Online casinos have become so popular and their variety is so huge that it’s becoming harder and harder to choose the right one between them all. To entice new casino players some casinos would offer great casino bonus promotions from no deposit casino bonuses to exclusive High Rollers bonuses. Some casinos are paying more attention to their games, customer support, methods of payment, language options, free phone numbers, news letters, games strategy lessons, live casino dealers it is even possible to watch free strip shows. But for the players one of the most important thing is to find a right game where they can beat the casino. Of course one the games that gives an advantage over the casino depending of the rules and casino bonus offered is Blackjack.For the Blackjacks casino players the variety of Blackjack games offered is frustrating because the difference of the game rules, stakes limits, casino bonus offered, multi-player options etc.But there may be a way of disclosing the actual differences between the blackjack casino games offered that a casino has available without actually having to download and play at an online casino in accordance with the casino software provided by most popular ones?Some online casinos use their own custom designed software but most famous and reliable online casinos use software supplied by companies specialising to develop casino games software. There are of course the biggest and most trusted ones supplying high quality casino software: Microgaming, Real Time Gaming, and Playtech.The thing to remember is that each of these software providers have drastically different suites of blackjack games, so all you have to do is find out what software provider the casino you are interested in is using and you will know exactly what variations of blackjack they can offer and also the quality of the games themselves. Below is a brief overview of the three main software providers and the different blackjack variations they all offer.Microgaming casinos is perhaps the internet’s largest casino software provider. They offer the largest number of blackjack variations totalling up to an amazing 20 different types of blackjack. This is an amazing number but does not mean that Microgaming is the best. If you haven’t tried other casinos using other software you should do so and judge for yourself which is best for you. Two of the featured variations of blackjack available with Microgaming software is Multihand Atlantic City Blackjack.Like classic blackjack it’s played with a single 52 card deck, but you can play up to 5 hands at a time. Microgaming also offers Multi-hand Bonus Blackjack, uses 2 decks of 52 cards. In this game there is a bonus bet feature that allows you to make a bonus bet at the beginning of each hand, and it pays out on the 1st two cards.Real Time Gaming or, RTG, doesn’t offer as many versions of blackjack as Microgaming but the selection is still good and the execution is top quality as well.Playtech prides itself on the fact that they offer blackjack variations that use anywhere up to 4 to 8 standard decks, and have very good casino bonuses. Playtech casino software contains very realistic game play, whether it’s blackjack or any other casino game. Of the top three software platforms mentioned here, Playtech casinos offer the fewest Blackjack variations but the quality it still top notch. The major Blackjack game Playtech casinos offer is Blackjack Switch, which uses 6 decks of 52 cards, and all of these decks are shuffled between hands. The biggest difference with this game is that all cards are dealt face up and the Player receives 2 hands. Hope this helps you to get a handle on what casinos offer what blackjack variations.