The global public cloud industry is heading toward a new symbolic milestone. IDC predicts that worldwide spending on cloud services will exceed one trillion dollars in 2026, with an annual growth rate of over 21%. This growth is driven by application modernization, advancements in AI-powered platforms, and the ongoing need for more secure and scalable digital infrastructure. The consultancy also estimates that this market could double in size before 2029, clearly indicating that cloud is no longer seen solely as a destination for technological migrations, but as the operational backbone for the next phase of business transformation.
IDC’s forecast reflects a noticeable shift in corporate priorities. For years, much of cloud growth was tied to migrating traditional workloads and deploying Software as a Service. While this dynamic remains active, it now combines with a new pressure: deploying environments prepared for generative AI, agents, real-time analytics, and more complex cloud-native applications. This is one of the reasons why the market continues to accelerate even in a context where many organizations are already talking about cost optimization and disciplined technology spending.
According to IDC, the primary driver of scale will continue to be SaaS, which will account for more than half of total cloud spending in 2026. However, the fastest-growing category will be PaaS, with an increase of more than 37% year-over-year. This difference in size and growth rate reveals how market patterns are changing: cloud software maintains its volume, but platforms for building, training, and operating new AI applications are the ones fueling the strongest growth.
PaaS Gains Momentum Due to AI Pressure
The rise of PaaS isn’t just a technical trend. Companies are investing more in development platforms, data, and AI because they need environments to deploy more complex applications, deeper automation, and services capable of handling growth in processing-intensive workloads. IDC directly links this shift towards PaaS with the expansion of AI platforms and the adoption of cloud-native environments to support generative AI, real-time analytics, and increasingly heavy data loads.
This shift also aligns with a broader trend IDC has noted in previous studies: cloud is evolving from a flexible consumption model to the infrastructure powering many new AI-based services. The firm has previously highlighted that, by the latter half of this decade, a large portion of new applications will be designed to operate across multi-cloud architectures, and the demand for specialized AI services will continue elevating the strategic importance of cloud platforms.
However, not all sectors are adopting cloud at the same pace. SaaS will remain dominant because it addresses well-established needs in enterprise management, security, and core corporate applications. But IDC’s core message is different: cloud growth is no longer solely driven by horizontal adoption; it is increasingly fueled by new use cases that are data-, model-, and automation-intensive.
Banking, Software, and Retail Lead Spending
By industry, IDC identifies banking, software and information services, and retail as the three sectors expected to spend the most on public cloud in 2026. Collectively, they will account for roughly a quarter of the global market. Behind them, other segments with rising importance include professional and personal services, capital markets, media and entertainment, telecommunications, and healthcare providers.
Sector-specific insights also help clarify the types of cloud being purchased. In banking, spending increasingly relates to core system modernization, risk management, fraud detection, and real-time banking supported by AI. For retail, the pressure comes from dynamic pricing, inventory optimization, and digital commerce. In sectors like aerospace and defense, IDC links the increase in spending to the need for secure cloud platforms for advanced analytics, AI, and mission-critical operations amid a more tense geopolitical landscape.
This doesn’t mean all industries are adopting cloud similarly or with the same urgency. But it clearly shows that growth is no longer driven solely by native digital companies or startups. Adoption is now firmly entering regulated industries and environments where security, compliance, and AI capabilities are becoming decisive factors.
U.S. Dominates, but Europe Keeps Up
Geographically, IDC notes that the United States will remain the largest global cloud market, with projected spending of $647 billion in 2026. Western Europe will take second place with $255 billion, while Asia/Pacific excluding Japan and China will reach $84 billion. The firm also highlights that several regions are expected to maintain compound annual growth rates above 20% over five years, including the Middle East and Africa, Latin America, Asia-Pacific, Central and Eastern Europe, and Western Europe itself.
The European figure is particularly notable because it shows the continent accelerating despite debates over digital sovereignty, regulation, and data protection. IDC attributes part of Western Europe’s momentum to cloud modernization programs, adoption of technological sovereignty models, and investments linked to data security and AI governance. In other words, Europe is growing partly because of regulation—not despite it—especially in environments where cloud is seen as the most viable way to meet new security and scalability requirements.
Cloud Is No Longer a Discretionary Expense
IDC’s forecast clearly points to a conclusion: public cloud is no longer a discretionary or purely tactical spending line. It now functions as a core infrastructure for application modernization, AI deployment, and operational resilience. This shift is important because it changes how companies justify their investments. It’s no longer just about migrating for savings or elasticity; it’s about enabling new product models, automation workflows, and analytical capabilities.
This does not come without risks. IDC mentions regulatory fragmentation, talent shortages, and pressure to optimize cloud costs as factors that could slow or challenge growth. However, the overall tone of the report is unequivocal: demand remains strong enough to push the market beyond one trillion dollars in 2026 and sustain double-digit growth through the late 2020s.
In short, the key question is no longer whether cloud will keep growing, but how much of that growth will go to traditional SaaS and how much will shift to platforms designed for AI, agents, and new enterprise applications. Based on IDC’s figures, the answer seems increasingly tilted toward the latter.
Frequently Asked Questions
How much will global cloud spending grow in 2026?
IDC predicts that global spending on cloud services will surpass one trillion dollars in 2026, with an annual growth rate of over 21%.
Which cloud model will grow fastest in 2026?
According to IDC, PaaS will be the fastest-growing public cloud deployment model in 2026, with an increase of more than 37% year-over-year.
Which sectors will spend the most on public cloud in 2026?
The leading sectors are banking, software and information services, and retail, collectively accounting for around 25% of the global market.
Which regions will lead the cloud market in 2026?
IDC projects the United States will remain the top market with $647 billion, followed by Western Europe with $255 billion, and Asia/Pacific excluding Japan and China with $84 billion.
via: idc