If you are just looking for metrics, there are a lot of tools that do this. I would suggest looking at analytics - that's where you are going to have to be soon, if you want to be proactive The APM Magic Quadrant from Gartner is a good one to review. That has a lot of…

All three are good tools for monitoring web application transactions. Of course, CA has a much broader set of capabilities than the other two - can monitor networks, servers, databases, etc. AppDynamics provides a product that you can use in-house. NewRelic is only a SaaS…