BharatPe's ex-MD Ashneer Grover on Wednesday tweeted about how WhatsApp Pay has been the biggest failure in India as a tech product. "Everyone has WhatsApp on their phone—sending money on WA using UPI is as easy as sending pic. It should have beaten Paytm, PhonePe, GooglePay," he said. Notably, WhatsApp's India head Abhijit Bose quit the company on Tuesday.