HipChat is described as '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' and is a popular instant messenger in the social & communications category. There are more than 50 alternatives to HipChat for a variety of platforms, including Web-based, Android, iPhone, Windows and Mac apps. The best HipChat alternative is Matrix, which is both free and Open Source. Other great apps like HipChat are Slack, Zulip, Mattermost and Rocket.Chat.
LeggoChat is a group or channel based chat platform that is designed to be easy to set up for any casual, or formal settings and discussions. Users can choose to have their messages logged and stored, or otherwise. No user accounts are required to get started at all.
VideoMeeting is a free and open source video conference solution built to have video calls and chats using your web browser. It is a pure web application based on WebRTC that can provide communication features within your web browser.
Spain
EU
This app allows to exchange secure messages and communicate instantly with users connected to the same communication server software from mobile and desktop-based messaging clients. Instant messaging is strongly encrypted and archived on the IM server which is privately hosted...
Russia
Free online chat rooms. Create your own chat room, earn karma and direct message.
Dirc is a peer-to-peer web application which uses WebRTC to set up connections between chat participants without requiring a back-end server. The static files can be self-hosted. Other features:
BloomText allows healthcare professionals to send messages and files securely to anyone instantly. Easily replaces the need for fax machines.
Shrtct is a productivity tool for teams, providing in-context communication (chit chat free!) via Shrtct Hashes. It's great for preparing your team, making important decisions, gathering and storing information, planning, debating and hashing it out.
United States
Fast open source Slack desktop app, written in Node.js with native UI powered by the Yue library.
Disposable online chat. With anologue you can quickly and easily engage in an anonymous (or not) linear dialogue with any number of people (within reason). No accounts. No installations.
An IRC-like internet chatroom hosted on ZeroNet, a distributed network. 0rc is a fully distributed website, and messages are shared through peers using the ZeroNet stack. In addition, making a new chatroom website is a simple as downloading the files and cloning the site.
