Interestingly, I use Hipchat with one team I work with and Slack with another, and far and away prefer Hipchat. The Mac Slack app feels like a web page inside a chromeless browser window. The Hipchat Mac app feels like a real app (albeit one that doesn't really comply with all of the Mac UI conventions).
>Mac Slack app feels like a web page inside a chromeless browser window
That's because it actually is just a web page inside a chromeless browser window. Right click and you can inspect and edit the markup.
We switched from Hipchat to Slack for reasons that seemed to amount to little more than hype about it in the tech world. It's fine. I don't think it has had any real effect on productivity or collaboration, and I really don't see the 'amazing' benefits that Slack fans tout.
In my opinion all of the various integrations that people get so excited about in Slack basically amount to constant noise that I can't filter out or defer the way I can with email notifications.
