Slack is a messaging app for teams which brings all your communications under one strong platform. While no longer using an IRC backend, Slack offers a lot of IRC-like features: persistent chat rooms (channels) organized by topic, as well as private groups and direct messaging (again, historically based on IRC). All content inside Slack is searchable, including files, conversations, and people. Slack integrates with a large number of third-party services and supports community-built integrations.
Teams all over the world who use Slack see an average 48.6% reduction in internal email, giving them more time.
Slack recently debuted ‘Sign in with Slack,’ in what may are calling the the work chat platform’s answer to Facebook Login