Slack Corp
Slack is an instant messaging program designed by Slack Technologies and owned by Salesforce. Although Slack was developed for professional and organizational communications, it has been adopted as a community platform. Users can communicate with voice calls, video calls, text messaging, media and files in private chats or as part of communities called "workspaces". Slack also uses IRC-style features such as persistent chat rooms (channels) organized by topic, private groups, and direct messaging. In addition to these online communication features, Slack integrates with other software. Slack runs on Windows, Linux, macOS, Android, Windows Phone and iOS.