IONOS vs SiteGround

Compare IONOS and SiteGround on capabilities, jurisdiction, assurance, and fit for European buyers.

Both listed as alternatives to: Bluehost, GoDaddy, Google Cloud Platform, Hostinger

Logo: IONOS

IONOS

Germany· Cloud Computing

Needs review

Shortlist IONOS when you want a German-operated hosting + public cloud stack with EU location choice, managed Kubernetes, S3 storage, and public BSI-oriented cloud certifications for DACH buyers. Skip when you need hyperscaler service breadth, EU-only infrastructure with no US regions or US facility partners in the path, or lowest-cost bare metal—consider OVHcloud, Scaleway, Hetzner, or STACKIT instead depending on that gap.

German SE (Montabaur)EU + US cloud regionsManaged KubernetesS3 Object StorageBSI C5 Type 1 (claimed)Domains + SMB hosting
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Logo: SiteGround

SiteGround

Bulgaria· Web Hosting and Cloud Computing

Needs review

Shortlist when you want managed WordPress or PHP hosting with an EU or UK contract, a named European Google Cloud region, and Site Tools. Skip when you need EU-owned metal with no US-group cloud. Consider IONOS, OVHcloud, Scaleway, or Hetzner instead in that case.

EU-operated (BG origin, ES/UK contracts)Managed WordPress / PHP hostingGoogle Cloud regions (not EU-only)Site Tools control panelSuperCacherDPA in TOS pack
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Highlighted rows differ between the two products.

IONOS vs SiteGround: Snapshot
FeatureLogo: IONOSIONOSLogo: SiteGroundSiteGround
Country of originGermanyBulgaria
CategoryCloud ComputingWeb Hosting and Cloud Computing
Open sourceNoNo
Self-hostedNoNo
HeadquartersGermanyBulgaria
Legal entityIONOS SE (HRB 24498, Amtsgericht Montabaur); group listed as IONOS Group SESiteGround Hosting EOOD (BG UIC 204181297). EU: Spain S.L. B-87194171. UK: Hosting Ltd 09348602. US storefront: SG Hosting Inc.
Governing lawGerman / EU (confirm per contract and national affiliate)Not listed
US parent / controlNo known US parentNo known US parent
CLOUD Act exposure (indicative)MediumMedium
Hosting / residencyIONOS-operated and partner facilities in Europe (e.g. Berlin, Frankfurt—including Equinix-operated sites—Paris, Logroño, London, Worcester, Karlsruhe) and the US (Las Vegas, Newark, Lenexa). Object Storage and compute location chosen per resource. Backup Service uses Acronis technology; managed backup path described as DE ISO 27001 centers. Optional Microsoft 365 / Google Workspace resale.Primary hosting: Google Cloud Platform in customer-chosen SiteGround regions (Europe: Madrid, Eemshaven, Frankfurt, Paris, London; plus US and APAC). CDN: SiteGround CDN on the Google Cloud edge network (global, including US). Backups: vendor says geographically separate / offsite on Cloud. No public dated subprocessor register found. Payments, analytics, and third-party AI models are mentioned in privacy/TOS.
Summary

German hosting and cloud provider (IONOS SE): domains and SMB web hosting plus IONOS Cloud IaaS/PaaS with EU and US locations, managed Kubernetes, object storage, and DBaaS.

Sofia-origin managed web and WordPress hosting on Google Cloud, with Site Tools, SuperCacher, and EU or UK contracting entities depending on storefront.

Tags
gdprcloudhostinginfrastructureiaaskubernetesgermanysmb
gdprweb-hostingwordpress-hostinggoogle-cloudmanaged-hostingbulgaria
At a glance: IONOS vs SiteGround
At a glanceLogo: IONOSIONOSLogo: SiteGroundSiteGround
HQMontabaur, Germany (IONOS SE)Not listed
GroupUnited Internet / IONOS Group SE (listed)Not listed
Product linesDomains & hosting + IONOS Cloud IaaS/PaaSNot listed
Cloud regionsDE, FR, ES, UK + US (e.g. LAS, EWR, MCI)Not listed
Open sourceNo (proprietary platform)Not listed
Self-hostNoNot listed
Commercial modelHosting packages + cloud usage (per-minute style)Prepaid subscription (shared StartUp/GrowBig/GoGeek and Cloud). Confirm live site.
HQ / originNot listedSofia, Bulgaria (founded 2004, privately owned)
EU contractNot listedSiteGround Spain S.L. (CIF B-87194171, Madrid)
UK contractNot listedSiteGround Hosting Ltd (09348602)
BG operating companyNot listedSiteGround Hosting EOOD (UIC 204181297)
US storefrontNot listedSG Hosting Inc. (Delaware)
InfrastructureNot listedGoogle Cloud (customer-chosen region + global CDN)
Control panelNot listedSite Tools (not cPanel)
Open source / self-hostNot listedNo / no
Key capabilities: IONOS vs SiteGround
Key capabilitiesLogo: IONOSIONOSLogo: SiteGroundSiteGround
German SE (Montabaur)YesNot listed
EU + US cloud regionsYesNot listed
Managed KubernetesYesNot listed
S3 Object StorageYesNot listed
BSI C5 Type 1 (claimed)YesNot listed
Domains + SMB hostingYesNot listed
EU-operated (BG origin, ES/UK contracts)Not listedYes
Managed WordPress / PHP hostingNot listedYes
Google Cloud regions (not EU-only)Not listedYes
Site Tools control panelNot listedYes
SuperCacherNot listedYes
DPA in TOS packNot listedYes

IONOS

  • Virtual Data Center Designer and IaaS compute

    Build isolated virtual data centers in the browser or via Cloud API: dedicated-core servers, vCPU servers, and Cubes with attached NVMe. Live vertical scaling is supported on many Linux images for cores, RAM, NICs, and volumes without a full rebuild. Locations span DE (Berlin, Frankfurt, Karlsruhe), FR, ES, UK, and US.

  • Managed Kubernetes without a separate control-plane fee

    Automated cluster and node-pool setup with geo-redundant control plane, admin API access, and optional node auto-scaling. IONOS documents the managed control plane as free of charge; you pay for the underlying compute, storage, and network only—useful for staging and production clusters on the same contract.

  • S3-compatible Object Storage across EU and US endpoints

    Contract-included Object Storage with S3 API compatibility, versioning, object lock, SSE-S3/SSE-C, and lifecycle rules. Documented endpoints include Frankfurt, Berlin, Logroño, and Lenexa (US). German object-storage locations are listed with BSI IT-Grundschutz compliance notes in the service catalog.

  • Managed databases, GPU VMs, and Berlin-hosted AI Model Hub

    DBaaS for PostgreSQL, MongoDB, MariaDB, and in-memory DB; Cloud GPU VMs (NVIDIA H200 templates) in Frankfurt; AI Model Hub with OpenAI-compatible APIs, RAG/vector support, and vendor-stated processing exclusively in Germany (Berlin). Fits teams that want European inference without standing up their own GPU estate.

  • Domains, web hosting, and personal consultant for SMBs

    Classic IONOS portfolio: domain registration, shared/VPS/dedicated hosting, site builders, and optional Microsoft 365 or Google Workspace. Differentiator for non-cloud buyers is a dedicated personal consultant plus 24/7 support channels—not pure ticket-only self-serve hosting.

SiteGround

  • Customer-chosen Google Cloud data center

    You pick a SiteGround location at signup and can relocate later from the Client Area (per site on shared plans, per plan on Cloud). Documented European data-center cities include Madrid, Eemshaven, Frankfurt, Paris, and London. US and APAC locations exist on the same map. The fleet runs on Google Cloud. This is not an EU-only host.

  • SuperCacher (NGINX, Dynamic Cache, Memcached)

    SiteGround's own caching stack: NGINX Direct Delivery for static files, Dynamic Cache in RAM for generated pages, and Memcached for database and API objects. All clients manage it in Site Tools > Speed > Caching. It is a host-level accelerator, not a substitute for application-level cache plugins when you need custom rules.

  • Site Tools instead of cPanel

    The company replaced cPanel with its in-house Site Tools panel for DNS, email, PHP, SSL, Git, backups, and caching. Useful if you want a single vendor UI. Poor fit if your runbooks assume WHM/cPanel, standard cPanel plugin hooks, or reseller WHM.

  • WordPress staging on mid-tier and Cloud plans

    A one-click staging copy, edit, and push-to-live flow is documented for GrowBig, GoGeek, and Cloud. The company says it takes an automatic backup before a staging push. StartUp is not listed as including this tool. Pair with the SiteGround Security plugin if you want the vendor's WP hardening pack.

  • Daily backups with self-serve restore

    Site Tools > Security > Backups lists automatic daily copies: up to 30 on shared plans, up to 7 on Cloud. Restores can be full or files/database only. Academy copy says shared backups are stored in a geographically separate location. Premium Backup is a paid add-on. Destination cloud for those copies is not published as a separate provider list.

  • Server-level WAF and AI anti-bot

    The company describes a custom WAF with rules written by its security team for common CMS exploits, plus an AI anti-bot layer that it says blocks large volumes of brute-force traffic before it hits customer sites. These are vendor-operated controls, not a customer-auditable WAF appliance you can export rules from.

Assurance & compliance: IONOS vs SiteGround
Assurance & complianceLogo: IONOSIONOSLogo: SiteGroundSiteGround
Independent security / cloud audit (beyond marketing)
Partial

BSI C5 Type 1 (2023 announcement) and IT-Grundschutz ISMS claims after external audit; not a public no-logs VPN-style audit. Request current reports and scope.

Not found

No public independent security or no-logs audit PDF found. Vendor describes in-house WAF and AI anti-bot.

ISO 27001
Vendor claimed

Vendor FAQ/about materials state ISO 27001 for data centers / security posture; facility partner cert PDFs also referenced on location pages. Independent cert registry entry not re-verified here.

Not found

No current SiteGround ISO 27001 certificate found. 2021 staff comment: not certified; rely on Google Cloud certifications.

SOC 2 / SOC 3
Not found

SOC/SSAE-style attestations appear for some facility operators (e.g. Equinix listings). No clear IONOS product-level SOC 2 claim found on primary pages reviewed.

Not found

No SiteGround SOC 2/3 report found. Historical support replies pointed customers at Google Cloud documentation.

BSI C5 (Cloud Computing Compliance Criteria Catalogue)
Vendor claimed

Company IR announcement 7 Nov 2023: C5 Type 1 for Compute Engine, Cloud Cubes, S3 Object Storage after external audit. Type 1 = design at a point in time; confirm current validity and product scope.

Not listed
GDPR / EU data protection
Vendor claimed

German controller/processor entities; EU location options; vendor GDPR statements. Residency still depends on selected regions and subprocessors.

Vendor claimed

EU/UK entities and public DPA in the TOS pack. Controller depends on storefront (Spain SL vs UK Ltd vs US Inc).

US CLOUD Act exposure (indicative)
Partial

German SE / no known US parent, but US subsidiaries, US host regions (LAS/EWR/MCI), Equinix facility partnership, optional Microsoft/Google products, Acronis-powered backup. Not legal advice.

Partial

European HQ and contracting for EU/UK, no known US parent, but primary infrastructure is Google Cloud (US-group) with optional US regions and a global GCP CDN. Not legal advice.

Data processing agreement (B2B)
Vendor claimed

Hosting DPA via account privacy flows; IONOS Cloud AVV via account manager / contract docs. Confirm entity and service annex.

Vendor claimed

DPA is incorporated in the TOS pack for EU/UK storefronts.

EU AI Act
Partial

Relevant mainly to AI Model Hub (docs discuss governance/compliance). Core hosting/IaaS is not AI-product-centric; treat AI Act as service-specific diligence.

Not found

Product includes Coderick AI and AI Studio. No public AI Act classification or compliance statement found. TOS says third-party providers may use Inputs/Outputs to improve models.

Considerations & known limitations: IONOS vs SiteGround
Considerations & known limitationsLogo: IONOSIONOSLogo: SiteGroundSiteGround
US regions, US entities, and facility partners
Medium

Selecting US locations places data in the US. Even EU-only deployments sit in a group that has US subsidiaries and uses partners such as Equinix for some EU facilities—material for CLOUD Act / transfer reviews.

Not listed
No clear public subprocessor catalogue
Medium

Unlike many pure SaaS vendors, a single customer-facing subprocessor list was not found. Buyers must extract partners from location pages, DPA annexes, and product docs (Equinix, Acronis, Microsoft, Google, etc.).

Not listed
C5 Type 1 scope and freshness
Low

Public C5 claim is Type 1 for specific products (Compute Engine, Cubes, Object Storage) as of the 2023 announcement. Not a blanket certificate for every IONOS product; request up-to-date reports.

Not listed
Narrower managed ecosystem than hyperscalers
Low

Strong IaaS and selected PaaS, but not a full AWS/Azure service catalogue. Multi-region global apps and niche managed services may force multi-cloud or a different primary vendor.

Not listed
Hosting brand vs cloud platform complexity
Low

SMB hosting contracts, reseller office suites, and enterprise cloud AVVs are different commercial and compliance surfaces—do not assume one DPA covers every SKU.

Not listed
Google Cloud as primary infrastructureNot listed
Medium

Since 2020 SiteGround has run hosting on Google Cloud. A European region does not remove US-group cloud exposure. Badging this product as EU-only infrastructure would be wrong.

Contracting entity depends on storefrontNot listed
Medium

The same brand signs as Spain S.L., UK Ltd, or Delaware Inc. depending on scid/region. US privacy.htm names SG Hosting Inc. as controller. Procurement must capture the entity on the order, not the brand name.

Vendor can relocate data centersNot listed
Medium

TOS 4.2 allows SiteGround to move accounts between data centers or jurisdictions for quality, continuity, or security. Non-emergency jurisdiction changes have a 10-day objection window. Emergency moves may happen without prior notice.

No public SiteGround ISO/SOC certificateNot listed
Medium

Assurance for many RFPs will be Google Cloud's reports plus SiteGround's DPA and internal WAF, not a SiteGround ISO 27001 or SOC 2 badge.

Third-party AI may retain Inputs and OutputsNot listed
Medium

TOS 4.6.3: third-party AI providers may store and use Inputs and Outputs to provision and improve models. SiteGround advises against putting confidential or personal data in prompts.

No standalone public subprocessor registerNot listed
Low

Google Cloud is named. A dated annex listing backup, email, support, analytics, and payment subprocessors was not found as a standalone page.

Fit

IONOS

Best fit when

  • SMB and agencies needing domains, hosting, email/office resale, and a personal consultant under one German brand
  • Teams building IaaS workloads in selectable EU locations with a visual Data Center Designer and full Cloud API
  • Organizations that want managed Kubernetes, DBaaS, and S3-compatible storage without a hyperscaler contract
  • DACH public-sector or regulated buyers who need documented BSI C5 / IT-Grundschutz posture on scoped cloud products (confirm current report)
  • AI or inference pilots that prefer vendor-stated Germany (Berlin) hosting for AI Model Hub

Poor fit when

  • Buyers requiring a guarantee of no US legal entities, no US regions, and no US-group facility partners anywhere in the path
  • Workloads that depend on the full AWS/Azure/GCP marketplace, global region density, or niche managed services IONOS does not offer
  • Price-only bare-metal or Hetzner-style DIY shops that do not need managed PaaS or SMB hosting layers
  • Teams that refuse any US-group SaaS (Microsoft 365 / Google Workspace) if those bundles are part of the intended stack

Consider instead when

  • When: You want French-operated cloud with strong developer packaging and EU focus without a mass-market hosting brand

    Consider: Scaleway

    Different product mix; compare region map and managed services side by side.

  • When: You prioritize large European hosting/cloud scale and multi-country DC ownership narratives

    Consider: OVHcloud

    Both are EU groups with non-trivial international footprints—read residency options carefully.

  • When: You mainly need cost-efficient dedicated servers or simple cloud in DE/FI with minimal PaaS

    Consider: Hetzner

    Thinner managed layer; different support and SMB hosting model.

  • When: You are already in Schwarz Group ecosystems or need STACKIT-specific public-cloud positioning

    Consider: STACKIT

    Narrower commercial brand than IONOS hosting+cloud combo.

SiteGround

Best fit when

  • Agencies and SMBs that want managed WordPress or PHP hosting with 24/7 vendor support and Site Tools instead of raw VMs
  • EU buyers who will contract with SiteGround Spain S.L. and pin production to Madrid, Eemshaven, Frankfurt, or Paris
  • UK buyers who will contract with SiteGround Hosting Ltd and can use the London Google Cloud location
  • Teams that want SuperCacher, daily self-serve restores, and (on GrowBig/GoGeek/Cloud) one-click staging
  • Workloads that already accept Google Cloud as infrastructure and need a managed layer on top

Poor fit when

  • Organisations that ban US-group clouds (AWS/GCP/Azure) regardless of region
  • Buyers who need a public ISO 27001 or SOC 2 certificate in SiteGround's own name
  • Teams whose automation depends on cPanel/WHM rather than Site Tools
  • IaaS, Kubernetes, or root-server use cases better served by IONOS Cloud, OVHcloud, Scaleway, or Hetzner
  • StartUp-plan sites that require staging (documented on GrowBig, GoGeek, and Cloud only)

Consider instead when

  • When: You need EU-owned infrastructure with no Google Cloud or other US-group IaaS underneath

    Consider: IONOS, OVHcloud, Scaleway, or Hetzner

    Those peers are closer to metal or EU public cloud. SiteGround is a managed host on GCP.

  • When: You want a European-origin shared host comparison rather than IaaS

    Consider: Hostinger (catalog incumbent) or Swissnode

    Different panels and footprints. Confirm each operator's contracting entity and hoster.

  • When: You need a current ISO 27001 or SOC 2 report from the hosting brand itself

    Consider: IONOS or another certified EU host after checking their live trust center

    SiteGround staff said in 2021 they were not ISO certified. Relying on GCP certs is not the same as a SiteGround cert.

Open questions for due diligence

IONOS

  • What is the current BSI C5 report type (Type 1 vs Type 2), validity period, and exact product/location scope?
  • Can IONOS provide a consolidated subprocessor and sub-processor change-notification list under the DPA/AVV?
  • Which contract entity (IONOS SE vs IONOS Cloud GmbH vs national affiliates) will sign for our workload and which TOMs apply?
  • For EU-only deployments, are any support, monitoring, or backup control-plane components processed outside the EU?
  • Is ISO 27001 held by IONOS operating companies for the full service stack, or primarily facility/operator certifications?

SiteGround

  • Which exact legal entity and TOS scid will this order use (Spain S.L., UK Ltd, or US Inc.)?
  • Will SiteGround contractually lock the production region (for example Eemshaven or Madrid) and notify before any jurisdiction change?
  • Can they provide a current subprocessor list covering backups, email, support, analytics, payments, and AI vendors?
  • Is there a current ISO 27001, SOC 2, or other audit letter in SiteGround's name, or only Google Cloud shared-responsibility materials?
  • For AI Studio / Coderick: which model vendors are used, is training on customer Input disabled under a B2B addendum, and is there an AI Act position?