It is 2014. Four friends are at brunch in Brooklyn. The bill comes. The waiter asks if they want it split, and the cash-credit-card-debit-IOU dance that defined American dining-out for decades begins. One person fronts the whole thing on their card. The others promise to pay them back. Some do. Some forget. The friend who paid eventually stops asking because asking is awkward and the amounts are small.
By 2018, that scene has changed. The person who paid the bill pulls out their phone, opens Venmo, and one by one the others tap to send their share. The whole settlement takes ninety seconds. By 2024, an entire generation of Americans under thirty-five — born after 1989 — cannot remember what splitting a bill used to involve. The peer-to-peer wallet has become so embedded in American social life that its absence would feel like the absence of running water.
This is the story of how peer-to-peer payments became standard American infrastructure in fifteen years, why the same infrastructure stops working the moment a transaction crosses the US border, and why the next phase of P2P is being built on a different architecture entirely.
How Venmo, Cash App, and Zelle built American peer-to-peer
The American P2P wallet story has three protagonists, and they arrived in three waves.
Venmo (2009). Founded by two University of Pennsylvania students, Andrew Kortina and Iqram Magdon-Ismail. Acquired by Braintree in 2012 for around $26 million. Acquired by PayPal in 2013 when PayPal bought Braintree. The breakthrough was less the underlying transfer technology — Venmo runs on standard ACH rails — and more the social feed: Venmo transactions defaulted to public, friends could see each other settling up, the app became a low-grade social network around the everyday flow of money. By 2024, Venmo has approximately 90 million annual active users in the United States and processes over $250 billion in payment volume a year (PayPal annual reports, 2024-2025).
Cash App (2013, originally Square Cash). Built by Block (then Square), Cash App took a different cultural angle than Venmo. Where Venmo was social and concentrated in young urban professional users in cities like New York, San Francisco, Boston, and Washington D.C., Cash App grew faster in the South — Atlanta, Memphis, New Orleans — and across less-banked demographics. The app added Bitcoin trading in 2018, stock trading shortly after, and a debit card layer that turned Cash App into a near-bank substitute for users who did not have or did not use traditional bank accounts. Cash App reaches approximately 57 million monthly active users (Block Q4 2024 report) and has become the dominant P2P app for a meaningful share of American users who were excluded or underserved by traditional banking.
Zelle (2017). Built and operated by a consortium of major US banks under Early Warning Services. Unlike Venmo and Cash App, Zelle is integrated directly into bank apps — a Bank of America customer sees Zelle inside the BofA app, a Wells Fargo customer inside the Wells Fargo app. The interface is less social than Venmo, less feature-rich than Cash App, but the integration into the banking experience users already use produced massive adoption. By 2024, Zelle processes more transaction volume than Venmo and Cash App combined — approximately 151 million users moving over $1 trillion across the network in 2024 (Early Warning Services / Zelle network reporting, 2024-2025).
Apple Cash (2014, expanded 2017). Integrated into iMessage and Apple Wallet. Sending happens inside conversations: the dollar-sign button in iMessage opens an Apple Cash send. Friction approaches zero for iPhone users with Apple Cash set up. Less broadly adopted than the big three but deeply embedded in the iMessage social fabric of younger US users.
FedNow (July 2023). The Federal Reserve's real-time settlement network — not a consumer app but the underlying infrastructure that makes 24/7 instant bank-to-bank settlement possible in the US. Adoption among smaller banks and credit unions has been gradual; major institutions are increasingly connected. FedNow does not displace the consumer apps but provides the back-end rail that they can settle on more cleanly than legacy ACH.
Together, these systems mean that any two Americans with smartphones have multiple instant ways to send money to each other. The fragmentation between apps is a coordination problem, not a capability gap. Within the US, the peer-to-peer wallet has won.
Combined annual active users across Venmo (~90M), Cash App (~57M MAU), and Zelle (~151M) substantially exceed the US adult population — meaning many Americans use multiple P2P apps. Zelle alone processed over $1 trillion in transaction volume in 2024. The peer-to-peer wallet is no longer an emerging category in the US; it is default infrastructure.
— PayPal annual reports 2024-2025; Block Q4 2024 report; Early Warning Services / Zelle network reporting, 2024-2025
Why the American rise was specifically American — and why that is the limit
The reason these systems became dominant inside the US is also the reason they do not extend beyond it. Each was built around a stack of distinctly American infrastructure:
US bank accounts as the funding source. Venmo, Cash App, and Zelle all require US-issued bank accounts or US-domiciled financial relationships to operate fully. Adding a non-US bank account to any of these apps is either impossible (Zelle, by design — it only works between US institutions) or limited (Venmo and Cash App accept some non-US payment instruments but with significant constraints).
US phone numbers and identities. The fraud-detection models, KYC processes, and account-verification systems for all three are built around US identity verification (Social Security numbers, US addresses, US-issued ID). Users outside the US either cannot create accounts or cannot reach feature parity with US users.
ACH and US payment rails. Underneath the consumer apps, transactions settle on ACH (or RTP / FedNow more recently). These are domestic payment networks. Cross-border settlement requires entirely different infrastructure (correspondent banking, SWIFT, currency conversion) that none of the consumer apps integrates natively.
The structural pattern: the apps look like consumer products, but underneath, they are skins on top of US-specific banking and payment infrastructure. Extending any of them across borders is not a matter of adding a "send international" button. It is a matter of rebuilding most of what makes them work.
None of the three has, in fifteen years of growth, meaningfully done so.
The four cracks in the US P2P story
For users who never need to send a payment outside the US, the within-country P2P story is essentially complete. For the millions of Americans who do, four cracks define the limits:
Crack one: cross-border sending does not work. Approximately 50 million people in the US are foreign-born, and a substantial share of them maintain financial connections to their home countries. The largest US remittance corridors are massive: approximately $63 billion flows from the US to Mexico annually (Banco de México, 2025); approximately $15 billion to the Philippines (Bangko Sentral ng Pilipinas); approximately $21 billion to Nigeria (World Bank, 2025); $8.2 billion to El Salvador (Banco Central de Reserva de El Salvador). None of this volume runs on Venmo, Cash App, or Zelle. It falls back to Wise, Remitly, Western Union, MoneyGram, traditional wires, or PayPal — each with its own fee structure, timing, and friction.
Crack two: cross-border receiving does not work either. The asymmetry runs in both directions. American creators with international audiences cannot receive support through Venmo or Zelle from those audiences. American small businesses with international customers cannot accept payments through the same domestic P2P apps they use for US customers. American freelancers and contractors with international clients have to set up Wise, Payoneer, or US-side workarounds for receiving. The "global creator economy" that US-based creators participate in is paid for through completely different infrastructure than their domestic income.
Crack three: the fragmentation tax. Even within the US, the multi-app ecosystem creates coordination overhead. Different friends prefer different apps; different vendors accept some and not others; the user has to maintain accounts in two or three of them and remember which connection uses which. The fragmentation is bearable inside a single country but compounds when extended internationally because no single app's coverage extends.
Crack four: the system favours banked Americans. Approximately 7 million American households remain unbanked according to FDIC data; another 14+ million are underbanked. Cash App has done meaningful work serving this segment but full feature parity with banked Americans is not always achievable. Globally, the banking gap is far worse: 1.3 billion adults without bank accounts (World Bank Findex Database, 2022). The US-built P2P apps were not designed for unbanked global users; the apps that were (M-Pesa, mobile money networks across Africa and Southeast Asia) do not interoperate with the US apps. The world's largest unbanked populations and the world's most-banked P2P ecosystem are not connected.
The next phase — what global P2P actually requires
The peer-to-peer wallet revolution that played out in the US between 2009 and 2024 also played out, in different forms, in dozens of other countries. UPI in India processes more transactions globally than Venmo and Cash App combined and serves over a billion users. Pix in Brazil reached over 150 million users within four years of its 2020 launch. Bizum in Spain, M-Pesa in Kenya, GCash in the Philippines, GoPay in Indonesia, MoMo in Vietnam — each country produced its own dominant P2P ecosystem.
What did not happen, in any of these countries or between them, was a globally interoperable P2P experience. Each system solved within-country settlement at the same level of simplicity. None solved between-country settlement at the same level. The bilateral linkages that exist (UPI-Singapore, UPI-UAE, PayNow-PromptPay, and a handful of others) are progress, but each is a country-pair integration that scales as countries-squared. A genuinely global P2P experience cannot be built by stacking enough bilateral integrations to cover every pair of countries — the math does not work.
What it requires instead:
- A single global network rather than domestic networks bridged by intermediaries.
- Tokenised value that travels across the network rather than country-bound bank deposits that need translation at every border.
- Direct wallet-to-wallet settlement on a shared ledger, without correspondent banks in the path.
- Globally inclusive coverage from launch — not a Stripe-style supported-country list with most of the world excluded by default.
- Mobile-first architecture that does not assume the user has a bank account, a US identity, or any specific national infrastructure.
This is not hypothetical. It is the architecture being built — by the Spondula network specifically, and by a small set of other globally-scoped P2P initiatives operating from different starting points (Bitcoin Lightning, certain stablecoin networks). The next phase of peer-to-peer payments is not "Venmo, but international." It is a structurally different architecture that solves the cross-border problem at the network level rather than as an afterthought bolted onto a domestic system.
Within-country P2P works in over 70 countries with real-time payment systems. Cross-border P2P at the same level of simplicity exists for almost no country pair. The G20 target of 75% of cross-border retail payments credited within one hour by 2027 currently stands at 35% (BIS, 2024 cross-border payments monitoring survey, 2025). The gap is the single largest unsolved problem in modern payments.
— BIS, 2024 cross-border payments monitoring survey, 2025; Global Findex Database, World Bank, 2022
What happens when the US user has a global handle alongside their domestic apps
The practical scenario for an American user in the next phase is not abandoning Venmo, Cash App, and Zelle. Those continue to work for what they always worked for — splitting bills with friends in the next neighbourhood, paying babysitters, settling the dinner-table dance. The US-domestic P2P story is not going away.
What is added is a global handle that handles the cases the domestic apps never could. The American sending money to family in Mexico — uses the handle. The freelancer in Atlanta receiving payment from a client in Berlin — uses the handle. The creator in Los Angeles taking direct support from fans in Manila, Lagos, Mumbai, and Buenos Aires — uses the handle. The small business in Chicago invoicing an international customer — uses the handle. The traveller settling a holiday-house bill with friends from three different countries — uses the handle.
The split that emerges in the user's daily life is clean: domestic apps for within-country, the handle for everything that crosses a border. Both are simple. Both are instant. Both work the same way structurally. The friction that has defined the cross-border experience for the last fifteen years — wires, FX margins, "1-3 business days," country exclusion lists — disappears at the moment the handle is in the wallet.
The first phase of peer-to-peer payments — Venmo, Cash App, Zelle, and their international counterparts — built the within-country experience that hundreds of millions of users now treat as default. The second phase is closing the gap between domestic and international, and it is being built on a different architecture because the domestic architecture was never designed to extend. The next phase is global by default — and that is what Spondula is being built to deliver.
Spondula is pre-launch. If you are an American user who has wondered why Venmo never extended internationally, why Zelle stops at the US border, or why every cross-border payment app feels less elegant than the domestic experience you already have — the answer is that domestic and global require different architectures, and the global one is what is being built now. The waitlist is where the next phase activates for early users.
Frequently asked questions
What's the largest peer-to-peer wallet in the US?
By annual transaction volume, Zelle is the largest — processing over $1 trillion in 2024 across approximately 151 million users (Early Warning Services / Zelle network reporting). By distinct user base in the consumer-app sense, Venmo (approximately 90 million users) and Cash App (approximately 57 million monthly active users) are the largest standalone apps. Many Americans use multiple of these systems for different contexts.
Why doesn't Venmo work internationally?
Venmo is built on US-specific banking and payment infrastructure: US bank accounts as funding sources, US identity verification for accounts, ACH/RTP/FedNow as the settlement rail. Extending Venmo internationally would require rebuilding the underlying infrastructure for cross-border use — a fundamentally different architectural project than adding features to the existing app. PayPal (Venmo's parent company) handles cross-border through PayPal-branded products with different fee structures and friction.
What's the future of peer-to-peer payments in the US?
Within the US, FedNow continues to roll out as the underlying real-time settlement rail; consumer apps will increasingly settle on it for faster, cleaner bank-to-bank flows. The consumer-facing experience is unlikely to change dramatically because it is already very good. The bigger shift is the addition of a cross-border layer — provided by globally-architected networks like Spondula — that gives US users a complete P2P experience for both domestic and international transfers.
How is Spondula different from Venmo, Cash App, or Zelle?
Venmo, Cash App, and Zelle are domestic US peer-to-peer apps built on US payment infrastructure. They work brilliantly within the US and do not work across borders. Spondula is a globally-scoped peer-to-peer network built from the start to handle cross-border transactions at the same level of simplicity domestic apps provide for within-country use. The two are complementary, not competing — Americans typically run their existing domestic apps for US-to-US transfers and the Shandle for everything that crosses a border.
Can I use Venmo for international transfers at all?
No. Venmo is US-only — it does not support sending to or receiving from accounts outside the US. PayPal (Venmo's parent company) does support cross-border transfers, but with different fee structures (typically 4-5% on cross-border transactions plus FX margins) and through PayPal-branded interfaces rather than Venmo. For Americans wanting to send abroad, the practical options are PayPal, Wise, Remitly, traditional bank wires, or — for the next phase of P2P — a globally-scoped wallet with an Shandle.
Will FedNow eventually support cross-border payments?
FedNow is the Federal Reserve's domestic real-time settlement system. The Federal Reserve has expressed interest in international interoperability over time, but FedNow as currently architected is US-domestic. Cross-border real-time settlement requires linkages to other countries' real-time systems — which exist for some country pairs (UPI-Singapore, etc.) but not for the US. A genuinely global P2P experience cannot be built by stacking bilateral linkages alone; it requires a single globally-scoped network from the architectural starting point.
Spondula is a global payments network. It is not a bank, exchange, investment platform, or broker. Availability, pricing, and Operator coverage vary by country. Bitcoin rewards depend on real network activity and are not guaranteed. See our terms and conditions for full details.
