Slack is a cloud-based collaboration and messaging platform designed for teams and organizations to communicate in real time. Launched in 2013 by Stewart Butterfield and his team, Slack offers channels for topic-based discussions, direct messaging, file sharing, and integrations with hundreds of workplace applications. The platform has become a widely used tool for remote and hybrid work environments. In 2021, Salesforce completed its acquisition of Slack to enhance its enterprise communication and productivity offerings.