Yes it’s unfortunately standard for expensive scanners too.

Our goal was to make something easy to run and deploy with similar results to something like openvas or Nessus.

I personally think accuracy issues are because security vendors don’t want to show that their expensive software found nothing, so they dial down the accuracy. This works using the same methods as a Nessus, banner grabbing and indexing issues.

We are going to keep working on this and look for ways to make it more accurate, but I’d say our results with this versus our expensive scanners was pretty much the same.