Slot developers
Five studios make the seven slots we profile. Each has a recognisable style.
By Ryan Jessop. Last checked .
Key takeaways
- Five developers, seven slots.
- Pragmatic Play makes three of them.
- Studios supply several RTP versions.
- Lobbies differ by casino.
The five studios
Developers and slots
| Developer | Slots | Reported at |
|---|---|---|
| Pragmatic Play | Big Bass Bonanza, Gates of Olympus, Sweet Bonanza | PlayOJO, Coral, Ladbrokes, Casumo and 10bet |
| NetEnt | Starburst | Coral, Casumo, PlayOJO and 10bet |
| Play'n GO | Book of Dead | Casumo |
| Blueprint Gaming | Fishin' Frenzy | Coral |
| Eyecon | Fluffy Favourites | 10bet |
Browse the same seven slots by theme or by mechanic.
From studio to lobby
A studio builds a slot and has it tested. It then offers the game to casinos, often through an aggregator, with a choice of RTP settings. The casino picks a setting and adds the game to its lobby. That is why the same title can be present at one site and missing at another, and can return slightly different percentages at two sites that both carry it.
Average RTP by developer
| Developer | Slots profiled | Average default RTP |
|---|---|---|
| Pragmatic Play | 3 | 96.56% |
| Play'n GO | 1 | 96.21% |
| Blueprint Gaming | 1 | 96.12% |
| NetEnt | 1 | 96.09% |
| Eyecon | 1 | 95.39% |
Across the slots we profile only; not a studio-wide figure.
Why the developer matters
The studio writes the maths. It decides the RTP options, the volatility and the maximum win, and the casino only chooses among the versions offered. Knowing a studio's habits tells you a good deal about a slot before you open it.
Slot figures are developers' published defaults, each confirmed against two sources; a casino may run a lower RTP. Offer terms dated 5 October 2026. How we check. 18+. Free help: 0808 8020 133 or safer gambling.
Frequently asked questions
Who makes online slots?
Independent studios that supply games to casinos.
Which developer is biggest in the UK?
Pragmatic Play is the most widely reported among our partners.
Do developers set the RTP?
They supply the options; the casino picks one.