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IONOS

German hosting and cloud provider controlled by United Internet AG, with own data centers in DE/FR/GB/ES/US and BSI C5 + IT-Grundschutz certifications.

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About IONOS

IONOS SE is a German hosting and cloud-infrastructure provider headquartered at Elgendorfer Strasse 57, 56410 Montabaur. The operating entity has its roots in 1&1 Internet (founded 1988) and was rebranded to IONOS in 2020. Products span web hosting, domain registration, Cloud Compute (IaaS), Managed Kubernetes, S3-compatible Object Storage, Software-Defined Data Center, managed Nextcloud, an AI Model Hub (launched 1 August 2024) and an SSL business through DigiCert.

The listed parent, IONOS Group SE & Co. KGaA, IPO'd on Frankfurter Wertpapierbörse on 8 February 2023 (ticker IOS, ISIN DE000A3E00M1) and joined the SDAX index in September 2023. After Warburg Pincus fully exited in March 2025, United Internet AG (Montabaur, ticker UTDI) remains the controlling shareholder at approximately 64% of IONOS Group SE. FY2024 group revenue was EUR 1,560.3 million (+9.6% YoY) with 6.32 million customers; FY2025 closed at approximately 6.63 million customers and 4,115 employees. IONOS is a GAIA-X consortium member and was awarded the 5-year cloud contract for ITZBund (Federal Information Technology Centre) in April 2024 to serve approximately 200 German federal agencies.

Features

  • 29 operated data centres (10 cloud IaaS: Frankfurt 1+2, Berlin, Paris, London, Worcester, Logroño, Las Vegas, Newark, Lenexa)
  • Self-built network: AS8560 since 2001; authoritative DNS on ns-1and1.ui-dns anycast cluster; no third-party CDN on customer paths
  • Verbatim residency policy: 'IONOS Cloud does not move customer data to other locations without the customer's consent'
  • Customer-selectable residency via Data Center Designer; DPA bundled into GTC since July 2022
  • Certifications: ISO 27001, BSI C5 Type 1, BSI IT-Grundschutz (first German cloud provider with both), PCI DSS, ISAE 3402, ISO 9001, ISO 50001
  • Apr 2024 ITZBund (Bundes-IT) contract: 5-year private cloud for ~200 German federal agencies, air-gapped IaaS / PaaS / DB / block storage
  • GAIA-X consortium leader in 6 funded projects (Marispace-X etc.); CISPE board member; 100% renewable energy in DE + UK data centres
  • Web Hosting (MyWebsite / Creator / WordPress); Cloud Compute (per-minute billing); Bare Metal; Managed Kubernetes; S3; Cloud Cubes
  • AI Model Hub (Llama / Mistral / gpt-oss / FLUX.1); IONOS Nextcloud Workspace (sovereign M365 alt, DE-hosted); M365 + Google Workspace reseller

Sovereignty Scorecard

Procurement-grade signals on data sovereignty, ownership, and EU residency.

The SHIELD framework

We score every European vendor against six sovereignty dimensions captured in the SHIELD acronym. Each card below maps to one letter — read them as a checklist when comparing providers.

S
Subprocessors

The third parties that touch customer data — payment processors, KYC vendors, support chatbots, analytics.

H
Headquarters & ownership

Where the legal entity sits, who controls it, and which subsidiaries operate under the same group.

I
Infrastructure & residency

Where customer data is physically stored, who runs the hosting stack, which CDN sits in front.

E
Exposure

Whether the vendor or its subprocessors fall under the US CLOUD Act or other extraterritorial reach.

L
Legal documents

Public terms, privacy policy, DPA, subprocessor list, impressum, and security or trust pages.

D
Diligence

Independent audits and certifications (ISO 27001, BSI C5, TISAX, SOC 2) plus open-source transparency.

Ownership

Publicly traded

European majority control

Parent: United Internet AG (Germany)

IONOS Group SE & Co. KGaA is listed on Frankfurter Wertpapierboerse SDAX (ticker IOS, ISIN DE000A3E00M1) since 8 February 2023 (IPO). Post-IPO shareholder structure: United Internet AG 63.8%, Warburg Pincus 21.2%, free float 15.0%. Warburg Pincus reduced its stake through 2024 and fully exited in March 2025 (via WP XII Venture Holdings II SCSp). Current shareholder structure (2025): United Internet AG approximately 64%; remainder free float. United Internet AG (Montabaur, ticker UTDI) is controlled by founder/CEO Ralph Dommermuth. European-control 'majority' reflects German parent + German operating entity + German Vorstand; no non-EU shareholder block of material size.

Headquarters

🇩🇪 Montabaur, Germany

IONOS SE

Subsidiaries
  • IONOS Inc. 🇺🇸 United StatesUS operating subsidiary at Two Logan Square, 100 North 18th Street, Suite 400, Philadelphia, PA 19103. Data controller for US-region customers per the US privacy policy. Operates the three US data centers in Las Vegas (LAS), Newark (NJ - NWK) and Lenexa (KS - LEN); accepts subpoenas at the Philadelphia HQ.
Data residency
DE
FR
GB
ES
US

Region selectable

Customer-selectable per deployment via the IONOS Cloud Data Center Designer. 10 cloud-IaaS data centers: Frankfurt 1 + Frankfurt 2 + Berlin (DE), Paris (FR), London + Worcester (GB), Logrono (ES), Las Vegas + Newark + Lenexa (US). Verbatim from cloud.ionos.com/protection: 'The customer's data is always stored in the data centers of their choice. IONOS Cloud does not move customer data to other locations without the customer's consent.' Hosting/email/shared product lines bring the total operated DC count to 29.

Hosting infrastructure

Website: Self-hosted on IONOS-owned infrastructure; Apache server (HTTP/2, HSTS max-age=31536000); geo-tag cookie DPX:us on .com vs DPX:de on .de surfaces edge tenancy split

Application: IONOS-owned data centers (29 operated) including 10 cloud-IaaS sites in DE/FR/GB/ES/US

Email: Legacy 1&1 mail infrastructure (mxint01.1and1.com, mxint02.1and1.com) for ionos.com inbound -- self-hosted corporate email, no Google Workspace or Microsoft 365 dependency

CDN: Self-hosted; no Cloudflare, Fastly or Akamai in front of ionos.com / ionos.de marketing sites

Subprocessors
NameCountryPurpose
XQueue GmbH🇩🇪 Germany(For Email Marketing) Newsletter delivery and tracking services per ionos.com/help/data-protection/data-processing-of-website-visitors-of-your-ionos-product/data-processing-by-email-marketing/
Snowplow Analytics Ltd🇬🇧 United Kingdom(For MyWebsite Creator 2017-2022) Tracking cookies based on Snowplow Analytics technology -- used exclusively to improve the product per ionos.com/help/data-protection/data-processing-of-website-visitors-of-your-ionos-product/data-processing-by-mywebsite-creator-2017-2022/
Usercentrics GmbH🇩🇪 Germany(For MyWebsite Creator 2017-2022) Consent Management Platform (CMP) obtaining cookie consent from website visitors; Munich-based per the Usercentrics legal notice

Subprocessor list

Certifications
iso-27001
Certified

ISO/IEC 27001 information security management system, listed on Frankfurt cloud DC cert page

c5
Certified

BSI C5 Type 1 issued November 2023 for Compute Engine, Cloud Cubes and S3 Object Storage. Achim Weiss quote: 'The C5 certificate and our certification in accordance with IT baseline protection prove that we fulfil the highest requirements in terms of data protection and IT security.'

bsi-it-grundschutz
Certified

BSI IT-Grundschutz certification, received September 2022. IONOS positions itself as 'the first German cloud provider to have both the C5 certificate and the BSI's IT-Grundschutz certification.'

pci-dss
Certified

PCI DSS, listed on Frankfurt cloud DCs cert page

isae-3402
Certified

ISAE 3402 / SSAE 16 attestation, listed on Frankfurt cloud DCs cert page

iso-9001
Certified

ISO 9001 quality management system, listed on Frankfurt cloud DCs cert page

iso-50001
Certified

ISO 50001 energy management system; IONOS uses 100% renewable energy in its German and UK data centers per ionos.com/environment.

US CLOUD Act exposure
Partial, via US subsidiaries
Open source
Closed source

Pricing

Web Hosting

From low single-digit EUR/month

annual
  • MyWebsite Now / MyWebsite Creator / WordPress hosting / Web Hosting plans
  • Domain name included on most plans
  • Hosted in IONOS-owned EU data centers (Frankfurt 1/2, Berlin) for EU customers
Cloud Compute

Pay-per-use, per-minute billing

per-minute
  • Customer-selectable region across 10 cloud data centers
  • Managed Kubernetes, S3 Object Storage, Cloud Cubes, Software-Defined Data Center
  • Free 30-day trial of the Cloud platform
Dedicated Servers (Bare Metal)

Monthly subscription

monthly
  • Full root access; AMD EPYC + Intel Xeon options
  • DDoS protection included
  • Hardware located in EU data centers by default
AI Model Hub

Per-token pricing

per-token, model-specific
  • Catalogue includes Meta Llama 3.1 8B/405B, Llama 3.3 70B, Mistral Nemo, Mistral Small 24B, gpt-oss-120b, LightOnOCR 2, FLUX.1 [schnell]
  • Multimodal platform with embedding, text generation, image generation
  • Hosted in IONOS Cloud data centers (Germany); GAIA-X badge
IONOS Nextcloud Workspace

From GBP 1/user/month intro (3 months)

monthly
  • Managed Nextcloud office alternative to Microsoft 365
  • Hosted exclusively in Germany
  • IONOS is the world's largest managed-service provider for Nextcloud

Official downloads

Questions & Answers

6 questions

Where is IONOS headquartered, and what is the parent / subsidiary structure?

The operating entity IONOS SE is registered at Elgendorfer Strasse 57, 56410 Montabaur, Germany (Amtsgericht Montabaur HRB 24498, VAT DE815563912). CEO Achim Weiss leads a seven-member Vorstand. The listed parent IONOS Group SE & Co. KGaA is on the Frankfurter Wertpapierboerse SDAX since 8 February 2023 (ticker IOS, ISIN DE000A3E00M1). United Internet AG (Montabaur; founder/CEO Ralph Dommermuth; ticker UTDI) is the controlling shareholder at approximately 64% after Warburg Pincus fully exited in March 2025. The US operating subsidiary is IONOS Inc., registered at Two Logan Square, 100 North 18th Street, Suite 400, Philadelphia, PA 19103, which serves US-region customers and operates the three US data centers in Las Vegas, Newark and Lenexa.

Is IONOS subject to the US CLOUD Act?

The parent and EU operating entity (IONOS SE) is German, sitting structurally outside CLOUD Act reach for workloads contracted with the German entity and hosted in EU data centers. The US sister entity IONOS Inc. is incorporated in the United States and subject to US law -- the US privacy policy explicitly states: 'Your use of the IONOS Inc. Services may result in the transfer of information internationally, including into or outside of the United States.' IONOS publishes a Subpoena Policy at ionos.com/terms-gtc/terms-policy-subpoena/ that commits to notifying customers and delaying civil-subpoena compliance for up to 10 days to allow customers to challenge. The IONOS Digital Guide states verbatim: 'Data stored on European servers is generally not subject to the US CLOUD Act or similar legislation that allows government access to stored information.'

Where will my data be stored on IONOS Cloud, and can I pin it to a specific region?

Yes. IONOS Cloud lists 10 cloud-IaaS data centers with customer-selectable region per deployment via the Data Center Designer: Frankfurt 1, Frankfurt 2, Berlin, Paris, London, Worcester, Logrono, Las Vegas (NV), Newark (NJ) and Lenexa (KS). Verbatim from cloud.ionos.com/protection: 'The customer's data is always stored in the data centers of their choice. IONOS Cloud does not move customer data to other locations without the customer's consent.' A third German cloud data center was announced in early 2025. The full IONOS group operates 29 data centers across hosting, email, shared and cloud product lines.

Where can I find IONOS's DPA and subprocessor list?

IONOS publishes subprocessor disclosures per product at ionos.com/help/data-protection/ rather than as a single consolidated list. Across the eight per-product processing pages, the third-party processors that are named are: Email Marketing -> XQueue GmbH (Germany) for newsletter delivery and tracking; MyWebsite Creator 2017-2022 -> Snowplow Analytics Ltd (United Kingdom) for product-improvement tracking cookies + Usercentrics GmbH (Germany, Munich) as the Consent Management Platform. The remaining product pages (Web Hosting, Online Store, MyWebsite Now, SiteAnalytics, MyWebsite 2008-2017, HIPAA) explicitly state 'data is not passed on to third parties' or reference only IONOS-internal modules such as SiteAnalytics. The DPA has been bundled into the IONOS GTC since 19 July 2022 -- per the help center: 'the agreement on data processing has been part of the IONOS GTC. No separate agreement is therefore necessary for new contracts from this date.' Existing customers can complete a DPA via Menu > My account > Data protection & privacy notice in the dashboard; a standalone DPA PDF is at ionos.co.uk/help/fileadmin/pdf/en_GB/Datenschutz/Customer_DPA_UK.pdf.

What certifications does IONOS hold?

BSI C5 Type 1 (November 2023) for Compute Engine, Cloud Cubes and S3 Object Storage; BSI IT-Grundschutz (September 2022) -- positioning IONOS as 'the first German cloud provider to have both the C5 certificate and the BSI's IT-Grundschutz certification.' Also ISO 27001 on the Frankfurt cloud DCs, ISO 9001, PCI-DSS, ISAE 3402 / SSAE 16, ISO 50001 (energy management). The company runs on 100% renewable energy in its German and UK data centers per the environment page. IONOS is a GAIA-X consortium member with leadership in 6 projects including Marispace-X (maritime data).

What does IONOS sell beyond hosting and domains?

Beyond Web Hosting and Domain registration, IONOS sells Cloud Compute (per-minute IaaS), Managed Kubernetes, S3-compatible Object Storage, Cloud Cubes, Software-Defined Data Center, Databases and Data Platform on its own cloud infrastructure. The AI Model Hub (launched 1 August 2024 as 'first German multimodal AI platform') hosts Meta Llama 3.1/3.3, Mistral Nemo, Mistral Small 24B, gpt-oss-120b, LightOnOCR 2, FLUX.1 [schnell] and embedding models on per-token pricing -- Achim Weiss frames the model selection as 'best open source AI models available on the market... prevents vendor lock-in.' IONOS Nextcloud Workspace is a sovereign Microsoft 365 alternative (managed exclusively in Germany; IONOS is the world's largest managed-service provider for Nextcloud). Reseller business covers Microsoft 365 and Google Workspace; DigiCert SSL; AI Receptionist; RankingCoach; Logo Generator.

Alternatives

Other European companies in the same category as IONOS.

Quick facts

Languages supported
Deutsch
English
Español
Français
Italiano
Polski
Português

Sources & verification

Every fact on this page is backed by a primary or independent source. Most recent verification: May 15, 2026.

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Citations

Profile content

Tagline
Description
Languages
  • primary · about-pagewww.ionos.comSite language selector across 7+ locales
Pricing
Features
Q&A
Integrations
  • primary · otherdocs.ionos.com/cloudCloud Compute API documentation
  • primary · about-pagewww.ionos.com/terms-gtcProduct portfolio: M365 reseller, Google Workspace reseller, DigiCert SSL, Domain registrar, AI Receptionist, RankingCoach, Logo Generator

Sovereignty (SHIELD)

SSubprocessors
HHeadquarters
HSubsidiaries
IData residency
IHosting infrastructure
  • primary · dns-recordswww.ionos.comAS8560 RIPE; ns-1and1.ui-dns.{de,biz,org,com}; mxint01/02.1and1.com
  • primary · http-headerswww.ionos.comApache HTTP/2, HSTS max-age=31536000; geo cookie DPX:us vs DPX:de
EUS CLOUD Act exposure
LLegal documents
DCertifications
DOpen source
  • primary · about-pagewww.ionos.comIONOS does not publish a flagship open-source program; AI Model Hub uses third-party open-source models (Llama, Mistral, gpt-oss) but is not itself open-source