AppDynamics is a vendor that sells solutions broadly covering the application performance monitoring (APM) and IT Operations Analytics (ITOA) space. Essentially, the company helps organizations get a handle on how their applications and infrastructure are working so they can ensure the best possible performance for the various stakeholders. As such, AppDynamics is in a busy space — companies like New Relic and Datadog essentially do the same stuff.
That isn’t necessarily a bad thing — after all, there are lots of applications and a ton of infrastructure to be monitored. Plenty of room for everyone.