Traditional store bought pizza sauces have added sugar, and can have upwards of 20 grams of carbs per serving. Luckily, there are some excellent low carb pizza sauce options available now. You should look for a store bought sauce that has less than 8 grams net carbs per serving for a keto-friendly option. Try Rao's homemade pizza sauce. With no added sugars it only has 3 grams of carbs per 1/4 cup.