What hot sauce is commonly used as a condiment for pho?

What hot sauce is commonly used as a condiment for pho? Sriracha is a commonly used hot sauce condiment for pho, particularly in Vietnamese restaurants outside Vietnam.

The thick red sauce is made from chili peppers, vinegar, garlic, sugar, and salt. Diners often squeeze it directly into the broth or mix it with hoisin sauce for dipping beef, meatballs, or other ingredients.

Sriracha became especially associated with pho in North America, where restaurants frequently place squeeze bottles on the table. Its sweet-and-sour flavor and moderate heat complement the aromatic broth without requiring fresh chili preparation.

The association is not universal. In Vietnam, restaurants and households may more often use fresh chilies or a local chili sauce known as tương ớt. Sriracha itself is named after Si Racha, a coastal city in Thailand, although the familiar restaurant condiment developed through several Thai and Vietnamese food traditions.