Slack

Where work happens — the business communication platform that brings teams together.

Slack is the leading business communication platform that transforms how teams collaborate by organizing conversations into channels. Channels can be organized by project, topic, or team, replacing fragmented email threads with searchable, persistent communication. Slack integrates with over 2,600 apps including GitHub, Jira, Google Drive, and Zoom, centralizing notifications and enabling workflow automation through Slack workflows. Features like huddles provide lightweight voice and video calls, while Slack Connect extends channel-based communication to external partners, clients, and vendors. The platform supports rich message formatting, file sharing, threaded conversations, and powerful search that archives every message for future reference. With both free and paid plans, Slack has become the default communication layer for millions of companies from startups to the Fortune 100.