Best Tracking Software 2016?

And why? Would love to see more detailed comparisons of all the options.

Update: Props to Thrive, FunnelFlux, Prosper202, Voluum and AdsBridge for chiming in on this thread. Awaiting others. Let’s hope this healthy competition drives them to make better, faster solutions.

Update 2: See Amy’s in-depth review of the top 3 trackers from this poll – Voluum, Thrive, and FunnelFlux.