The United Kingdom is where hosting stops being only hosting. On the confirmed-active .uk business book, hosting-relationship concentration — hosting competitors only, with CDN, SaaS-builder and DNS-infrastructure actors excluded — is an HHI of 1,475, about 6.8 effective owners of the customer relationship. Count the wider control plane — hosting groups plus the CDN, website-builder and DNS platforms — and the field looks 1.4× more plural than the hosting competition alone: the widest such wedge of the markets we publish, and it is made of platforms sitting between the business and its host.
“Concentration” is three different questions, and they have three different answers. Hosting-relationship HHI (1,475) measures economic market power — who owns the customer relationship — counting hosting competitors only. Hosting-infrastructure HHI (1,131) measures where the workloads actually run. Control-plane HHI (1,092) measures the combined ecosystem, and deliberately includes CDN, SaaS-builder and DNS-infrastructure actors alongside hosting groups. For a market-power reading — who can raise prices — the first is the one that counts, and it is the number this page leads with.
Read as market power, the United Kingdom runs on about 6.8 effective owners of the customer relationship; read as infrastructure, the same book spreads across about 8.8 effective hosting infrastructures — a 1.3× gap between who runs the servers and who holds the contract: the market is thinner at the contract than at the rack. The share readings sit close together here: the top three owners hold 49.8% of customer relationships, while the top three infrastructures carry 48.3% of the workloads, and on the wider control plane — which also counts CDN, SaaS-builder and DNS actors — the top three come to 50.1%. Three denominators, three numbers; quoting one against another is the error these pages are built to avoid.
Website-builder software is detected on 17.5% of enriched British sites — about four times the median of the other markets we publish — and 5 ownership groups hold page-one positions on the head search term. Customer control here is being redistributed across hosting groups, builder platforms and infrastructure providers at once — which is why the answer to “who owns this market” depends more than usual on which layer you ask about.
All three readings are drawn from the confirmed-active .uk business book (3,036,677 classified domains) and are ownership-folded, which makes them a lower bound. They do not share one base: only the control-plane reading is measured on that full figure, while the infrastructure and relationship readings are each renormalised over their own actor set, so their shares must never be read against it. How the bands and the three readings work.
Across the 767,952 confirmed-active British business sites we HTTP-enrich and fingerprint: 25.1% carry e-commerce tooling, 40.1% run analytics, and 17.5% sit on a detected website builder. Off the web layer, 26.6% of the full book runs modern hosted email.
Presence, not billing; the builder share is a floor. How technology detection works.
Of the 2,741,574 mail-carrying business domains, 77.2% publish SPF but only 30.9% do so with a spoof-rejecting hard fail; 39.3% publish DMARC, of which 5.9% enforce with p=reject and 25.9% publish monitoring-only p=none. Adoption is not enforcement — the gap between publishing a record and actually rejecting forged mail is where the risk lives.
We track 5 British storefronts, together representing 25.1% of this market's customer relationships — too little to state a market entry price or a market renewal cliff, so this page states neither. What the captured set does show: storefronts serving 50.5% of those relationships publish a renewal price, and 3 of the 5 acquire on teaser pricing. A market price for the United Kingdom follows when coverage does.
Why we would rather publish the gap than a thin median: how prices are captured, normalised and suppressed.
The British market searches in English, so the words themselves — web hosting, domain names — carry none of the local-language advantage they do elsewhere in Europe. The contest is not vocabulary but position: 5 ownership groups hold page-one listings on the head term.
Measured from British storefronts, sized by how many providers use each term.
The two terms buyers search most: web hosting / domain names. How this is measured.
Every figure here is queryable through the HostingBrain connector. In Claude or any MCP-compatible assistant, this is the whole page in one prompt:
“Using HostingBrain, describe the United Kingdom hosting market: how concentrated is it — give me the actor-pure hosting-relationship HHI and effective owners for market power, and the hosting-infrastructure and control-plane readings beside it, ownership-folded — how large is the confirmed-active business book, what do businesses run (CMS / e-commerce / builder adoption), what does entry shared hosting cost and how steep are renewal cliffs, and what is the SPF/DMARC posture? Keep it aggregate-level.”
Resolves to market_concentration, market_digitization,
technology_adoption, market_pricing and
email_security (all free tier). See definitions('hhi').
Reproduce this analysis: market_concentration,
market_digitization, technology_adoption, market_pricing and
email_security return every figure above for the United Kingdom and every other European market — on
the free tier. Named provider shares and price ladders: market_structure,
pricing_profile (Pro).
Ask the follow-up yourself. HostingBrain answers questions like this — with the date, denominator and caveats attached — inside Claude and any MCP-compatible assistant.