just look at any HN discussion about Slack, which will have a Slack vs IRC segment. This is a particularly long one <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10486541" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10486541</a>