Offering a selection of more than 10 million listings from around the world, Pet Friendly Accommodations has one of the largest accommodation databases currently available. Their partners include Booking.com, HomeAway, VRBO, and AirBnb, meaning they provide not only hotels, but motels, hostels, holiday homes and private lettings as well. They compare a range of pet-friendly properties all in one place and, according to their website, have helped over 3.3 million travelers find a place to stay.