, and theme support.

Messages is Google's communications app for Android to helps send and receive SMS and MMS messages. You can also send group texts as well as your favorite pictures, videos and even audio messages to your contacts.

An alternative Telegram client based on TDLib, with higher speed, slicker animations and experimental features.

Berty is a secure peer-to-peer messaging app that works with or without internet access, cellular data or trust in the network. Berty is a privacy-first messaging application built on top of the Berty Protocol.

WeeChat is a free chat client, fast and light, designed for many operating systems. It is highly customizable and extensible with scripts.

Empathy is a messaging program which supports text, voice, video chat, and file transfers over many different protocols. You can tell it about your accounts on all those services and do all your chatting within one application.

Secure communication for individuals, teams, and large organizations.

LINE is transforming the way people communicate, closing the distance between family, friends, and loved ones for free.