Mattermost
by Mattermost Inc.
Free
Self-hosted, open-source team messaging built for high-security environments.
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Best Enterprise Communication
Unified communication suites for large organizations.
Microsoft Teams
by Microsoft
Free
Microsoft's unified hub for chat, meetings, and Office 365 file collaboration.
Rocket.Chat
by Rocket.Chat Technologies
Free
Open-source team messaging you can self-host for full data control.
Webex
by Cisco Systems
Free
Cisco's enterprise-grade unified communications suite with AI meeting features.
Zoom
by Zoom Video Communications
Free
The most-used video conferencing platform for meetings and webinars.