Most of the time, chilli sauces are vegan. They only contain chilli paste, vinegar, water, citric acid, garlic, sugar, salt, and other flavouring substances. Also, the chances are that, if you are buying a regular chilli sauce from your local supermarket, you will be getting a vegan sauce almost all the time. However, there are chilli sauces that contain non-vegan ingredients as well. Non-vegan ingredients that are used in hot sauces include cream, shrimp, and fish. These ingredients add a unique flavour to the sauce. So, unless these ingredients are not present in a chilli sauce, you can be sure that it is a vegan sauce.