Short answer: AWS had the strongest disclosed cloud economics, Microsoft reported the fastest cloud-related growth, and Google Cloud delivered the most dramatic improvement in profitability. But this is not a perfectly like-for-like comparison: Amazon reports AWS as a standalone segment, Google reports Google Cloud, while Microsoft reports the broader Microsoft Cloud and only gives a growth rate for “Azure and other cloud services.”
All three companies are being compared for the quarter ended December 31, 2024. Microsoft labels that period its fiscal second quarter of 2025.
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The Q4 2024 cloud earnings scorecard
The headline numbers point to three different winners depending on the measure.
| Company | Reported metric | Revenue | Year-over-year growth | Operating income | Margin |
|---|---|---|---|---|---|
| Amazon | AWS segment | $28.8 billion | 19% | $10.6 billion | 36.9% operating margin |
| Microsoft | Microsoft Cloud | $40.9 billion | 21% | Not separately disclosed | 70% gross margin |
| Alphabet | Google Cloud segment | $12.0 billion | 30% | $2.1 billion | 17.5% operating margin |
Important: Microsoft’s $40.9 billion is not Azure revenue. Microsoft Cloud includes Microsoft 365 Commercial cloud, Azure and other cloud services, the commercial portion of LinkedIn, and Dynamics 365. Its narrower disclosed indicator—“Azure and other cloud services”—grew 31%.
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What counts as cloud for each company?
AWS: the cleanest standalone comparison
Amazon reports AWS as a distinct operating segment, so its revenue and operating profit are relatively easy to identify. AWS generated $28.786 billion in Q4 revenue, up 19% year over year. Operating income reached $10.632 billion, producing a 36.9% operating margin.
That margin was approximately 29.6% in Q4 2023, an expansion of roughly 7.3 percentage points. For the full year, AWS reported $107.556 billion of revenue and $39.834 billion of operating income.
Amazon also highlighted AI-related products and infrastructure including Trainium2, Amazon Nova, Amazon Bedrock, Amazon Q, and SageMaker. These are strategic product signals rather than separately reported Q4 revenue lines. Amazon’s earnings release provides the underlying financial and management commentary.
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Microsoft reported $40.9 billion in Microsoft Cloud revenue, up 21%. It separately said revenue from Azure and other cloud services grew 31%. That was the fastest reported cloud-related growth rate among the three companies, narrowly ahead of Google Cloud’s 30%.
However, the 31% figure is not pure Azure growth. Microsoft’s “other cloud services” category includes additional cloud and AI consumption services, GitHub cloud services, Nuance Healthcare cloud services, virtual desktop offerings, and other services. Microsoft also does not disclose Azure revenue or operating income as standalone figures.
Microsoft reported a 70% Microsoft Cloud gross margin, down from 72% a year earlier. Gross margin is not directly comparable with AWS’s or Google Cloud’s operating margin because it excludes operating expenses. Microsoft said AI infrastructure scaling contributed to the margin pressure.
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Microsoft also said its AI business had surpassed a $13 billion annual revenue run rate, up 175% year over year. This is a management-reported run-rate metric, not a separately reported quarterly GAAP revenue line. See the Microsoft Q2 FY25 earnings release and financial metrics.
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Google Cloud: smaller scale, rapid growth and improving profits
Google Cloud revenue rose 30% to $11.955 billion. Operating income increased from $864 million in Q4 2023 to $2.093 billion in Q4 2024.
That lifted Google Cloud’s operating margin from approximately 9.4% to 17.5%. Google therefore produced the strongest year-over-year improvement in operating income and margin percentage terms, even though AWS remained far more profitable in absolute dollars.
Alphabet attributed growth to Google Cloud Platform products, AI infrastructure, and generative AI solutions. The segment includes more than basic compute and storage, so its 30% growth should not be interpreted as infrastructure-only growth.
Who grew fastest?
On the reported figures, the ranking is:
- Microsoft: 31% growth in Azure and other cloud services.
- Google Cloud: 30% growth in the Google Cloud segment.
- AWS: 19% growth in the AWS segment.
The careful conclusion is that Microsoft’s Azure-and-other-cloud-services metric grew fastest. It would be inaccurate to describe the result simply as “Azure grew 31%” without the qualification.
Growth rate alone also does not prove market-share gains. A company can grow quickly while the overall cloud market is expanding rapidly.
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Who generated the most profit?
AWS was the clear leader on disclosed cloud operating profit. Its $10.6 billion of Q4 operating income was about five times Google Cloud’s $2.1 billion. AWS also reported a 36.9% operating margin.
Google Cloud’s 17.5% operating margin was meaningful but lower than AWS’s. Microsoft’s comparable Azure operating profit is unavailable because Microsoft does not report it separately. Its 70% Microsoft Cloud gross margin cannot be ranked against operating margins.
AWS’s profitability also mattered to Amazon’s parent-company results. Amazon generated $21.2 billion in total Q4 operating income, meaning AWS supplied approximately half of the company total.
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Who added the most operating leverage?
Google Cloud was the standout operating-leverage story. Revenue grew 30%, while operating income more than doubled from $864 million to $2.093 billion. Its margin nearly doubled from 9.4% to 17.5%.
AWS also showed strong operating leverage, expanding its margin by roughly 7.3 percentage points. The difference is that AWS started from a much larger and more profitable base.
Microsoft presented the opposite near-term trade-off: strong cloud and AI growth alongside lower Microsoft Cloud gross margin as the company scaled infrastructure.
How AI shaped the quarter
The earnings reports provide several kinds of AI evidence, and they should not be treated as interchangeable:
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- Recognized revenue: revenue recorded in the quarter.
- Revenue run rate: an annualized management measure, such as Microsoft’s more-than-$13 billion AI figure.
- Demand signals: customer consumption, bookings, and management descriptions of demand.
- Infrastructure investment: spending and capacity intended to support future workloads.
Microsoft’s AI revenue run rate indicates commercial momentum, but it is not the same as quarterly Azure revenue. Amazon’s Trainium2, Nova, Bedrock, Q, and SageMaker announcements show product and infrastructure strategy, not separately measured AI revenue. Alphabet linked Google Cloud growth to AI infrastructure and generative AI solutions.
Capital spending: why the biggest number does not automatically win
Alphabet said it expected approximately $75 billion in 2025 capital expenditures. That is a company projection for total capital expenditures—not a claim that all of the spending is AI spending.
Microsoft emphasized continued investment in cloud and AI infrastructure, while its lower Microsoft Cloud gross margin showed one possible near-term cost of that investment. Amazon highlighted AWS AI infrastructure, but its earnings release does not provide a precise AWS-only capital expenditure figure.
Cross-company capex comparisons require caution because the companies use different reporting formats, fiscal calendars, capitalized-cost policies, and infrastructure allocations. Data-center and compute spending may support cloud, advertising, productivity software, search, and other businesses at the same time.
Capital spending can also reflect both strong demand and the need to catch up on capacity. It is therefore not enough to conclude that the company spending the most will earn the best long-term return.
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Parent-company context
| Company | Q4 revenue | Operating income | Net income |
|---|---|---|---|
| Amazon | $187.8 billion | $21.2 billion | $20.0 billion |
| Microsoft | $69.6 billion | $31.7 billion | $24.1 billion |
| Alphabet | $96.5 billion | $31.0 billion | $26.5 billion |
Microsoft’s total revenue rose 12%, operating income rose 17%, and net income was $24.1 billion. Alphabet reported a 32% consolidated operating margin and 28% year-over-year net-income growth. These consolidated figures show the companies’ overall financial capacity, but they should not be mistaken for cloud-segment results.
Category-by-category winners
| Category | Winner | Why |
|---|---|---|
| Largest cleanly disclosed cloud segment | AWS | AWS reported $28.8 billion as a standalone segment. Microsoft Cloud was larger at $40.9 billion on a reported basis, but includes adjacent businesses. |
| Fastest reported cloud-related growth | Microsoft | Azure and other cloud services grew 31%, although the measure is broader than Azure alone. |
| Cloud operating profit | AWS | AWS reported $10.6 billion, versus Google Cloud’s $2.1 billion; Microsoft does not disclose comparable Azure profit. |
| Operating-margin improvement | Google Cloud | Margin rose from about 9.4% to 17.5%. |
| Enterprise ecosystem reach | Microsoft, strategically | This is an analytical assessment based on its broader commercial cloud portfolio, not a standalone earnings metric. |
| Disclosure comparability | AWS | Its segment reporting makes revenue and operating profit easier to evaluate directly. |
What these results mean for investors
Investors should avoid choosing a winner using growth alone.
- AWS offered the strongest combination of scale, disclosed operating profit, and margin expansion.
- Microsoft showed the strongest reported growth signal and significant AI monetization momentum, but its Azure economics are harder to isolate.
- Google Cloud combined rapid growth with the clearest evidence of improving profitability.
The most useful comparison therefore depends on the question. For current business economics, AWS leads. For reported growth, Microsoft leads narrowly. For turnaround potential and operating leverage, Google Cloud stands out.
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The earnings results suggest that all three providers are investing heavily to support AI workloads. They also imply that capacity, model availability, pricing, regional infrastructure, and enterprise integration will remain important competitive factors.
But earnings reports cannot establish which provider is cheapest or technically best for a particular workload. Buyers still need to evaluate GPU availability, service pricing, data-transfer and egress costs, discounts, committed-use contracts, security, compliance, geographic coverage, support, migration tools, Kubernetes portability, and model options.
For current commercial details, consult the providers’ official resources: AWS pricing, Azure pricing, and Google Cloud pricing. These pages are separate from the historical Q4 2024 earnings comparison.
What the earnings do not tell us
- Microsoft’s exact Azure revenue and operating profit.
- Whether any provider definitively gained market share.
- Customer-level return on AI investment.
- GPU availability or regional capacity at the time a buyer needs it.
- Future pricing, discounting, egress exposure, or contract terms.
- Customer churn, workload migration, or long-term infrastructure returns.
Those limits are why the comparison should be treated as a financial scorecard, not a complete cloud product review.
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