Is this hotel cheaper on another site?
Type the hotel and your dates. We check every booking site Google Hotels lists, show each price all-in when the sites report taxes and fees, and tell you whether the cheaper one names the same room. Free, no install, works on your phone.
Get this check on every hotel page you open. When you open a hotel with your dates on Booking.com, Expedia, Hotels.com, Agoda or the hotel's own site, the free Underbook extension runs it on that page by itself.
It sends the hotel name, its town, your dates and party size to our price service (privacy).
Already booked this stay?
How Underbook is free: if you book through a site we link to, we may earn a small commission from that site. It never changes which prices we show or their order.
How the check works
- Every site Google Hotels lists for that hotel and dates, including the lesser-known ones where the lower prices usually are.
- The going rate is the price most sites agree on. A site 5% or more below it is flagged as cheaper.
- Same room or not. We compare the room each site names. "Same room name" only when the names match (strong evidence, not proof); otherwise we show you which room the lower price is for, so you can judge. Many cheap listings name no room at all. We measured how often, on 7,044 hotel prices.
- All-in prices include taxes and fees when the sites publish them. When no site shows a before-tax rate, we say fees may be missing.
- We never book anything and never see payment details. You book on the site you choose.