Latin America’s Platform Competition Problem: When Market Power Is Access, Data and Interoperability

Latin America does not only need more digital adoption. It also needs a more precise way to understand who controls the digital routes into its markets.

Platform competition is often discussed as if it were a narrow antitrust topic. That is too limited. In digital markets, power is not always visible in prices. It may appear in who controls seller access, buyer data, app distribution, ranking logic, payment infrastructure, logistics, advertising inventory or the technical interfaces that allow competitors to connect.

For Latin America, this matters because many markets are becoming digitally reachable but not necessarily digitally open. A company may see rising e-commerce demand, growing fintech adoption or stronger digital advertising channels, yet still depend on a small number of platforms to reach users, process payments, manage fulfillment or build visibility.

Platform Power Is Access Infrastructure

Classic market analysis asks who has market share, who sets prices and who competes with whom. Digital platform markets require another layer. A platform may connect several sides of a market at once: buyers and sellers, drivers and passengers, merchants and payment users, advertisers and audiences, developers and operating systems.

That changes the competitive logic. The most important question is not always whether a platform charges too much. It may be whether other companies can reach the market without depending on that platform’s private rules, data architecture or ranking systems.

This is why platform competition should be understood as market infrastructure. A marketplace is not only a sales channel. A payment platform is not only a transaction tool. A logistics network is not only a delivery layer.

Once these systems become central to how businesses reach demand, they become part of the market’s access architecture.

Why Price Is a Weak Signal in Digital Markets

Many digital services look cheap or even free to the end user. That does not mean power is absent. In two-sided or multi-sided markets, one side may pay little while the other side carries the dependency.

Sellers may need the platform to reach demand. Drivers may need the platform to receive orders. Advertisers may need the platform to reach users. Developers may need the platform to access an operating system or app store.

Competitive harm can therefore appear as restricted access, self-preferencing, limited data portability, weaker interoperability, opaque ranking, exclusionary platform rules or rising switching costs. A business can be locked into a platform even when the consumer-facing price remains low.

For Latin America, this distinction is especially relevant. Digital markets are still expanding, but many companies are entering them through platform intermediaries rather than through direct, independent demand channels.

The strategic issue is not only whether demand exists. It is whether the route to that demand is open, contestable and economically sustainable.

The EU Digital Markets Act as a Reference Point

The European Union’s Digital Markets Act offers one of the clearest examples of how regulators are moving beyond classic price-based competition analysis. The DMA identifies large digital platforms as gatekeepers and imposes obligations designed to make digital markets fairer and more contestable.

For Latin America, the DMA is not a ready-made template. Market size, institutional capacity, enforcement resources and platform dependency differ across the region.

But the DMA is useful as a conceptual reference because it focuses on the structural role of gatekeepers: access, interoperability, data portability, app distribution, default settings and the ability of third parties to compete inside platform-controlled environments.

The key lesson is not that Latin America should copy European regulation. The lesson is that digital competition increasingly requires tools that can see where market power sits when it is embedded in technical systems, private rules and ecosystem control.

Brazil and Uruguay as Early Latin American Signals

Brazil is the region’s most important digital-market test case. Its market size, fintech infrastructure, PIX ecosystem, e-commerce scale and regulatory capacity make it a natural reference point for Latin America.

PL 4675/2025 moves the debate in that direction by proposing processes for designating economic agents of systemic relevance in digital markets and creating a Digital Markets Superintendence within CADE.

Uruguay shows a different but equally relevant signal. The taxi and Cabify-related competition case was not about a global platform dominating a large market. It was about access to a local intermediation market and the effects of exclusivity rules in a two-sided platform environment.

That matters because it shows that platform-style competition analysis is no longer only a question for the United States, the European Union or Brazil.

Together, Brazil and Uruguay show why Latin America should not be treated as a passive receiver of global platform rules. The region is beginning to build its own competition cases, legal debates and institutional learning around platform power.

Mercado Libre as a Platform Infrastructure Signal

Mercado Libre is useful here not as a stock-market story, but as a market-structure signal. The company combines marketplace, logistics, payments, credit, advertising and merchant services across Latin America.

That makes it more than an e-commerce website. It is becoming part of the operating infrastructure through which many buyers and sellers interact.

This does not mean that Mercado Libre should automatically be framed negatively. Platforms can create efficiency, reduce informality, improve payment access, expand logistics coverage and open demand for smaller sellers.

In Latin America, where many markets still suffer from fragmented distribution and weak financial inclusion, platform infrastructure can solve real problems.

The strategic question is balance. When platform infrastructure becomes essential, companies need to understand not only the opportunity but also the dependency: who owns the customer relationship, who controls seller data, who sets ranking rules, who captures payment flows and how difficult it is to switch to alternative channels.

For a more market-entry and visibility-focused comparison, see the VolzMarketing analysis on Mercado Libre vs. Temu in Latin America.

Why Platform Dependency Matters for Market Entry

For international companies, platform dependency can change the entire market-entry calculation. A brand entering Brazil, Mexico, Argentina, Chile, Uruguay or Paraguay may not only ask whether customers exist. It must ask how customers are reachable and through which intermediaries.

In some sectors, marketplaces are the main access point. In others, payment systems, delivery apps, app stores, B2B directories, social platforms, search engines or AI answer systems shape visibility.

This means that digital expansion is not just a marketing question. It is a market-access question.

A company that only plans SEO, ads or marketplace listings may miss the deeper issue: the channel itself may be controlled by a gatekeeper, and that gatekeeper may shape visibility, data access, customer ownership, pricing power and long-term bargaining position.

From Market Intelligence to Market and Platform Intelligence

For market analysis, this shifts the question from “Which market is growing?” to “Through which infrastructures is this market reachable?”

The relevant analysis is not legal compliance advice. It is strategic market intelligence: which platforms control access, where dependency appears, how visibility is distributed, whether interoperability matters, what data is available, which platform rules shape competition and whether regulatory change could alter the market structure.

This is especially important for e-commerce, fintech, mobility, food delivery, cloud services, advertising, B2B marketplaces, industrial distribution and cross-border digital sales. In all of these fields, market access is increasingly mediated by platforms.

What a Market and Platform Intelligence Check Should Include

A practical platform-intelligence check should begin with a channel map. Which platforms matter for discovery, transaction, payment, logistics, reputation, advertising and after-sales access? The answer will differ by sector and country.

The second layer is dependency. Can a company reach buyers outside the dominant platform? Can it move data, reviews, payment history or seller reputation elsewhere? Are APIs and integrations open enough to support alternatives? Are switching costs economic, technical or reputational?

The third layer is regulatory exposure. Brazil’s digital market debate, Uruguay’s competition enforcement and the EU’s DMA all point in the same direction: access, data and interoperability are becoming competition-policy concerns.

Companies operating in Latin America should monitor these signals before they become operational risks.

Why This Matters for Latin America’s Digital Economy

Latin America needs strong digital platforms. They can reduce transaction costs, expand access to finance, improve logistics and help small businesses reach demand.

But if platform power becomes unchecked access control, the result can be dependency rather than openness.

The region’s challenge is therefore not anti-platform. It is pro-contestability. The question is how to preserve the efficiency of platforms while preventing market access from becoming locked behind private rules, closed data systems and non-interoperable infrastructures.

For companies, the lesson is clear: digital growth in Latin America is not only about demand, ads or SEO. It is about understanding the platform layer that stands between the company and the market.

Marcus A. Volz

Born in Berlin, he has lived and worked in Argentina since 2006. An economist and market analyst with nearly two decades of on-the-ground experience in the Southern Cone, he focuses on market intelligence, search intelligence, B2B visibility and regional market dynamics across South America. Founder of Econosur.