Over-the-counter orthotics are generally cheaper to purchase than custom orthotics. Custom orthotics are more expensive because you need to see a specialist and they design a pair of orthotics that are specially made for your feet. They are more comfortable to wear than over-the-counter orthotics and provide better support for the feet. Custom orthotics are also made with materials that best suit your feet, while you can’t choose the materials of over-the-counter orthotics.