How does Truecaller get its data?

We collect names through our partnerships with various phone directory providers globally, social networks as well as when the Truecaller community suggests names through our website and apps. Additionally all users registering to our app will be listed. 

All this data is collected and run through various algorithms to then pick an accurate name.

Truecaller does not upload phonebooks to make them searchable or public from Google Play or Apple App Store downloads. We follow Google Play & Apple App Store guidelines strictly, which prohibits any app from doing so.