This page ranks the same industry from the buying side. The ten providers here book roughly US$1.78 trillion in combined revenue and sit on contracted backlogs that exceed US$1.3 trillion — Microsoft's commercial remaining performance obligation alone reached US$627 billion, Oracle's RPO US$553 billion and SAP's cloud backlog €77 billion. Cloud infrastructure spending was about US$419 billion in 2025 and grew faster than 30% into 2026, and the same three providers that lead the brand table also carry more than 65% of that spend. What changes on this page is the order below them.
We score providers on delivered capability rather than brand pull. Revenue and share carry 30%, category purity 25%, segment leadership 20%, enterprise and government stickiness 15% and self-operated infrastructure 10%. The stickiness input is what separates this ranking from the brand edition: it uses audited remaining performance obligations, disclosed net revenue retention and the share of revenue that is recurring subscription rather than one-off licence or services. A provider that cannot publish comparable backlog or retention figures is scored conservatively even where its product is well regarded.
The result is a table that splits into three tiers. Microsoft, Amazon Web Services and Google Cloud form the hyperscale base, with 34 to 40 regions each and more than 65% of infrastructure spend between them. Oracle, SAP and IBM form the mission-critical tier: systems that hold the ledger, the factory schedule and the transaction record, where replacement cycles are measured in years and the contract is renewed before it expires. Salesforce, Alibaba Cloud, Adobe and ServiceNow fill the workflow, creative and platform tier, each dominant inside a specific job rather than across the stack — which is why ServiceNow enters this table at tenth, a place it does not hold on the brand ranking.
Figures are taken from audited annual reports and the latest quarterly filings as of October 2026, with hardware manufacturing and first-party retail removed from the revenue base. Contingent or disputed obligations are excluded from backlog totals. Where a provider reports in a currency other than the dollar, the average rate for the fiscal period is used, so year-on-year comparisons stay consistent across the table.