Betfair Exchange is the world's largest and most liquid betting exchange, launched in 2000 and now owned by Flutter Entertainment. It operates as a peer-to-peer marketplace where bettors can both back (bet for) and lay (bet against) outcomes in thousands of sports markets daily. Rather than betting against a bookmaker, Betfair users bet against each other, with Betfair earning commission on net winnings.
Liquidity sets Betfair apart from all other exchanges. Major horse racing markets see hundreds of thousands of pounds matched in the minutes before a race. Premier League football markets can have millions of pounds in matched bets across a fixture. This liquidity means large stakes can be placed at competitive odds without significantly moving the market.
Key features of Betfair Exchange:
- Back and lay: full two-sided market participation
- In-play trading: markets remain open during events, with prices updating in real time
- Betfair SP: automated starting price for unmatched racing bets
- Cash out: settle bets before events conclude
- API access: third-party applications and bots can connect to Betfair markets
- Historical data: market data archives available for analysis
Third-party software has built an ecosystem around Betfair. Tools like Bet Angel, Geeks Toy, and Gruss allow manual and automated trading with advanced order management, charts, and automation. Professional traders use these tools to operate at speeds and precision impossible through the standard website.
Example
You use Betfair Exchange to trade the pre-race horse racing market. A horse opens at 6.0 and you back £100 at that price. As money comes in, the horse shortens to 3.5. You lay £100 at 3.5, locking in a guaranteed profit of approximately £58 regardless of the race result — a classic back-to-lay green-up trade.