Slack (software)

Slack
Original author(s)Stewart Butterfield, Eric Costello, Cal Henderson, and Serguei Mourachov
Developer(s)Slack Technologies (Salesforce)
Initial releaseAugust 2013 (2013-08)
Written inElectron (C++, JavaScript, TypeScript, React, Redux, etc.), Hack (backend)
Operating systemMicrosoft Windows, macOS, Linux, iOS, Android
Available in12 languages
List of languages
Chinese (Traditional), Chinese (Simplified), English (UK), English (US), French (France), German (Germany), Italian (Italy), Japanese (Japan), Korean (South Korea), Portuguese (Brazil), Spanish (Latin America), Spanish (Spain)
TypeCollaborative software
LicenseProprietary
Websiteslack.com

Slack is a cloud-based team communication platform developed by Slack Technologies, which has been owned by Salesforce since 2020. Slack uses a freemium model. Slack is primarily offered as a business-to-business service, with its userbase being predominantly team-based businesses while its functionalities are focused primarily on business administration and communication.