Agoda.com takes the award for most improved booking site. Two years ago, Thailand-based Agoda was known for being the internet’s top specialist in Asia—but only Asia; the site ranked number seven overall. Since then, this Priceline-owned booking engine has massively increased its offerings around the world. Agoda now even outperforms corporate cousin Booking.com on some metrics, including the number of hotels found in city centers (though Booking.com still boasts a larger stable of downtown options in the less expensive brackets). If only Agoda could improve its middle-of-the-road domestic results and add better filters, it just might take the top spot.