Is there a site online where i can see a full list of companies that offers house insurance?

No, because not all companies offer insurance in all states, and many do not offer coverage out of hte country.

If you’re looking for a particular state, you can go to that state insurance department’s website, and they usually have posted the companies licensed to do business in that state.

Keep in mind, however, that some companies who are NOT licensed to do business in that state, will still write coverage for houses (not a true homeowners package policy), so it’s not all inclusive.

If you wish to put in the 150 hours or so of work it’s going to take to compile the list, and post it on the internet for free, feel free to do so.

This is a good one:

No doubt the easiest way to get insurance quotes is on the web.
Why would you waste your time on the phone calling around?
the last time i needed quotes on insurance i used one of these comparison sites and it was great.
this is the site i used and it was quick like less than 5 mins.
The last thing I want to do is listen to elevator music while waiting for a salesman.
Anyway I got good quotes and ended up saving money so I was happy.
So shop around and compare quotes which is easy on the net.
Good starting point is at this site.

Good luck.