The GVI is a 0–100 score per bookmaker that blends gubbing risk, welcome-offer value, reload-offer activity, and operator reliability. Refreshed monthly. Read the full methodology →
Last updated 9 May 2026
| Grade | |||
|---|---|---|---|
| 1 |  BoyleSports | 64 | C |
| 2 |  Coral | 63 | C |
| 3 |  Ladbrokes | 63 | C |
| 4 |  Betfred | 62 | C |
| 5 |  NetBet | 58 | D |
| 6 |  Virgin Bet | 58 | D |
| 7 |  Bet365 | 58 | D |
| 8 |  William Hill | 57 | D |
| 9 |  Paddy Power | 57 | D |
| 10 |  Unibet | 56 | D |
| 11 |  BetVictor | 55 | D |
| 12 |  Sky Bet | 54 | D |
| 13 |  Betfair | 48 | F |
| 14 |  BetUK | 47 | F |
| 15 |  888sport | 36 | F |
Each bookmaker is scored 0–10 on four components and combined via a fixed weighted formula. Gubbing Risk and Reload Value carry the most weight (3× each); Welcome Offer and Reliability carry the least (2× each). The composite is rounded to a 0–100 GVI score and assigned an A+ to F letter grade.
Three of the four components (welcome offer, reload, gubbing) are computed from data we already collect — public offer scrapes and anonymised member reports. Reliability is a manually-reviewed rubric updated quarterly.
Read the full methodology →The free tutorial steps you through the welcome offer at every bookmaker on this list — qualifying-bet markets, lay odds, exact stakes. Reload-offer EVs and a per-bookmaker oddsmatcher filter are part of Premium.
