Truecaller

Truecaller makes an app founded in 2009 in Stockholm by Nami Zarringhalam and Alan Mamedi, for identifying unknown numbers, blocking spam calls and messages, scam detection, call screening, call recording, an AI call scanner, a URL checker and reverse phone number lookup, available for Android, iPhone and Wear OS. The company also runs a business arm for advertisers, businesses and developers, and publishes brand assets and a company fact sheet for media use.

Advertising on the app runs as Brand Ads. Its ads.txt lists 1 ad system line, 1 direct and 0 reseller.