Truecaller faces mounting pressure as growth slows in India, its largest market, while telcos, Apple, and Google roll out caller ID and spam-blocking features (Jagmeet Singh/TechCrunch)

Jagmeet Singh / TechCrunch: Truecaller faces mounting pressure as growth slows in India, its largest market, while telcos, Apple, and Google roll out caller ID and spam-blocking features — Truecaller is one of the world's most widely used caller identification platforms, with more than 500 million users.