RJ Lewis Digital
RJ Lewis Digital reviewedFlockReal-time team messenger tool
 Recommended
Pros: 

It's better suited than slack for contractor, client collaboration

Cons: 

The problems inherent with chat apps are not avoided here. The case still hasn't been cracked.

I love that flock is stable, easy to use and has a good base of application integrations. I typically miss flowdock, but the overall collaborative experience is better than slack. Been using a little over 6 mos.- couldn't pick that though

RJ Lewis Digital has used this product for one year.