I think one of the things that got slack going is that they have an actual free tier. I've wanted to use something like campfire or hipchat among dev teams befo

I think one of the things that got slack going is that they have an actual free tier. I've wanted to use something like campfire or hipchat among dev teams before but I wasn't able to get someone to sponsor the lowest tier so we could just try it out. Also the devs were reluctant because everyone was in the same office.