I think Tawk does a pretty good job of handling the basics. Most of our customers operating at any scale end up integrating Olark with a CRM such as Salesforce or a Helpdesk solution. We also have excellent cobrowsing, and a there's also a lot you can do with our api, http://www.olark.com/api.
It's also important to remember they will need to monetize eventually.
they are already monetizing, just not for the software. Olark is great, but I am sorry to say their app kills Olark..and their new dashboard is feature packed
It's also important to remember they will need to monetize eventually.