Rao's Homemade All Natural pizza sauce has no added sugar and has just 2 grams of carbs in ¼ cup.  Prego makes a no sugar added traditional pizza sauce and each half-cup serving has 9 grams of carbohydrates and 3 grams of dietary fiber. Primal Kitchen makes an unsweetened pizza sauce and each ¼ cup serving has 6 grams of carbs and 2 grams of fiber.