Piri Ecobnb has very clear 10 criterias, it makes much easier to find the place.
There are a few of these kind of websites out there, but they all seem to be mainly filled with places to stay in the same few locations, like you said Italy, sometimes Spain, and a few others.
Really often if people want to go to Estonia, or Romania, or other random place and then look at a site like ecobnb, they see maybe one or maybe no places in the whole country and quickly end up back at booking.com where they have a lot of affordable choices and they can book it in a minute with just a few clicks.