ionos.com

Hosting provider part of United internet

Europe's largest hosting provider, flagship brand of Germany's United Internet group.

🌐 ionos.com📍 Montabaur, DE📅 Founded 1988🔒 Public (XETRA: IOS; United Internet)🎛 Plesk

hostingregistrarcloud

10.7M

Domains · #5

2.57%

Market share

−0.1%

30-day growth

−6K

Domains · 30d

Plesk

Control panel

Domain flow 30 days · DNS

+28K

Gained

−52K

Lost

−23K

Net

Where clients come from · top sources

cloudflare.com+4K

godaddy.com+3K

sedo.com+2K

wix.com+1K

strato.de+806

Where domains go · top destinations

cloudflare.com−16K

godaddy.com−4K

sedo.com−3K

nicsell.com−3K

hostinger.com−2K

Geographic footprint top markets

🇩🇪Germany29%

🇬🇧United Kingdom8%

🇫🇷France4%

🇪🇸Spain3%

🇪🇺European Union2%

🇦🇹Austria0%

🌐Rest of world49%

Top TLDs by domains

.com32%

.de29%

.co.uk6%

.fr4%

.org4%

.net3%

Infrastructure footprint measured by webhosting.today · 2026-09-02

99.9%

On own network

17.5%

Mail self-hosted

129

Median days tracked

Where client domains actually run · top networks by domains

IONOS-AS This is the joint network for IONOS, Fasthosts, Arsys, 1&1 Mail and Media and 1&1 Telecom. Formerly known as 1&1 Internet SE., DE own83.7%

CLOUDFLARENET - Cloudflare, Inc., US2.9%

SEDO-AS, DE1.5%

AMAZON-02 - Amazon.com, Inc., US1.4%

HETZNER-AS - Hetzner Online GmbH, DE1.3%

Server locations

🇩🇪Germany65%

🇺🇸United States17%

🇬🇧United Kingdom10%

🇪🇸Spain8%

Corporate timeline funding · M&A · milestones

2023-02-08

IPO

IPO on Frankfurt Stock Exchange (Prime Standard), ticker IOS; final offer price EUR 18.50 per share; offering of existing shares held by United Internet and Warburg Pincus, United Internet retained majority source

2018

Acquisition ProfitBricks

1&1 merged with cloud infrastructure company ProfitBricks (founded by Achim Weiss); combined entity rebranded 1&1 IONOS source

1988

Founded

1&1 Internet established in Germany in 1988; rebranded as 1&1 IONOS in 2018 source

Investment Warburg Pincus

Warburg Pincus held 24.9% of IONOS Group SE (United Internet 75.1%) prior to the 2023 IPO; both sold existing shares in the offering source

Signals & news latest

11 Sep

IONOS Is Cutting 12% of Its Workforce Five Weeks After Raising Its Revenue Outlook.

1 Sep

DigitalOcean’s Market Cap Is Now Higher Than GoDaddy’s. What Five Public Multiples Say About Hosting Valuations.

29 Jul

The Renewal Multiplier Index: What Hosting Costs After the Intro Price

13 Jul

The Balance Sheet Behind Your Renewal Invoice: Who Owns the Hosting Industry, and What It Owes

6 Jul

Half a Billion Dollars to Shrink: What Public Filings Say a Hosting Customer Costs in 2026

Company details

Founded1988

HeadquartersMontabaur, DE

TypePublic (XETRA: IOS; United Internet)

Control panelPlesk

Total domains10.7M

Market rank#5

Leadership

Achim Weiss

CEO of IONOS (since October 2018); founder of ProfitBricks (2010)

Jens-Christian Reich

Chief Commercial Officer and Deputy Chairman (since July 2023)

Patrik Heider

CFO (since January 2026; previously CEO of NFON AG)

Company facts

Legal formSocietas EuropaeaWikidata · 2026-08

CityMontabaurWikidata · 2026-08

ISINDE000A3E00M1Wikidata · 2026-08

Domain registered2000-02-29RDAP · 2026-07

IndexSDAXWikidata · 2026-08

ParentUnited InternetWikidata · 2026-08

OwnerUnited InternetWikidata · 2026-08

CEOAchim WeißWikidata · 2026-08

Member ofFederal Association of the German Security and Defence Industry, eco - Association of the Internet Industry, Gaia-X, Open Source Business AllianceWikidata · 2026-08

Industryservice on InternetWikidata · 2026-08

Network & infrastructure

Own networkAS8560 · IONOS-ASour analysis · 2026-07

IPv4 addresses457472RIR · 2026-08

Networks (ASNs)3RIR · 2026-08

Datacenters19PeeringDB · 2026-07

Traffic level1-5TbpsPeeringDB · 2026-07

Network scopeGlobalPeeringDB · 2026-07

Peering policyOpenPeeringDB · 2026-07

IPv6 readyYesPeeringDB · 2026-07

ASN allocated1997-11-26RIR · 2026-08

DC countries🇺🇸 🇬🇧 🇩🇪 🇦🇹 🇫🇷 🇪🇸 🇵🇱

PeeringDBnet/262

Trust & reputation

Trustpilot★ 4.6 (43,938 reviews)

ISO 27001

On the web

X / Twitter

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About this data

How it is collected. Market Insights is built entirely from publicly observable data: domains seen across the internet and the DNS servers that answer for them. We attribute each domain to a provider based on the DNS infrastructure serving it, and aggregate those signals into the figures shown here.

Why it can differ from reality. This is an automated estimate, not an official registry. A provider’s real footprint can be higher or lower than shown, especially when it does not use its own DNS servers to host customer domains (for example, when those domains sit on a registrar’s, reseller’s or third-party cloud DNS). Coverage, timing and DNS configuration all affect what we can see.

The tool is neutral and provided “as is”. The same automated method is applied to every provider, with no manual ranking, no favoritism and no paid placement. These figures are published for informational purposes only, without any warranty of accuracy or completeness, and we accept no liability for any discrepancies or for decisions made based on this data.

Think a company is under-counted? We’d genuinely like to fix it. Send us your domain list or report your DNS servers, and we’ll review the attribution.