score:5
The most popular food ordering services in Greece are e-food and wolt.
E-food has a huge list of affiliated restaurants all around the country, and they have a good search engine that allows for searching specific meals, sorting by minimum order amount, delivery time, etc. They also have a rating system for the restaurants, and public comments on them.
Wolt works a bit differently, because the restaurants don't need to be affiliated with them, they go and pickup a takeaway from the restaurant and deliver it with their own fleet of drivers.