&gt; <i>It&#x27;s free(ish)</i><p>The free tier has a very limited history, which defeats the point of using Slack, since you lose your history. And there&#x27;s really no point in using Slack if you don&#x27;t have a history you can rely on, might as well use IRC.<p>And once you start paying, $7-$15 per user&#x2F;month is not what I&#x27;d call cheap. It&#x27;s cheap compared to a salary, but such costs pile up.<p>&gt; <i>Voice&#x2F;Video via numerous integrations including Bluejeans, Appear.in, Skype, Hangouts, you name it.</i><p>Which is another way of saying that it doesn&#x27;t solve the problems that Skype does, so it&#x27;s not an alternative.