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Google Pay is a mobile payment application developed by Google. It allows users to make payments via smartphones using methods such as the Unified Payments Interface (UPI) in India and PayNow in Singapore. The app supports peer-to-peer (P2P) transfers, in-store payments via NFC, online purchases, and bill payments.

PhonePe is an Indian digital payments and financial services company, headquartered in Bengaluru. It was founded in December 2015, by Sameer Nigam, Rahul Chari and Burzin Engineer. The PhonePe app, based on the Unified Payments Interface, went live in August 2016.

Tez was a mobile payments service by Google, targeted at users in India, later folded into the new Google Pay app on 28 August 2018. It operated atop the Unified Payments Interface, developed by the National Payments Corporation of India. The product was created as part of Google's Next Billion Users initiative led by Caesar Sengupta, former vice president and general manager, Payments &

Unified Payments Interface (UPI) is an Indian instant payment system and protocol developed by the National Payments Corporation of India (NPCI) in April 11th 2016. The interface facilitates inter-bank peer-to-peer (P2P) and person-to-merchant (P2M) transactions. It is used on mobile devices to instantly transfer funds between two bank accounts using only a unique UPI ID. It runs as an o