Adium is a instant messaging application for Mac OS X that can connect to AIM, XMPP (Jabber), ICQ, IRC, Bonjour and more. It supports Encryption, File transfer, Tabbed chat windows and lot more.

Adium - Instant Messaging for Mac

Let's Chat is a persistent messaging application that runs on Node.js and MongoDB. It's designed to be easily deployable and fits well with small, intimate teams. It supports XMPP Multi-user chat (MUC), Multiple rooms, File uploads and lot more.

Lets-Chat - Self-hosted chat for small teams

Briar is a messaging app designed for activists, journalists, and anyone else who needs a safe, easy and robust way to communicate. Unlike traditional messaging tools such as email, Twitter or Telegram, Briar doesn't rely on a central server - messages are synchronized directly between the users' devices. If the Internet's down, Briar can sync via Bluetooth or Wi-Fi, keeping the information flowing in a crisis. If the Internet's up, Briar can sync via the Tor network, protecting users and their relationships from surveillance.

Briar - Secure messaging, anywhere

Molly is a hardened version of Signal for Android, the fast simple yet secure messaging app by Signal Foundation. Back in 2018, Signal allowed the user to set a passphrase to secure the local message database. But this option was removed with the introduction of file-based encryption on Android. Molly brings it back again with additional security features.
 
<ul>
<li>Data encryption at rest - Protect the database with <a href="https://github.com/mollyim/mollyim-android/wiki/Data-Encryption-At-Rest">passphrase encryption</a></li>
<li>Secure RAM wiper - Securely shred sensitive data from device memory</li>
<li>Automatic lock - Lock the app automatically under certain conditions</li>
<li>Block unknown contacts - Block messages and calls from unknown senders for security and anti-spam</li>
<li>Contact deletion - Allows you to delete contacts and stop sharing your profile</li>
<li>Disappearing call history - Clear call notifications together with expiring messages</li>
<li>Debug logs are optional - Android logging can be disabled</li>
<li>Custom backup scheduling - Choose between daily or weekly interval and the number of backups to retain</li>
<li>SOCKS proxy and Tor support - Tunnel app network traffic via proxy and Orbot</li>
</ul>

Molly is a hardened version of Signal for Android, the fast simple yet secure messaging app by Signal Foundation. Back in 2018, Signal allowed the user to set a passphrase to secure the local message database. But this option was removed with the introduction of file-based encryption on Android. Molly brings it back again with additional security features. 

Molly - A fork of Signal for Android with passphrase lock

The world's most private and secure chat - open-source, decentralized, and without global identities of any kind. You can use it from the terminal UI, with all contacts and groups in one window. It is a federated chat system with end to end encryption support and low risk of man in the middle attack. 
 
It solves privacy problem by making both messages and contacts accessible only on client devices, reducing the role of the servers to simple message brokers that only require authorization of messages sent to the queues, but do NOT require user authentication.
 
Simplex messaging protocol (SMP) for messaging via secure persistent queues will serve as the low level protocol for SimpleX chat. It uses different encryption keys for each message queue - the key is passed via existing secure channel - e.g. QR code or another simplex queue.

The world's most private and secure chat - open-source, decentralized, and without global identities of any kind. You can use it from the terminal UI, with all contacts and groups in one window. It is a federated chat system with end to end encryption support and low risk of man in the middle attack. 

SimpleX Chat - Decentralized chat with a focus on users’ privacy

Smooch is the best way to have personal, rich conversations with people on your website or customers on any device. The Smooch Web Messenger will add live web messaging to your website or web app. Customers will be able to talk to you from your website, while you manage conversations using your favorite business systems.

Smooch - Live web messaging to your website or web app

Kontalk is run by a community of volunteers offering servers. Both client-to-server and server-to-server channels are fully encrypted. Users can be safe with end-to-end encryption. This is the official Android client for the Kontalk messaging system.

Kontalk - Instant Messaging Network

Ring is a free and universal communication platform which preserves the users' privacy and freedoms. It is a simple tool to connect, communicate and share. It has support of teleconference, easily join calls to create conferences with multiple participants. It helps to send text messeges during calls or out of calls (as long as your peer is connected).

Ring - Universal communication platform which preserves the users privacy and freedoms

Prosody is a modern XMPP communication server. It aims to be easy to set up and configure, and efficient with system resources. Additionally, for developers it aims to be easy to extend and give a flexible system on which to rapidly develop added functionality, or prototype new protocols.

Prosody - Modern XMPP communication server

Simple encrypted web chat. Powered by socket.io, the web cryptography API. This project is an example of how client side encryption works and how you can integrate it as a chat service. Darkwire server is a Node.js application that requires redis. The Darkwire.io web client is written in JavaScript with React JS and Redux. It uses a combination of asymmetric encryption (RSA-OAEP), symmetric session keys (AES-CBC) and signing keys (HMAC) for security.

Darkwire.io -  End-to-end encrypted instant web chat

Niltalk is a web based disposable chat server. It allows users to create password protected disposable, ephemeral chatrooms and invite peers to chat rooms. Rooms can be disposed of at any time. It supports in-memory / file / Redis as the backend for persisting room and session states.

Niltalk - A multi-room disposable chat service written in Go that uses WebSockets for live communication

Chat.onion is an anonymous and fully encrypted peer-to-peer instant messenger for Android using onion routing (via Tor). Many instant messengers already use encryption to secure message contents, but they can't hide important metadata such as your IP address and who you are communicating with. To hide all your information, including your metadata, identity, and IP address, Chat.onion uses onion routing (Tor) to send each message over several randomly selected proxy servers. Multiple layers of encryption are used to ensure that each proxy only knows it's immediate successor and predecessor, but not the entire message route.
 
Chat.onion users are identified via 16 character checksums of their public keys. To connect with other users, send them an invitation with your ID, show them your QR code, or use your camera to scan theirs.

Chat.onion is an anonymous and fully encrypted peer-to-peer instant messenger for Android using onion routing (via Tor). Many instant messengers already use encryption to secure message contents, but they can't hide important metadata such as your IP address and who you are communicating with. To hide all your information, including your metadata, identity, and IP address, Chat.onion uses onion routing (Tor) to send each message over several randomly selected proxy servers. Multiple layers of encryption are used to ensure that each proxy only knows it's immediate successor and predecessor, but not the entire message route.

Chat.onion - Anonymous and fully encrypted peer-to-peer instant messenger for Android using onion routing (via Tor)

qwebirc is a fast, easy to use, free and open source IRC client designed by and originally just for the QuakeNet IRC network. It supports most ircds out of the box, SSL/TLS support for the browser and server, Multiple channels and queries, Scalability via trivial sharding with sticky sessions and lot more.

qwebirc - Fast, easy to use, free and open source web IRC client

KouChat is an open source, serverless, LAN chat application for the desktop and Android. With KouChat you can chat and send files to other KouChat users on the same local area network. It’s intended to be used on your network at home, the coffee shop, work place or similar, and does not require any setup, Internet connection or servers to function.

KouChat - Serverless, LAN chat application for the desktop and Android.

Discover open source projects across all platforms

Projects