It depends what delivery service the restaurant contracts. It can be in-house, a 3rd party like Relay, or a delivery app like Doordash. But even if Doordash delivers, the restaurant still keeps more commission from the order itself if you order directly.

I didn’t know the restaurant could dispatch doordash on their own! That’s interesting.

Personally I use postmates, and with all the fees they stick on it, I’ve assumed it didn’t cost the restaurant anything. Does anyone know if this is true?