Online casinos use software that is specially developed and applied to a multitude of networks throughout the community. Quite often you will see similarities in the graphics and play movement between two or more casinos. This is usually because the software was developed by the same company and they could be on the same gaming network. Currently there are five major online casino developers, but there are plenty of smaller companies that are on the horizon and could be larger contenders down the line.

In 1994 the first online casino gaming software was developed by a company owned and operated in South Africa. Microgaming System’s Ltd. is the company that developed it and since then they have added an online poker product to their repertoire of high-quality gaming software. Their casino software offers players slot machines, blackjack, and roulette. Their poker software offers play in Texas Hold’Em, Omaha, Seven Card Stud, and Five Card Stud versions. Both the casino and poker software will accept American Dollars, British Pounds Sterling, and Euros. Currently there are over eighty Microgaming online casinos and the number of poker rooms using their software is quickly growing.

Microgaming was joined in the software world in 1999 by the Dutch company Playtech. The develop casino, bingo, and poker software and they introduced their first online casino in 2001. All of Playtech's online casino and poker rooms take payment methods such as ECO card and Neteller, to name a few. One of the reasons players enjoy the rooms Playtech has developed is due to the unlimited offline play time the sites offer.

RTG – which stands for Real Time Gaming – is an American software developer that was founded in 1998. A small company that is quickly growing, RTG set out to develop the online casino software. So far they have managed to capture some of the most popular and well-playing casino and poker rooms on the Internet. RTG games are played in American dollars only, but like the Playtech sites, they too accept global deposit and withdrawal methods. The software is not as graphic heavy as some of the others and will only take up about 4Mb of hard drive space, which is good for someone who doesn’t have a lot of room left on their computer.

Probably the most secure and stable software provider, Cryptologic online casinos are the few left that will accept players from the United States. They have two affiliates – Wagerlogic which is a software developer for casino software, and E-Cash Direct for financial transactions – and the global deposit and withdrawals methods are accepted on all Cryptologic sites. Games offered at the casino include Baccarat, Blackjack, Video Poker, Craps, Roulette, and Slot Machines. Cryptologic also develops poker-centric rooms as well featuring games such as Texas Hold’Em, Omaha, and Stud variations.

The last of the big online casino software developers is Boss Media. Based in Sweden, they are the oldest of the online casino software makers even though Microgaming was the first one to market their software. The offer both online casinos and poker rooms and all of the accept American Dollars. A few of the casinos accept British Pounds Sterling. Boss Media offers their software in three different versions: light; full; and on CD Rom, a unique offering that is not found anywhere else. Their slot machines come in a variety of themes and the casino offers Blackjack, Craps, Roulette, Baccarat, and other card games. Their poker room offer the usual suspects of Texas Hold’Em, Omaha, and Stud variations.

Each company has painstakingly developed their software to comply with industry standards and uses 128-bit SSL encryption to provide their players with the most security possible to protect all of their personal information.