Every casino advertises great payouts. We measured the actual RTP builds served on 382 popular slots across 6 crypto casinos — the difference between the best and worst is smaller than you'd think, and more important than it looks.
Search for "high RTP casino" and every result will happily sell you a list. The uncomfortable truth: a casino's RTP is not a single number. It is the sum of thousands of individual choices — one per game — about which certified RTP build to switch on.
We measured those choices. Across 382 cross-checked slots and 6 crypto casinos, here is how close each casino stays to the best available build of every game:
| Casino | Games measured | Avg below best build |
|---|---|---|
| Stake | 317 | 0.03pp |
| Shuffle | 281 | 0.03pp |
| Rainbet | 315 | 0.04pp |
| Duelbits | 271 | 0.04pp |
| BC.GAME | 218 | 0.07pp |
| Gamdom | 205 | 0.08pp |
The spread between first and last place is five-hundredths of a percentage point on average — tiny. But averages hide the individual games where it matters: Super Flip runs 2.02 points lower at one casino than at two others, and 24% of the games we checked show some divergence. The right question is not "which casino has high RTP?" but "which casino runs the best build of the three slots I actually play?"
That is exactly what our tools answer:
One honest caveat: our measurement covers the games and casinos in our snapshot (measurement date 2026-08-11), not every title in every lobby. Builds can also change over time — which is why we keep the snapshot updated and date every figure we publish.