Choose Slack!

We use Jabber as the main communication tool across the whole company, and it solves the basic need of sending messages (and sometimes making calls). However, while Jabber technically gets the job done, I definitely wouldn't recommend it over Slack or even Skype... it's just not as nice! As a product designer, Slack constantly delights me with thoughtfully designed interfaces and features whereas Jabber is just a chore to use. It's not very pretty, and so many UX and UI things just don't work the way you'd think they should.