Betfair has been the default answer to 'I want to bet without a bookmaker taking the margin' since the early 2000s. Boromarket is a newer model — a prediction market rather than a betting exchange. The difference matters more than most people realise.
How a Betting Exchange Works
On Betfair, you're matched against another user. You set your odds, they accept them, Betfair takes 5% commission from winning trades. If no one takes your price, your bet doesn't get matched. Liquidity is king — the most popular markets work brilliantly, the niche ones don't.
How a Prediction Market Works
On Boromarket, markets are denominated in probability rather than odds. A 'Yes' share costing 70p means the crowd prices the event at 70% probability. If you think the true probability is 80%, buying at 70p has positive expected value. You're always trading probability, not arbitrary odds formats.
- →Prediction markets: probability-denominated, clear resolution criteria
- →Betting exchanges: odds-denominated, matched against other users
- →Prediction markets allow early exit at current market price
- →Exchanges allow trading in-play; prediction markets focus on pre-event and early exit
- →Prediction markets: better for longer-horizon events and data releases
Where Boromarket Has the Edge
For markets that aren't football match results — economic data, political outcomes, multi-week sports tournament trajectories — prediction markets are a fundamentally better vehicle. The probability framing forces precision in thinking that odds-based betting discourages.
"Asking 'what are the odds?' encourages guessing. Asking 'what is the probability?' encourages thinking."
— Philip Tetlock, forecasting researcher
Where Betfair Has the Edge
In-play football betting, horse racing, and any market where liquidity needs to be enormous and real-time. Betfair's in-play tennis and football markets are among the most liquid financial instruments in sports. Boromarket doesn't compete there — and doesn't try to.
Use the right tool for the job. For economic data, political markets, and multi-event sports tournaments: prediction markets. For in-play football and horse racing: exchanges. They're not competitors, they're complements.