Some people still think that games on online casinos are from the casino teams themselves but those games are from software providers, is this valid or not.
You remind me of one of the sources I've read, with the title:
TOP 10 ONLINE CASINO GAME DEVELOPMENT COMPANIESIf it is related to your question, it is clear that it is valid, for example:
In fact, all gambling establishments use one or more of the same software, and the only thing that adds originality to them is branding.
If you look at the quote above, of course there is no doubt that software and companies have a role in slot games, poker etc.
This statement can be strengthened again by the statement below, which has been done by the MICROGAMING company.
The Microgaming company is the first and one of the most popular developers of casino games (slots in particular). The brand began its work in the 90s and earned its name by an innovative approach and performance. Microgaming was founded in South Africa (Durban) in 1994. A little later, the main office was transferred to Great Britain (Maine). In our days, the company’s representatives are located all over the world, and the software is available in more than 600 casinos and poker rooms.
You can see more and more companies providing various games to existing online casinos, in the source above top 10.