Published on March 26, 2026
Ask who made a slot and the honest answer is usually four companies deep. A casino brand rarely builds anything: it licenses a catalogue, which someone else assembled, from studios that never speak to it directly, and the whole arrangement is audited by a laboratory that works for none of them. Knowing the chain is useful, because every link in it leaves a trace you can check.
The studio
The studio writes the game: the mathematics, the art, the sound and the feature. It decides the RTP, usually shipping a title in several configurations so operators can pick one, and it publishes the paytable that ends up in the information panel. Large studios release dozens of titles a year; small ones survive on one mechanic that nobody has copied yet. It is worth reading alongside What an Online Casino Actually Consumes, and Why “Green” Claims Are Hard to Check.
The aggregator
Very few operators integrate studios one by one — that is a separate technical project each time. Instead they connect once to an aggregator, a company that has already integrated hundreds of studios and resells the whole catalogue through a single interface. This is why unrelated casinos show almost identical lobbies: they are often looking at the same aggregator’s shelf.
The testing laboratory
Before a game can be offered under a licence, its random number generator has to be certified by an accredited laboratory — eCOGRA, Gaming Laboratories International and iTech Labs are the names that come up most often. They sample millions of outcomes and check the distribution against what the declared mathematics predicts. Their certificates are published, and they are issued to the studio and the game, not to the casino.
The operator
What is left for the operator is the account, the payments, the licence, the lobby order and the bonus terms. That is not a small list — it is most of what a player’s experience consists of — but it does not include the games themselves. A related case is examined in What Slot Audio Is Actually Doing.
| Who | Decides | Where you can check it |
|---|---|---|
| Studio | RTP, volatility, features | Information panel inside the game |
| Aggregator | Which catalogue the lobby shows | Rarely disclosed publicly |
| Laboratory | Whether the generator is certified | Certificates published by the lab |
| Operator | Bonus terms, payments, licence | Footer and the regulator’s register |
A casino that describes a slot as “ours” is describing a licence to show it, not authorship. The studio’s name is in the game’s own information panel, and it is the one that counts.
How to check a provider in under a minute
- Open the game and find the information or paytable panel. The studio is named there, usually on the first or last page, alongside the RTP.
- Search the studio’s own site for the title. A real studio lists its catalogue and often publishes the RTP configurations it ships.
- If certification matters to you, search the laboratory’s site for the studio rather than for the casino — the certificate belongs to the game.
- Treat any claim of an exclusive game with the same check. Genuine exclusives exist, but they are still made by a named studio.
Questions players ask
Does the casino make its own games?
Almost never. The overwhelming majority of titles in any lobby are licensed from third-party studios, usually through an aggregator that supplies the whole catalogue at once.
Can an operator change how a game pays?
It can sometimes choose between RTP configurations the studio supplies, which is why the in-game panel is authoritative rather than a review. It cannot alter the certified build itself. The mechanics behind that are set out in How to Read a Slot: RTP, Volatility and the Information Panel.
What does a certificate from a testing lab actually cover?
That the random number generator behaves as declared and that the game pays according to its published mathematics. It says nothing about the operator’s bonus terms, withdrawal speed or licence.
