Zulip

Overview

Zulip is an open-source team chat platform designed for efficient real-time and asynchronous communication, using unique topic-based threading to keep conversations organized, searchable, and easy to follow for distributed teams and communities.

Key features

• Topic-based threads
• Real-time chat
• Asynchronous communication
• File sharing
• Powerful search
• Integrations
• Mobile apps
• iOS
• Android
• Self-hosted
• Open-source
• API access