used both, hipchat and slack. both underwhelmed me. I still don't understand the hype around them, both provide their full functionality only in the browser, th

used both, hipchat and slack. both underwhelmed me. I still don't understand the hype around them, both provide their full functionality only in the browser, their clients having quite a few deficits. zulip. mentioned in another thread, looks promising, don't know if it can keep its promises