VYPER is one of the best giveaway software on the market. With it, you can create a stunning giveaway or viral contest and grow your email list and social media followers. You can make your giveaways mobile-optimized so that they look great on all devices. They make it easy for people to enter by allowing them to share on social media or enter their email address—and those who share win additional prizes! VYPER also gives you analytics so you can track how many people are entering and where they're coming from.