Betfair is the world's leading betting exchange, a concept it pioneered.

All bets on Betfair are placed there by users who either want to bet for a selection or outcome in the normal way (back), or bet against a selection or outcome (lay). Bets are matched between people with opposing views.

In addition to the exchange Betfair has an established games portfolio, including Betfair Poker, Betfair Casino and a number of exchange-enabled games.