The answer depends on what you mean by “anything”: sweet, sour, spicy, or creamy.
Tomato-based alternatives
Australian/British tomato relish: A thick, chunky tomato relish with onions, perfect for burgers and fries.
Homemade tomato chutney: A thick sauce made with apple cider vinegar, brown sugar, ginger, and garlic.
Marinara or passata concentrate: A quick way to achieve classic ketchup flavor by blending it with a little vinegar, honey, and garlic powder.
Hot sauces
Sriracha: A spicy, garlicky chili sauce that makes an excellent ketchup substitute in fast food dishes.
Gochujang paste (or sauce): A fermented Korean chili paste that adds a sweet, salty, and complex umami flavor to dishes.
Ajvar: A silky, smoky relish made from roasted black-eyed peas and eggplant.
Creamy and tangy dressings
BBQ sauce: Adds a more intense, caramelized flavor with smoky notes, brown sugar, and molasses.
Lemon/vinegar mayonnaise: Provides a creamy texture and the necessary acidity.
Spicy sour cream or yogurt dressing: A refreshing alternative with garlic, red pepper, and a splash of vinegar.