Ride free open public infrastructure to near zero-cost distribution, saturate the harder side of the network first, then convert the resulting habit into a platform users cannot easily leave.
PhonePe
PhonePe is India's largest UPI payments app, handling roughly 47 to 48% of the country's Unified Payments Interface volume and over 8.5 billion transactions in a single month. Its stories share one through-line: it rode India's free, open public payment rails to near zero-cost distribution, planted itself in tens of millions of small merchants, and then converted that transaction habit into a full financial-services platform that is hard to leave.
Network Effect: turning free UPI rails into a two-sided merchant-and-consumer flywheel
The problem. When PhonePe's UPI app went live in August 2016, digital payments in India were a chicken-and-egg standoff: consumers had no reason to install a payments app if kirana stores and roadside vendors did not accept it, and merchants had no reason to accept it if no customers paid that way. Cash was the default, and card terminals were expensive and rare.
The approach. PhonePe built a two-sided network on top of UPI's interoperable rails by flooding the merchant side with free acceptance. It distributed more than 30 million PhonePe QR codes to kirana stores, restaurants, and street vendors, often for free, and was the first player to launch an interoperable QR code, so a single sticker could accept payment from any UPI app.
How it solved it. Every new accepting merchant made the app more useful to consumers, and every new consumer made acceptance more valuable to merchants, compounding into scale. PhonePe reached more than 500 million registered users and over 37 million merchants, covering roughly 99% of India's pin codes, and by June 2025 was processing over 8.54 billion transactions in a month, close to half of all UPI activity nationwide.
Platform & Ecosystem: layering financial services onto the payment habit
The problem. UPI payments themselves earn almost nothing for the app: the government mandated zero merchant discount rate on UPI, so a company doing billions of transactions had no direct revenue from the core act. PhonePe needed to monetize a massive, high-frequency user base that came for a free utility.
The approach. PhonePe turned the payments app into a platform for financial services, using the daily transaction habit as the distribution channel. It began in 2017 by letting users buy 24-karat gold, then added mutual funds, insurance, and lending, and acquired wealth-management startups Wealthdesk and OpenQ in 2022 to accelerate the investment stack. For merchants, it layered on lending and advertising solutions.
How it solved it. The result is a super-app flywheel: hundreds of millions of users who open PhonePe to pay a vendor are cross-sold tax-saving funds, travel and life insurance, and credit, so the free payment habit funds paid products stacked on top. This breadth is exactly what PhonePe carried into its 2025 SEBI IPO filing as the case for a multi-line financial-services business rather than a payments utility.
GTM: catching demonetization, then buying attention and covering the ground
The problem. In 2016 PhonePe was a late entrant against incumbents like Paytm and a well-funded field, and it had to acquire both consumers and merchants across a vast, mostly offline country where most commerce ran on cash.
The approach. PhonePe stacked three go-to-market moves. First, timing: it launched in August 2016, just before the November 2016 demonetization that voided high-value notes and pushed millions to try digital payments. Second, mass attention through generous early cashback and heavy IPL and ICC World Cup sponsorship, with roughly 20 to 25% of marketing spend on TV and out-of-home to reach smaller cities. Third, brute-force offline distribution: a direct sales force plus distributors working tens of millions of merchant touchpoints, backed by its low-cost audio confirmation device.
How it solved it. The combination took PhonePe from 1 million daily transactions in 2017 to over 40 million offline merchants and market leadership, with roughly 47% UPI share by 2025 and 2026. To lock in mom-and-pop stores it priced its SmartSpeaker at zero setup and just ₹1 per month, a move so aggressive it forced Paytm to drop its own subscription fees.
Switching Costs: welding merchants to the network with hardware, settlement, and credit
The problem. Because UPI is interoperable and QR codes are shared, a merchant can accept any app for free, so acceptance alone creates no lock-in. Rivals could in principle win the same shopkeeper with the same open rails at any time.
The approach. PhonePe deepened its hold on merchants beyond the free QR by embedding itself in their daily operating routine. It deployed the SmartSpeaker (Soundbox), which announces each payment aloud so a busy vendor trusts the sale without checking a phone, and wrapped merchants in settlement, lending, and advertising services that live inside PhonePe's ecosystem.
How it solved it. More than 15 million PhonePe SmartSpeakers were deployed by 2025, each one a piece of PhonePe-branded hardware and a cash-flow ritual a merchant would have to unlearn to switch away. Combined with merchant credit and settlement, this converted a free, interoperable acceptance point into a sticky operating relationship, the merchant network that anchors PhonePe's moat and that Walmart backed through its 2022 full separation from Flipkart and India redomicile (on which PhonePe paid roughly ₹8,000 crore, about $1 billion, in taxes).
Differentiation: Amitabh Bachchan's voice turns a commodity soundbox into a ritual
The problem. By 2023 the merchant soundbox had become a commodity. PhonePe, Paytm, Google Pay, and BharatPe all shipped near-identical devices that beep out a payment confirmation, and the hardware alone gave a shopkeeper no reason to prefer one network over another. The very feature that had built trust, an audible confirmation so a busy vendor need not check a phone, was now table stakes any rival could match.
The approach. PhonePe differentiated the one thing competitors could not clone: the voice itself. On 4 September 2023 it launched a first-of-its-kind celebrity voice feature, letting its SmartSpeakers announce payment confirmations in Amitabh Bachchan's instantly recognizable voice, available in Hindi and English with more languages planned, and switched on by the merchant through the PhonePe for Business app. As offline-business head Vivek Lohcheb put it, "Mr. Bachchan's voice has an instant and universal recall, and it resonates with millions of Indians across the country."
How it solved it. The move turned a functional beep into a branded daily ritual across an already vast footprint: roughly 4 million SmartSpeakers spanning 19,000 pin codes and over 90% of the country, validating around 100 crore (one billion) transactions. Every confirmation in a beloved superstar's voice made the PhonePe device the one a merchant chose to keep switched on and the one customers noticed at the counter, converting undifferentiated hardware into a moment of delight and status that a plain rival beep could not answer.