Platforms such as apollo.io provide similar services. They also include data of residents and citizens of EU countries, which is subject to the GDPR, but since

Platforms such as apollo.io provide similar services. They also include data of residents and citizens of EU countries, which is subject to the GDPR, but since apollo.io is not based in the EU, no legal action can be taken. Such services are creepy, but let's not pretend they don't exist in the West. And since it was built with public data and web scraping of social networks, it must be assumed that any significant secret service has similar databases.