
Mattermost
Mattermost provides self-managed messaging and operational collaboration for teams that need control of communication data, integrations, and repeatable response workflows.
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Mattermost provides self-managed messaging and operational collaboration for teams that need control of communication data, integrations, and repeatable response workflows.

Slack organizes team conversations in channels, connects workplace applications, and supports huddles and AI-assisted work within a persistent communication environment.

Chanty combines employee communication and tasks with newer AI-agent collaboration, including voice-led interaction and shared conversation context.

Twist structures team communication in topic-based threads and channels, with an inbox designed for asynchronous follow-up rather than constant live chat.

Open-source team messaging
Best for Dev teams
Team communication platform
Best for Teams
Simple team chat app
Best for SMB teams
Async team messaging
Best for Remote teams
Threaded chat platform
Best for Dev teams
Team chat and collaboration
Best for SMBs
Free team messaging
Best for Startups
Secure messaging platform
Best for Security teams
Matrix-based messaging
Best for Developers
Community conversations, voice channels and video calls in shared servers.

Website chat and connected customer conversations for sales and support.
Best for Small businesses, Growing teams
Enterprise video conferencing
Best for Enterprises