Slack is a cloud-based team communication platform organized around channels, direct messages, and integrations. It enables persistent, searchable conversations across distributed teams and integrates with hundreds of third-party tools. Slack is widely adopted in software engineering, business, and research organizations for coordinating asynchronous and synchronous collaboration across time zones. It is particularly relevant in Software Engineering, Business, Education and Design.

Slack supports distributed, co-production and open source collaboration and is suited for small teams, organizational settings and multi-organization networks in remote and hybrid settings.

Slack is classified as a well-documented tool, indicating broad adoption and available documentation. It is a proprietary platform, available on Web, macOS, Windows, iOS.