Communication

Slack is a workplace communication platform built around channels, direct messages, integrations, and searchable conversations.

Microsoft Teams combines chat, video meetings, and file collaboration, tightly integrated with Microsoft 365.

Discord organizes communities and teams around text channels, voice rooms, and real-time conversation.

Mattermost is an open-source team messaging platform built for organizations that want to host and control their own chat infrastructure.

Zoom is an AI-integrated work platform unifying video meetings, team chat, phone/VoIP calling, and collaborative docs and whiteboarding into one product suite.