Preheat oven to 350 degrees F (175 degrees C). Lightly grease a small baking dish.
Mix together Neufchatel cheese, mayonnaise, Parmesan cheese, Romano cheese, garlic, basil, salt, and pepper in a bowl. Gently stir in artichoke hearts and spinach.
Transfer mixture to prepared baking dish. Top with mozzarella cheese. Bake in preheated oven until bubbly and lightly browned, about 25 minutes.