After comparing RafflePress to KingSumo, it's easy to see that there's a clear winner.  Our top pick for the best giveaway builder is RafflePress. It's super-easy to use with the drag-and-drop builder and offers tons of powerful features to make creating viral giveaways a breeze. The goal-oriented setup options make growing your email list, social followers, and website traffic effortless. And because it's a WordPress giveaway plugin, adding your contest to WordPress takes just a few clicks.