Slack is a pioneer in introducing chat apps for workplaces as an alternative to email communication
Google comfortably introduce the app to the general consumers, who in turn use the same tool in their work environments
Microsoft is preferred by several enterprises for its standard and quality of collaboration features, products, and services all in one place.
Discord is the only best choice for enterprises that prefer discussion via voice calls over text messaging
Mattermost is an open-source chat tool built with enterprise-centric features that work best for teams involving secure data transfer