What is the difference between quiche and frittata?

The main difference between quiche and frittata is the crust. Quiche has a pastry crust, while frittata is crustless. Additionally, quiche is typically baked in the oven, while frittata is cooked on the stovetop and finished under the broiler. Both dishes are egg-based and can be filled with various ingredients like vegetables, cheese, and meats.