There is no single answer to this question as different insurance companies tailor their websites to different audiences. Some insurance companies focus on providing a lot of data and resources on their website, while others focus on providing a more user-friendly interface.
Some customer may find Company A's website to be the best because it is packed with data and resources. Other customers may find Company B's website to be the best because it is much simpler to navigate.
It really depends on the individual customer's preferences as to which insurance company has the best website.