Cloud Capex to Cash: AWS Wins This Way, Alphabet Wins Another Way

Alex Sirois

Tue, September 8, 2026 at 6:34 PM GMT+3 4 min read

Quick Read

AWS posts a 39% operating margin on $42B in revenue while Google Cloud grows 82% year-over-year but lags on profitability.
Alphabet doubled long-term debt to $98B and suspended buybacks entirely to fund capex that surged 100% year over year.
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Amazon (NASDAQ:AMZN) and Alphabet (NASDAQ:GOOGL) both reported Q2 FY2026 results that put the same question in front of investors: how fast does cloud capex turn into cash? AWS delivered its fastest growth in 18 quarters, while Google Cloud accelerated to 82% year-over-year growth. Both are spending like wartime generals. Only one is monetizing at hyperscale margins today.

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AWS Prints Profit. Google Cloud Prints Growth.

AWS revenue reached $42.2 billion with operating income of $16.6 billion and a 39% operating margin. Andy Jassy said the AWS backlog now sits at $496 billion, roughly two and a half times the level of Q3 2025. Trainium and Graviton are doing real work here: Graviton is used by 98% of Amazon's top 1,000 EC2 customers, and the AI chips business already runs at more than $25 billion.

Google Cloud posted $24.77 billion in revenue, smaller than AWS but growing more than twice as fast. Sundar Pichai said nearly 90% of the Fortune 100 now use Gemini Enterprise, and the Gemini App has 950 million monthly active users. That is the full-stack pitch: models, TPUs, Search, and YouTube all reinforcing one another.

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Business Driver

AWS

Google Cloud

Q2 Revenue

$42.2B

$24.77B

YoY Growth

36.7%

82%

Segment Operating Margin

39%

Not disclosed this quarter

Capex Bills Come Due Differently

Amazon spent $53.1 billion on cash capex in Q2 and expects to double its power capacity by the end of 2027 versus 2025. Alphabet's capex hit $44.92 billion, up 100.1% year over year. Both companies ran negative free cash flow in the quarter.

The funding paths diverge sharply. Amazon covers its bills largely through operating cash flow of $45.4 billion plus debt. Alphabet raised approximately $70 billion in combined equity and debt, and suspended buybacks. Long-term debt jumped from $46.5 billion to $98.2 billion.

AWS Wins on Pure Profit. Alphabet Wins on Speed.

Jassy said server investments break even in a little less than three years, then generate cash across a 30-plus year data-center life. That is a long, patient conversion curve backed by proven margins. Alphabet's speed advantage is different: 82% cloud growth paired with 34% companywide operating margin means demand is compounding faster than at AWS, even if segment profitability lags.

Watching the 2027 Capacity Cliff

I want to see whether Amazon's $496 billion backlog actually flows through to free cash flow as promised, and whether Alphabet's Gemini enterprise footprint keeps pulling ahead of the growth curve into 2027. Memory and SSD inflation, flagged by Brian Olsavsky, could squeeze both.

Why I Split the Two for Different Investors

If you want proven cloud economics and a slower, surer cash payoff, AWS inside Amazon looks cleaner to me. The 39.4% AWS margin is doing real work while retail scales. If you want faster top-line acceleration and full-stack AI optionality, Alphabet fits, especially with 46.21% one-year returns already earned. I would hesitate on both if capex keeps outrunning cash into 2027.

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