A casino operator runs the site and manages your account, while a slot provider...

https://wiki-dale.win/index.php/What_Is_a_Slot_Game_State_in_Plain_English%3F

A casino operator runs the site and manages your account, while a slot provider makes the game. Provider names show who built each title and help you compare games in a catalogue. Visuals and sound may vary, but they do not change the game rules.