Kenya. And it’s not close.

In 2025, M-Pesa — Safaricom’s mobile money platform — processed KES 83.7 trillion in transactions. That’s roughly $649.7 billion, about four times Kenya’s entire GDP. Think about that: a single mobile money system moving four times the value of the country’s annual economic output. No bank on the continent touches that volume.

The scale of the network is what makes it work. As of August 2026, M-Pesa had 95.31 million registered accounts, and the agent network stood at 507,383 outlets as of February 2026 — the human ATMs that made mobile money real for people without bank branches. That agent footprint is the moat. You can’t replicate half a million trusted cash-in/cash-out points with an app update.

Here’s what’s shifting, though: agent cash volumes softened through 2025, not because mobile money is slowing, but because it’s maturing. Payments are moving from cash-in/cash-out at agents to direct digital transfers — person to person, business to customer, straight through the phone. The IMF now uses mobile money transaction data as a real-time proxy for GDP in markets like Kenya. When economists start reading your payment rails instead of your national accounts, you’ve become infrastructure.

The honest tension: Kenya built this lead over nearly two decades, starting from 2007. Nigeria has the population, Ghana has the growth rate, but neither has the agent density or the regulatory runway Kenya enjoyed. The question for investors isn’t who copies M-Pesa — it’s who builds the financial products on top of rails like these. Lending, insurance, merchant credit: the second layer is where the returns live.

This is the kind of structural intel the Sleeping Giants Club tracks — not headlines, but the rails underneath them. The Vault maps the fintech players building on mobile money infrastructure across the continent, the monthly briefings follow where the capital goes next, and the 100-startup database keeps every name in one filterable place. Real numbers, real companies, updated monthly.