Simple, fast and free. We empower people and companies to connect intellectually and emotionally through online communities, by providing a technically excellent, open and extensible discussion platform.

Make work life simpler, more pleasant and more productive. Slack is the collaboration hub that brings the right people, information, and tools together to get work done. From Fortune 100 companies to corner markets, millions of people around the world use Slack to connect their teams, unify their systems, and drive their business forward.

Discourse is an open source Internet forum and mailing list management software application founded in 2013 by Jeff Atwood, Robin Ward, and Sam Saffron.

NodeBB is modern forum software that combines all the communication tools of today's mobile and social web with the deep community engagement of classic Internet bulletin boards. Built on the high-performance Node.js platform, NodeBB can scale to power the largest and most active brand communities.