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Sovereign Cloud Stack Review

Depends

Should I use Sovereign Cloud Stack?

Compatible by Design. Open by Default. - sovereigncloudstack.org

· 1 month ago

Buy into this only if you're a European cloud provider or a large organization with platform engineers who must run sovereign OpenStack infrastructure. If you just need EU hosting, don't build — rent from an SCS-compatible provider instead.

Confidence

Medium. Based on ~40 public sources; no review-site ratings exist for this initiative and many snippets were truncated.

Ratings

  • Value for money
  • Ease of use
  • Feature depth
  • Support quality
  • Security posture

Pricing

Free software

Open source (self-hosted)

ModelNot disclosed
Monthly feesNot disclosed
HardwareNot disclosed
Free tierYes

Best for

  • European cloud providers
  • Public-sector and regulated workloads
  • Orgs with dedicated platform teams
  • Strict GDPR and data-sovereignty needs

Not for

  • Small teams needing simple hosting
  • Startups without ops engineers
  • Buyers wanting click-to-deploy managed cloud
  • Non-EU orgs with no sovereignty mandate

Gotchas - check before you buy

high

Free software, not a free cloud: hardware and engineers are your cost

medium

Advisories cover upstream OpenStack CVEs; patching cadence is yours to manage

medium

Support quality varies by partner provider, not by SCS itself

medium

Migrating between SCS clouds still requires workload migration effort; check certifications

Pros and cons

Pros

  • Fully open-source IaaS stack; no vendor lock-in by design
  • Standardized, certified SCS-compatible clouds across European providers
  • Publishes security advisories and runs automated pentesting
  • Actively developed; R9 released after R8
  • European data-sovereignty alternative to US hyperscalers

Cons

  • You run OpenStack yourself; needs serious platform engineering
  • Not a hosted product; no signup or console
  • Sovereignty only holds if operator and hardware are EU-controlled
  • Compatibility depends on providers certifying against SCS standards

Sources & method

- 12 sources - Actively maintained open-source stack; SCS publishes advisories for upstream OpenStack CVEs; no SCS platform breach found in sources.

official x5review x3security x2news x2
  • Ironic image-processing vulnerability (CVE-2024-44082), SCS published an advisory covering a vulnerability in Ironic image processing; see advisory for affected and fixed versions.
  • OVN vulnerability advisory (CVE-2024-2182), SCS published a security advisory for an OVN flaw; remediation details in the advisory.
  • Spooky SSL advisory, SCS advisory on an X.509 certificate-parsing vulnerability; check upstream fix status.
  • OpenStack OAuth2 privilege escalation (CVE-2026-22797), SCS documented an OpenStack privilege-escalation issue via OAuth2 token flows.

Key stats

  • Value for money: 4/5

    Rating

  • Free software

    Starting price

  • 12

    Sources

  • Analyzed

  • Value for money: 4/5. No license fees; costs are hardware and staffing
  • Ease of use: 2/5. Full OpenStack deployment; heavy ops expertise required
  • Feature depth: 4/5. Complete IaaS plus standards, monitoring, images, pentesting
  • Support quality: 3/5. Community plus partner support; no single vendor SLA
  • Security posture: 4/5. Publishes advisories; runs automated IaaS pentesting
  • July 2021 Founded Project start per official site
  • R9 Latest release R8 shipped previously
  • €0 (open source) License cost Free software; you pay infra and ops
  • Sprind Backer German federal agency for disruptive innovation

Pricing

Open source (self-hosted)

Free software

  • Full OpenStack-based IaaS
  • You operate hardware and platform yourself
  • Managed option via SCS partner providers

Security

Actively maintained open-source stack; SCS publishes advisories for upstream OpenStack CVEs; no SCS platform breach found in sources.

  • Ironic image-processing vulnerability (CVE-2024-44082)SCS published an advisory covering a vulnerability in Ironic image processing; see advisory for affected and fixed versions.⁷
  • OVN vulnerability advisory (CVE-2024-2182)SCS published a security advisory for an OVN flaw; remediation details in the advisory.
  • Spooky SSL advisorySCS advisory on an X.509 certificate-parsing vulnerability; check upstream fix status.
  • OpenStack OAuth2 privilege escalation (CVE-2026-22797)SCS documented an OpenStack privilege-escalation issue via OAuth2 token flows.

What users say

discussion comes mainly from cloud operators, partners, and sovereignty advocates; independent end-user reviews are scarce.

Companies that use it

  • ScaleUp Technologies⁸
  • OSISM (stackxperts)

Companies that could

  • KPN Uses STACKIT sovereign cloud (with Schwarz Digits) instead
Full analysis

Based on ~40 public sources; no review-site ratings exist for this initiative and many snippets were truncated.

Open-source European sovereign cloud blueprint. Great for providers and big ops teams; overkill if you just need EU hosting.

Methodology

Based on ~40 public sources; no review-site ratings exist for this initiative and many snippets were truncated.

Read how a report is made.

Sources

  1. Digital sovereignty in the cloud — SCS official sitesovereigncloudstack.org
    official
  2. Sovereign Cloud Stack on GitHubgithub.com
    official
  3. SCS FAQdocs.scs.community
    official
  4. SCS R9 releasesovereigncloudstack.org
    official
  5. SCS standards overviewgithub.com
    official
  6. Automated pentesting for IaaSdocs.scs.community
    security
  7. Ironic CVE-2024-44082 advisorysovereigncloudstack.org
    security
  8. ScaleUp Technologies SCS partnershipscaleuptech.com
    news
  9. Sprind project pagesprind.org
    news
  10. How to Build a Sovereign AI Cloud on Bare Metal GPUsvcluster.com
    review
  11. OpenStack observability with SCSadmin-magazine.com
    review
  12. SCS — an honest review (video)youtube.com
    review

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