Zoho Cliq simplifies your team communication with organized conversations, information that's easy to find and by connecting to the tools you love. Transform ideas into reality with your team. With channels, your team communication is visible, transparent and efficient.

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:

Flock is the fastest growing team messenger and loved by over 25,000 companies globally. It also comes with its powerful platform, FlockOS.

Zero Knowledge, end-to-end encrypted collaboration tool for teams and businesses. Reviewable source code. Python wrapper for bots & integrations. Encryption white paper. Native offline mode. Faster file-sharing. Built for enterprise.

Beat - is a simple, step-by-step project management. It helps you to focus on current task, with no mess or distraction. Chat with your team, comment and discuss every piece of your project, share files and create your own beat.

IceWarp integrates all communication & collaboration features in one unified solution. Available in cloud or for on-premises deployment, IceWarp is a great tool to share and exchange all information and ideas online, offline or via mobile devices.

MyChat is an instant messenger that works in LAN and over the Internet. Reliable in slow connections. Do not require too many system resources. The program has its own server where a user control everything happening in the chat.

Get more done – with Grape (also called ChatGrape). Grape is an European Business-Messenger with an On-Premise and Cloud solution. It is GDPR compliant and prioritizes data security and safety.

Moxtra provides cloud-based project binders for managing, presenting and sharing your projects/events/parties/trip... from your iPhone/iPad.

Team.biz is a messaging service for companies, teams, and professionals. Team administration, group messaging, add guests, text (SMS and MMS), open and private topics, drag & drop image and doc sharing, edit messages, view message history, and more.

Stackfield is a Slack-alternative for chat, collaboration, calendaring and file-sharing. It enables encrypted chatting (end-to-end encryption) and is hosted in Germany.

Unifying Communications Across Platforms and Devices.