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⚠ Cloud CompetitionModerate threat

Amazon (AMZN) — threat to the moat

AWS's lead is real and its rivals are two of the richest companies on earth — first place is re-earned every quarter.

Amazon Web Services is the company's profit engine — the business that funds everything else, 57% of operating income in 2025 and 63% in the third quarter of 20261 — which is exactly why the intensifying competition for the cloud is a threat worth taking seriously. AWS invented the modern cloud and long enjoyed a commanding lead, but it no longer has the field to itself2. Microsoft's Azure and Google Cloud, each with vast resources and its own strategic reasons to win, have for several years grown faster in percentage terms, and in the crucial new arena of artificial intelligence the race has become especially fierce.

AWS operating income, 2019-2025 ($B)$9.2B2019$13.5B2020$18.5B2021$22.8B2022$24.6B2023$39.8B2024$45.6B2025Amazon Forms 10-K FY2020-FY2025
AWS operating income nearly quintupled in six years, to $45.6B; that is what a rival would be taking a share of.

The danger is not that AWS collapses but that it is squeezed — that competition erodes its share of new workloads, its growth rate, and above all its pricing power. Cloud computing has elements of a commodity, and with several capable providers courting the same customers, the pressure on margins is real. If AWS's fat profitability were to thin meaningfully, the effect would ripple through all of Amazon, because those cloud profits are what allow the retail business to run on razor-thin margins and to keep reinvesting.

The defenses proved themselves in 2026, when AWS accelerated for six straight quarters to 39% growth in the third, its fastest in nearly five years3, on the back of its own AI stack: the Trainium chips, the Bedrock model platform, and a backlog of committed spending that reached $496 billion at its last disclosure4. The first-mover scale, the breadth of services, and the deep switching costs all endure, and the market is growing fast enough that AWS can cede some share and still grow handsomely in absolute terms.

A long-term owner should watch AWS's growth rate and margins as closely as any single figure in the company, because so much depends on them. This is not a threat to the moat's existence — the switching costs and scale are genuine and durable — but a threat to how profitable that moat remains as capable competitors press in. The prudent view is that AWS keeps a strong position in a fast-growing market, but the era of nearly unchallenged dominance is giving way to something more competitive, and the profits that flow to the rest of Amazon may feel it.

The number that tests this threat
Reported
AWS's share of company profit (what competition threatens)
AWS ≈ 63% of operating income ($17.8B of $28.1B in Q3 2026)

AWS is 23% of revenue but 63% of the quarter's operating income and 58.5% of the trailing year's — the profit engine that funds everything else — which is exactly why competition from Azure and Google Cloud matters. A few points of AWS margin or growth swing the whole company. Watch AWS growth and operating margin against its two rivals.

Source: Amazon Q3 2026 results release (Form 8-K, Exhibit 99.1) — segment results ↗
References
  1. Moat Explorer calcAmazon Web Services is the company's profit engine — the business that funds everything else, 57% of operating income in 2025 and 63% in the third quarter of 2026 — which is exactly why the intensifying competition for the cloud is a threat worth taking seriously.
    Moat Explorer calculation from Amazon's third-quarter 2026 results release and Form 10-K segment tables: AWS share of consolidated operating income = $45,606M / $79,975M = 57.0% for 2025, $17,773M / $28,076M = 63.3% in Q3 2026 and $61,020M / $104,366M = 58.5% over the twelve months to September 2026; AWS share of net sales = $128,725M / $716,924M = 18.0% for 2025, $45,984M / $201,944M = 22.8% in Q3 2026 and $161,382M / $797,455M = 20.2% trailing; North America segment operating margin = minus $2,847M / $315,880M = minus 0.9% in 2022 against the 8.2% trailing margin the Q3 2026 supplemental table reports; the increase in other assets = $358,775M less $122,607M = $236,168M; AWS revenue per quarter rising 17%, 20%, 24%, 28%, 37% and 39% excluding currency across Q2 2025 to Q3 2026; and shipping-cost growth of 11% against paid-unit growth of 12% in Q3 2026, one point of volume growth above cost — FY2022 — Q3 2026 · publ. 2026 · source ↗
  2. Third-party estimateAWS invented the modern cloud and long enjoyed a commanding lead, but it no longer has the field to itself.
    Synergy Research / Canalys — cloud infrastructure share and growth (AWS ~30%; Azure and Google Cloud growing faster in percentage terms) — Recent quarters · publ. 2025-2026 · source ↗
  3. ReportedThe defenses proved themselves in 2026, when AWS accelerated for six straight quarters to 39% growth in the third, its fastest in nearly five years, on the back of its own AI stack: the Trainium chips, the Bedrock model platform, and a backlog of committed spending that reached $496 billion at its last disclosure.
    Amazon.com, third-quarter 2026 results release (Form 8-K, Exhibit 99.1) — net sales $201,944M (+12%, +13% excluding a $0.9B unfavorable foreign-exchange impact), operating income $28,076M (+61%) at a 13.9% operating margin, described in the release's own headline as Amazon's highest operating margin ever; net income $20,685M and diluted EPS $1.89, both lower than the $21,187M and $1.95 of third quarter 2025, which the release attributes primarily to $9.5B of pre-tax gains on the investments in Anthropic recorded in that earlier quarter; total non-operating expense of $1,207M in the quarter (interest income $1,187M, interest expense $1,691M against $538M, other expense $703M) against non-operating income of $10,748M a year earlier; segment results North America net sales $112,852M (+6%) and operating income $8,723M (7.7% margin against 4.5%), International $43,108M (+5%, +8% excluding currency) and $1,580M (3.7% against 2.9%, +42% excluding currency), AWS $45,984M (+39%, its fastest growth in nearly five years, a $184 billion annualised revenue run rate) and $17,773M (38.7% margin against 34.6%); net sales mix North America 56%, International 21%, AWS 23%; the Prime Day timing shift, with the event in the second quarter this year for most large countries and entirely in the third quarter in 2025, without which third-quarter growth would have been approximately 400 basis points higher; net sales by product line online stores $68,470M (+2%), third-party seller services $46,492M (+9%, +10% excluding currency), advertising services $19,637M (+11%, +12% excluding currency, after 22% excluding currency in each of Q2 2025, Q3 2025, Q4 2025 and Q1 2026 and 26% in Q2 2026), subscription services $14,006M (+11%), physical stores $5,710M, other $1,645M; worldwide shipping costs $28,295M (+11%) against worldwide paid unit growth of 12% and a seller unit mix of 61%; employees 1,638,000 (+4%); trailing-twelve-month net sales $797,455M, operating income $104,366M at a 13.1% margin, net income $134,779M and diluted EPS $12.37, operating cash flow $168,300M (+29%), purchases of property and equipment net of proceeds $210,657M (+82%) and free cash flow of minus $42,357M against plus $14,788M a year earlier, with the supplemental table's trailing free-cash-flow series $18,184M, $14,788M, $11,194M, $1,232M, minus $7,604M and minus $42,357M for Q2 2025 to Q3 2026 and North America's trailing operating margin at 8.2%; purchases of property and equipment of $77,259M in the quarter and $175,670M in nine months; nine-month other income of $68,359M and a $78,788M pre-tax change in net unrealized gains on available-for-sale debt securities recorded in other comprehensive income; proceeds from long-term debt of $48,102M in the quarter and $115,100M in nine months, taking long-term debt from $65,648M at December 31, 2025 to $173,125M, total assets from $818,042M to $1,243,390M and other assets from $122,607M to $358,775M; Andy Jassy's statement of projected AWS revenue growth rates “of over 40% both in 2027 and in 2028”; and fourth-quarter 2026 guidance of $240.0-247.0B of net sales (+12% to +16%) and $28.5-33.5B of operating income against $25.0B, with 2026 cash capital expenditures still expected to be approximately $220 billion and fourth-quarter advertising revenue expected to grow in the high teens — Q3 2026 — quarter ended September 30, 2026 · publ. October 29, 2026 · source ↗
  4. ReportedThe defenses proved themselves in 2026, when AWS accelerated for six straight quarters to 39% growth in the third, its fastest in nearly five years, on the back of its own AI stack: the Trainium chips, the Bedrock model platform, and a backlog of committed spending that reached $496 billion at its last disclosure.
    Amazon.com Inc., Form 10-Q for the quarter ended June 30, 2026 — purchases of property and equipment $54,208M in Q2 2026; remaining performance obligations of approximately $496 billion (weighted-average remaining life 6.4 years), after OpenAI expanded its existing $38.0 billion commitment by $100.0 billion over 8.0 years in Q1 2026 and Anthropic expanded its commitment by more than $100.0 billion over 10.0 years in Q2 2026; upward adjustments to private equity investments of $50.5 billion in Q2 2026 and $62.8 billion in the six months, primarily nonvoting preferred stock in Anthropic; about $640 million of IEEPA tariff refunds recorded mainly as a reduction to cost of sales; shipping costs $27.9 billion against $23.4 billion — Q2 2026 — quarter ended June 30, 2026 · publ. July 2026 · source ↗
Sources
Generated October 30, 2026