Differences between the Google Maps and OpenStreetMap APIs

Google Maps API

• Global reach with data from almost everywhere.
• Consistent formatting for street addresses.
• Consistent and predictable administrative areas; cities are (almost) always cities (and not regions, for example).
• Map translations are available, meaning you can set the language of the map.
• Custom Styling with the Custom Maps addon.
• Users cannot fix errors, but incorrect data can be reported to Google.
• Can be costly once free quota has been exceeded.

Open Street Maps API

• Free.
• Several map styles (tilesets) available with different styles through the Custom Maps Addon.
• Data errors can be correct by directly editing the map on the OSM site.
• Global community, but a much lower overall volume of data.
• Inconsistencies in address formatting, especially between countries.