In Version 1, customers are charged per Organization with restrictions on what sites can go within the same Organization. From Version 2 onwards this was simplified by charging for each individual site, irrespective of which Organization it is part of.
Customers on Version 1 have some limitations to be aware of:
Paying in-app for annual plans (which benefits from a 10% discount);
Making use of our Sampling Visualization Tool;
Taking advantage of Premium features, including Always on Recordings.
As Hotjar evolves and we improve our offering further, new functionality that is built might be added to the list of limitations.