In kpilibrary.com you have access to all KPIs listed in the library, for free, however, you do not have insight in the popularity i.e. most-used KPIs by your peers. Further more, in kpilibrary.com you have access to benchmark scores of KPIs if you have submitted a benchmark survey, however in KPI Benchmark you have access to any benchmark score without submitting your own scores. And in KPI Benchmark you can easily search for KPIs based on business strategy.