Although fair enough in general, New Relic is public with a market cap of $3.5b, and given my experiences with New Relic and Datadog, I wouldn't be surprised if Datadog was easily worth twice New Relic. :) (Certainly they're a lot more than twice as nice to use...)
I would imagine a non-trivial amount of revenue for most SaaS businesses is highly dependent on VC-funded startups. If VC money dries up, expect all SaaS businesses to suffer.
They may be great, but are they 7.8 billion dollars of great? For comparison, Hanes (the underwear people) has a 6 billion market cap and Dish Network is 18 billion.
The $15 a host thing was only true before they started charging for custom metrics. Now they want you to add APM to your plan and it's much more expensive.
I'm transitioning off of DataDog right now because of this change. My contract came up for renewal and they want to charge me a TON more because of my custom metrics.
All my custom metrics do is track the time of each request. It's basically APM but I've had it setup for years, way before they rolled out APM. So yeah, $15 a host would be awesome if that's actually what the price was. But why would you pay $15 a host and only get CPU/memory charts? That stuff is built into AWS... So I'm not even sure what the $15 gets you that is actually useful.