The following blog post by Tom Gorski from SaaS Genius outlines 21 of the most important SaaS Startup Metrics
This blog is well worth a scan as it breaks key metrics down into different buckets. I think trying to measure 21 KPI’s is a little too many so would take the view that it is best to zone in on a smaller subset depending on where your SaaS startups is in its lifecycle. The article breaks the metrics down into three main buckets to help with this.