Slack is a convenient messaging platform, even though there's nothing particularly innovative about it. It's essentially a web-based IRC client with a few obvio

Slack is a convenient messaging platform, even though there's nothing particularly innovative about it. It's essentially a web-based IRC client with a few obvious enhancements (object embedding, built-in cross-channel search, etc.). Slack is one of the most popular things to clone now that people realize that businesses will use an IRC clone if it's packaged correctly, so I wouldn't go putting all your eggs in the basket of Slack's longevity as a company.