Secure Chat!

WhatsApp Messenger is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS. WhatsApp Messenger is available for iPhone, BlackBerry, Android, Windows Phone and Nokia and yes, those phones can all message each other! Because WhatsApp Messenger uses the same internet data plan that you use for email and web browsing, there is no cost to message and stay in touch with your friends.

Riot (formerly Vector) is an opensource interoperable app running on Web, iOS and Android. It is built around chat rooms, both public and private and provides messaging, filesharing, voice and video conferencing (beta on Android and web), integrations to tools like GitHub, Jira, Jenkins and much more soon. Vector is built on the Matrix.org open standard which provides bridges to other systems such as Slack, IRC and a lot more soon. One can use the hosted service or run their own. »

HipChat is an instant messaging service designed for companies and teams. It has persistent chat rooms, one-to-one chat, searchable chat history, file sharing via drag & drop and clipboard, inline image previews, an API, chat over SMS, and more.

Threema is a new mobile messaging app that puts security first. With true end-to-end encryption, you can rest assured that only you and the intended recipient can read your messages.

Zulip is a group chat app.

Wickr is a free end-to-end encrypted text, video, picture and voice messenger with full sender control.

Peerio is a simple way to send private messages and files and store them in the cloud. Everything inside Peerio is end-to-end encrypted by default, meaning no one but you and your intended recipients can access your data. Simply get the app, create an account, and start sending private messages and files using state-of-the-art encryption!

Stackfield's unique cloud platform combines e-mail, instant messaging, project management and many other useful applications of everyday life. Whether thread-based chats, fast and secure data exchange with colleagues or the dynamic editing of complex projects, Stackfield enables the user to easily and intuitively create an individual and self-contained Stack for every challenge.Individual Stacks can be set up by choosing from a wide range of modules. To ensure the security of the data all servers are located in Germany. Furthermore all data are protected by a client-side encryption method developed by Stackfield, which combines different encryption methods. Therefore all data of the users are already encrypted in the browser and never leave the computer unprotected. »

Open source instant messaging server and clients. Backend in pure Go (license GPL 3.0), client-side binding in Java for Android and Javascript (license Apache 2.0), persistent storage RethinkDB. JSON over websocket (long polling is also available). Tinode is meant as a replacement for XMPP. Overall it's a lot like open source WhatsApp or Telegram.

With Crugo you can communicate, share and organize anything securely through the use of groups. With groups you can chat in real time, share files, monitor RSS feeds, create to-do lists and even organize calendars.Crugo focuses around groups. With groups you are in control. Decide what visibility you want and choose from a range of features to define each group based on your needs. Then simply invite others to join. It's that easy!

Chanty is a simple business messenger for seamless communication and collaboration powered by AI. We help small teams to become more productive by featuring instant messages with an unlimited searchable history, robust file sharing and uniting notifications from multiple services in a single place.