Last month , TheSuitest became the first hotel booking website to launch a price index . The site is the brainchild of a Goldman Sachs analyst , and contains thousands of bits of data . Kayak and Yahoo Travel offer a similar index for airfares , predicting if a price will rise or fall . The advantage of Kayak 's model is it relies on an enormous amount of data to make predictions . Kayak taps into the billion - plus searches made on its site for its data .
Last month , TheSuitest became the first hotel booking website to launch a price index . The site is the brainchild of a Goldman Sachs analyst , and contains thousands of bits of data . Kayak and Yahoo Travel offer a similar index for airfares , predicting if a price will rise or fall . Kayak taps into the billion - plus searches made on its site for its data .