Dealfia

Groupon is the daily deal websites that serves many major international markets, offering one coupon per day in each these markets. You can’t go anywhere online these days without spotting a Groupon ad. It's theory as we all know - the social features of its deep-discount offers for local merchants — a certain size group had to sign up in order for the deal to be “on” has been the reason for the huge success.

Woot is an American Internet retailer based in the Dallas suburb of Carrollton, Texas. Woot's main website generally offers only one discounted product each day, often a piece of computer hardware or an electronic gadget. Other Woot sites offer daily deals for t-shirts, wine, children's items, household goods, and two other sites that offer various items.