Hello, we've used Visitor Track for the last several years. It does not tell you who specifically was on your website, only the companies that have been on your site. I believe it identifies the IP address and then links that to the company name, so it only works if they're accessing your site from their corporate network.
It will also provide you links to contacts at the company, but again, this doesn't tell you the actual person who visited your site. They get the contact details from ZoomInfo - so if there aren't any contacts from the company listed on ZoomInfo, there won't be any contact details.
If you are a B2B company like we are, it is useful to know which companies have visited your site, but it is kind of difficult to act on that data. You can't really have your sales team call a prospect and say "hey, someone from your company was on our website...do you know who it was so I can talk to them?"
I am actually researching alternatives to Visitor Track right now. Like I said, it is valuable info, but I don't know if it's worth what we're paying for it.
Let me know if you have any other questions, I'd be more than happy to answer them!