Kaplan and the Princeton Review materials are often pitted against one another. They are two huge test prep companies that have a ton of high-quality content. Princeton Review has self-paced study options for the GMAT, similar to Kaplan’s. When you look into the programs, though, you’ll notice that Kaplan has some more robust elements, like the QBank, GMAT TV, and the Official Test Day Experience. These features make it a little more valuable, which is reflected in the higher price.