Slack is a cloud-based team collaboration platform developed by Slack Technologies, now a part of Salesforce. It offers a centralized workspace where teams can communicate through organized channels, direct messages, and group chats, effectively reducing reliance on traditional email.

Beyond messaging, Slack integrates with over 1,700 third-party services, including Google Drive, Trello, and GitHub, allowing users to streamline workflows and automate tasks. Features like file sharing, searchable message history, and customizable notifications enhance team productivity. Additionally, Slack supports voice and video calls, including the "Huddles" feature for quick, informal discussions. Available on multiple platforms, including Windows, macOS, Linux, iOS, and Android, Slack caters to diverse organizational needs, from small businesses to large enterprises.