7 best sovereign cloud options for EU public sector software vendors in 2026

EU public-sector cloud procurement in 2026 increasingly focuses not only on EU data residency but also on operational control and insulation from foreign legal demands, requiring software vendors to match infrastructure choices precisely to tender language. The comparison distinguishes AWS European Sovereign Cloud as a separate EU-operated hyperscaler partition, Google Cloud Sovereign Controls as configurable safeguards on standard regions with partner and air-gapped options, and Microsoft Cloud for Sovereignty as a governance layer over commercial Azure regions, while noting that French and German providers such as OVHcloud, Scaleway, STACKIT, IONOS, Open Telekom Cloud, 3DS Outscale, and Cloud Temple may better meet no-US-parent, SecNumCloud, or BSI C5 requirements. AWS is positioned for EU-only operations on a hyperscaler stack, Google for flexible controls and mature Kubernetes, Microsoft for customers deeply integrated with Microsoft 365 and Entra ID, and European providers for stricter national sovereignty clauses despite generally smaller service catalogues. The discussion emphasizes that certifications apply to specific services rather than entire providers, EUCS remains unadopted, and legal protection from US extraterritorial requests remains debated even for EU-based subsidiaries of US companies. It also argues that the largest practical challenge is supporting the same software across several required jurisdictions, recommending portable components such as Kubernetes, PostgreSQL, S3-compatible storage, OIDC, and OpenTelemetry, supported by a common deployment workflow rather than separate cloud-specific platforms.

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