It might be interesting to create a follow-on study of business benefits realized by this roundup of tools.
A single innocuous tool that doesn't rate highly according to your scoring methodology could have delivered a tremendous cost-savings or revenue windfall for a company-- which is ultimately the only metric that matters.
I've been sitting on a few case studies that exemplify these business gains. One of which was a clever integration of GroupSwim with SFDC. Both of which that didn't make your chart.
Fantastic chart of the landscape though. Bravo!
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