We do not have an official relationship with any of the ticket vendors listed on our Walt Disney World Cheapest Ticket Calculator. We simply check their web sites for pricing on a regular basis and provide a tool for searching through those prices to find the best deal for your group.
Even if you've never heard of them, to the best of our knowledge all these vendors sell legitimate tickets. Although we've occasionally received complaints, we expect these vendors to work with you in good faith should any problems arise. If you have any questions before purchasing, call the ticket vendor directly and ask them.