Question 1

Which is better, adresse.data.gouv.fr or Maps?

Accepted Answer

If you need a Geocoding API that's easy to integrate, go with adresse.data.gouv.fr. adresse.data.gouv.fr uses no authentication while Maps uses apiKey.

Question 2

What is the main difference between adresse.data.gouv.fr and Maps?

Accepted Answer

adresse.data.gouv.fr: Address database of France, geocoding and reverse. Maps: The Maps API web services suite offers the following APIs:
  - Raster
  The Maps Raster API renders map data that is divided into gridded sections called tiles. Tiles are square images (png or jpg .... They differ in authentication (no authentication vs apiKey), HTTPS support (yes vs yes), and CORS (unknown vs unknown).

Question 3

Which Geocoding API is easier to integrate?

Accepted Answer

adresse.data.gouv.fr is easier to integrate because it requires no authentication.

Feature	adresse.data.gouv.fr	Maps
Authentication	None	apiKey
HTTPS	Yes	Yes
CORS	Unknown	Unknown

adresse.data.gouv.fr vs Maps

adresse.data.gouv.fr

Maps

When to use which?