Nearly all of the major online casino game development groups have some sort of live dealer presence these days. Microgaming, NetEnt, and Playtech all have their own studios in multiple locations around the world, and they all provide different games to their customers.
The biggest names in live dealer games are specialists such as Evolution Gaming and Ezugi. These two groups focus only on the live games, and their quality is among the best in the world. If you go to a big-name casino, it’s likely you’ll see games from one of the above groups.