We've had zero issues so far with scalability. We're now an international company and we've had no issues. 

There is the common stuff that isn't related to Tenable. If you have, say, a really small pipe to a remote office, naturally you're going to have lesser performance. Or if you're scanning across the WAN you're going to have higher latency. Aside from those obvious network issues, we've had no issues whatsoever with Tenable's scalability.

It's a scalable solution. We started with 500, and now we added 250 more. Multiple people don't use scanning because the scanning is done by a small team of around two or three people. However, multiple people use the report.

The only issue we've been looking at so far is getting our scan cycles lower. There may be some optimizations needed in the scans, as well as deploying additional scan agents. But it's been pretty simple, as we need more capacity, to deploy more scan agents to various parts of the network. So far we haven't seen any issues with that and we're running with something like 60,000 licenses, to give you an idea of the volume that we're working with.