⚠ The Lead NarrowsModerate threat

Amazon (AMZN) — threat to the moat

Azure and Google Cloud grow faster in percentage terms — first place erodes at the margin.

AWS invented the cloud and still leads it, but leads are measured at the margin, and at the margin the gap has been closing. Microsoft's Azure and Google Cloud have for several years grown faster in percentage terms than AWS1, chipping at its share of new workloads — Azure on the back of its enterprise relationships and its OpenAI partnership, Google on its data and AI research. In the crucial new arena of AI, all three are racing, and AWS no longer sets the pace unchallenged.

AWS sales growth year on year (%)15.8%Q1'2312.3%Q317.2%Q1'2419.1%Q316.9%Q1'2520.2%Q328.4%Q1'2636.8%Q2Calc from Amazon quarterly results releases (Form 8-K, Ex. 99.1)
Growth bottomed near 12% in 2023 and has roughly tripled since, to 36.8% in Q2 2026.

The danger is not that AWS shrinks but that it slips from dominant to merely first-among-equals. If rivals keep winning a disproportionate share of new AI workloads, AWS's growth premium erodes and, more importantly, so does the perception of inevitability that helps it win the next enterprise. Cloud is a game of momentum as much as scale, and momentum has lately favored the challengers.

AWS answered in 2026 by reaccelerating from 17% growth a year earlier to 28% in the first quarter and 37% in the second, its fastest in eighteen quarters2, as its own AI stack of Trainium chips and the Bedrock model platform began to bite, and its contracted backlog doubled in a year to $496 billion3. The market is also growing fast enough that all three giants can thrive at once; share loss and handsome growth are not mutually exclusive.

Put it at moderate. The percentage-growth gap is real and reflects genuine competitive pressure, particularly in AI, and a durable loss of momentum would matter to the profit engine — but AWS's re-acceleration shows the lead is being defended, not surrendered, and the pie is expanding fast enough to reward more than one winner.

References
  1. Third-party estimateMicrosoft's Azure and Google Cloud have for several years grown faster in percentage terms than AWS, chipping at its share of new workloads — Azure on the back of its enterprise relationships and its OpenAI partnership, Google on its data and AI research.
    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 ↗
  2. ReportedAWS answered in 2026 by reaccelerating from 17% growth a year earlier to 28% in the first quarter and 37% in the second, its fastest in eighteen quarters, as its own AI stack of Trainium chips and the Bedrock model platform began to bite, and its contracted backlog doubled in a year to $496 billion.
    Amazon.com, second-quarter 2026 results release (Form 8-K, Exhibit 99.1) — net sales $200.6B (+20%), operating income $27.5B (13.7% margin), AWS sales $42.2B (+37%, fastest growth in 18 quarters, $169B annualized run rate) and operating income $16.6B (39.4% margin, against 32.9% a year earlier), advertising $19.8B (+26%), online stores +15%, third-party seller services +16%, net income $62.6B including $53.4B of non-operating income primarily from investments in Anthropic, TTM operating cash flow $161.4B against net capital purchases $169.0B and free cash flow -$7.6B; AWS AI business and chips business each above a $25B run rate; Trainium commitments from Anthropic and OpenAI; Amazon Leo at nearly 400 satellites, enough to begin initial service this year; Zoox's NHTSA Part 555 exemption to charge for rides; Alexa+ triers signing up for Prime at a nearly 25% higher rate; supplemental table Q1 2025-Q2 2026 (WW shipping cost growth 3%, 6%, 8%, 10%, 14%, 19%; WW paid unit growth 8%, 12%, 11%, 12%, 15%, 17%; seller unit mix 60-62%; North America TTM operating margin 7.4%); Q3 2026 guidance of $197.0-202.0B net sales and $22.5-26.5B operating income, with growth nearly 400 basis points higher excluding Prime Day in both years — Q2 2026 — quarter ended June 30, 2026 · publ. July 30, 2026 · source ↗
  3. ReportedAWS answered in 2026 by reaccelerating from 17% growth a year earlier to 28% in the first quarter and 37% in the second, its fastest in eighteen quarters, as its own AI stack of Trainium chips and the Bedrock model platform began to bite, and its contracted backlog doubled in a year to $496 billion.
    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 September 22, 2026