what3words is a geocoding service that divides the world into squares of roughly three metres and assigns each square a unique combination of three words. Users can share a location this way instead of coordinates or a street address. The service is offered through websites, iOS and Android apps, and an API that converts between three-word addresses and latitude and longitude.
what3words Limited has its registered address in London, so the United Kingdom is its home jurisdiction outside the EU. The privacy policy names hosting providers including Amazon Web Services and Google Cloud, and an earlier German version states that the systems are hosted in London on Amazon infrastructure. Personal data may be transferred to countries outside the EEA under safeguards such as standard contractual clauses. No majority owner is named. For a European organisation, the main point is that the service is run by a non-EU company and hosted outside the EU.