The European Union's antitrust authorities have moved to classify the cloud computing divisions of Amazon and Microsoft as "gatekeepers" under the bloc's Digital Markets Act, marking the first time Brussels has extended its aggressive tech regulation into the cloud infrastructure sector. The preliminary determination by EU regulators follows an extensive seven-month investigation and would subject Amazon Web Services and Microsoft Azure—the world's two largest cloud providers—to a stringent framework of obligations and prohibitions designed to constrain their market influence.
The gatekeeper designation carries significant operational implications for both companies. Under the DMA framework, AWS and Microsoft Azure would face restrictions on self-preferencing practices, whereby they might otherwise prioritise their own services over those of competitors. Additionally, the rules would mandate that both platforms ensure technical interoperability with rival systems and facilitate data portability for customers, reducing switching costs and vendor lock-in effects that have traditionally benefited cloud incumbents. These requirements represent a marked departure from the regulatory approach that has characterised Europe's technology oversight until now, which has primarily targeted consumer-facing platforms such as search engines, social media networks, and mobile app stores.
The expansion into cloud infrastructure signals Brussels' determination to regulate sectors deemed foundational to Europe's economic future and technological independence. Henna Virkkunen, the EU's technology chief, framed the move as essential to maintaining competitive digital markets. She emphasized that cloud services have become integral to European business operations, with more than half of all EU enterprises now dependent on commercial cloud platforms. This reliance has accelerated alongside record-breaking investment in public cloud infrastructure across the continent, intensifying concerns among regulators that concentrated market power could stifle innovation and create bottlenecks in emerging technologies such as artificial intelligence.
The EU competition authority identified several factors justifying the gatekeeper classification for both companies. AWS and Microsoft Azure command substantially larger revenues, operational capacity, and research-and-development budgets than competing cloud providers. Both have amassed extensive, deeply entrenched customer bases, and switching between platforms involves prohibitive costs and technical complexity that lock customers into their ecosystems. Crucially, the Commission cited the growing integration of AI capabilities and partnerships into cloud offerings as a determining factor in procurement decisions across European enterprises. As businesses increasingly select cloud providers based on AI functionality and vendor partnerships, the dominance of AWS and Microsoft in these domains reinforces their market position and raises competitive concerns.
Amazon responded swiftly to the preliminary findings, arguing that the assessment overlooks the genuine diversity of cloud services available to European customers. An AWS spokesperson contended that the designation risks discouraging European investment and inhibiting innovation within the region. The company emphasized that the European Union has already implemented comprehensive cloud regulation through the Data Act, and layering additional DMA obligations creates duplicative and excessively burdensome regulatory requirements. AWS framed the additional compliance burden as potentially undermining European competitiveness and limiting access to advanced information technology infrastructure at a moment when the continent seeks to strengthen its technological autonomy.
Microsoft took a different defensive approach, pivoting to competitive concerns about Google. A Microsoft representative stated that the company remains troubled by what it characterises as the insufficient regulatory scrutiny of Google Cloud's expanding capabilities and the growing influence of Google's Gemini AI system. The company's argument implies that designating AWS and Microsoft as gatekeepers while allowing Google Cloud greater latitude could paradoxically distort competition by advantaging a competitor with overlapping interests in search, advertising, and now cloud services.
The preliminary determination opens a period during which both Amazon and Microsoft can formally respond to the Commission's findings and present evidence or arguments challenging the gatekeeper classification. This consultation phase represents a critical juncture, as companies often contest such designations with detailed submissions examining market dynamics, competitive constraints, and the definitional thresholds applied. The EU competition enforcer will review these submissions before issuing a final decision within the coming months, at which point the gatekeeper obligations would become binding if upheld.
For Southeast Asian technology policymakers and businesses, the EU's cloud gatekeeper designation carries important implications. Many Malaysian, Singaporean, Indonesian, and Thai enterprises rely on AWS and Microsoft Azure for critical digital infrastructure, and enhanced interoperability and data portability requirements could eventually benefit regional customers by reducing switching costs and improving competitive options. However, the regulatory complexity introduced by DMA compliance could also elevate operational costs for cloud providers, potentially affecting service pricing and investment in the region. Southeast Asian governments watching this regulatory development may face pressure to establish their own frameworks governing cloud provider conduct, either harmonising with European standards or developing alternative approaches that reflect regional priorities.
The expansion of the DMA into cloud services also highlights the EU's determination to maintain technological sovereignty and control over critical digital infrastructure. By designating AWS and Microsoft as gatekeepers, Brussels asserts that cloud computing—no longer merely a commercial service category but rather foundational to artificial intelligence development, data management, and digital competitiveness—requires the same regulatory discipline applied to other essential platform services. This philosophy reflects a broader European view that permitting uncontested dominance by two American firms over cloud infrastructure poses strategic risks to the continent's long-term technological autonomy and economic independence.
The outcome of this proceeding will reverberate across the global technology sector. If the EU succeeds in imposing binding gatekeeper obligations on AWS and Microsoft, other major democracies and trading blocs—including the United Kingdom, Singapore, Australia, and potentially others—may pursue similar regulatory frameworks tailored to their domestic contexts. Conversely, if AWS and Microsoft successfully challenge the preliminary findings, the episode will demonstrate the limits of EU antitrust authority over cloud infrastructure and may influence how other jurisdictions approach cloud regulation. The months ahead will be closely watched by technology companies, policymakers, and investors worldwide as a test case for whether concentrated market power in critical digital infrastructure can be effectively constrained through competition law.
