They're comparable in that they send glasses online, but Warby's differentiator is that they manufacture frames (so they handle the whole process end to end) an

They're comparable in that they send glasses online, but Warby's differentiator is that they manufacture frames (so they handle the whole process end to end) and offer a home try on kit. You can order X amount of glasses to try on at home. They basically started a very customer friendly model that other online glasses retailers didn't offer at the time of founding. EDIT: Basically, customer experience.