You can get a good idea of the credibility of an online casino by looking at which software they use. Normally online casinos will tell you which casino software they use on their website. If they use a software brand with a bad reputation and/or seem very reluctant to share information about their software, then you should think twice before you open an account.

Online casinos do not develop their own software. They lease their software from a company who develops, maintains and customizes the software for the casino. Most casino software is fair. The large majority of casino software use a random number generator that evenly distributes the outcomes in a totally unpredictable manner as they should. But some casino software produces outcomes that benefit the casino, giving it a much larger house edge than a random number generator would produce. As in all other industries there are also black sheep among casino software suppliers. As a help I have therefore made a run-through of the most trustworthy software brands below.

Boss Media is one of the oldest casino software brands. Over the last years the Swedish-based company has lost its status as one of the major software developers in the industry. Boss Media is still an important actor in the online casino industry though with more than 25 online casinos using its software. Boss Media software is fair and Boss Media casinos have a close to spotless reputation.

Chartwell  was established in 1998 and operates out of Canada. Chartwell has grown a lot the last couple of years and today more than 30 online casinos use Chartwell software. The Chartwell game portfolio is rather small compared to others. It seems to fit many of the sports bookmakers who recently have expanded their business to include an online casino. The majority of casinos that use Chartwell software are "sportsbooks casinos".

Playtech is a company from Cyprus that designs and develops games for the online gaming industry. Playtech was founded in 1999 and more than 100 online casinos use software developed by Playtech. The software is fair, but unfortunately some casino operators using Playtech software have cheating players and/or behaved unfairly over the years. Playtech has done little towards these operators and as a result, Playtech-powered casinos have a mixed reputation in the online gambling industry. There is nothing wrong with the software itself, which produces random outcomes. But the casino operators who use Playtech differ a lot when it comes to fairness towards players.