I was a bit hesitant first when our company first started using Flowdock (a Slack competitor), but it turned out to be just great. For example: flows (or chat r

I was a bit hesitant first when our company first started using Flowdock (a Slack competitor), but it turned out to be just great. For example: flows (or chat rooms) with inbox for integrations to e-mail, GitHub, CI and so on -- discussion can be directly related to a certain item, such as a failed build! And of course, discussion threads. This is something Slack still doesn't have, and is a one of the reasons to stay with Flowdock instead. Everyone knows what happens with IRC channels when there's hundreds of people and multiple simultaneous discussions. Good luck trying to follow the conversation if you weren't following it realtime. That said, it sadly seems that Slack will eat the whole pie, and it is probably the most future-proof choice at the moment.