Czechia is an open hosting market that competes almost entirely on the first year. On the confirmed-active .cz business book, hosting-relationship concentration — hosting competitors only, with CDN, SaaS-builder and DNS-infrastructure actors excluded — is an HHI of 1,047: about 9.6 effective owners of the customer relationship, and no single actor holds more than 22.1% of it. What is not open is the number a buyer can compare — every tracked Czech storefront advertises an introductory rate, and storefronts serving 45.3% of captured relationships publish what year two costs. The market word is webhosting.
“Concentration” is three different questions, and they have three different answers. Hosting-relationship HHI (1,047) measures economic market power — who owns the customer relationship — counting hosting competitors only. Hosting-infrastructure HHI (694) measures where the workloads actually run. Control-plane HHI (923) measures the combined ecosystem, and deliberately includes CDN, SaaS-builder and DNS-infrastructure actors alongside hosting groups.
Read as market power, Czechia runs on about 9.6 effective owners of the customer relationship; read as infrastructure, the same book spreads across about 14.4 effective hosting infrastructures — a 1.5× gap between who runs the servers and who holds the contract: the market is thinner at the contract than at the rack. Shares follow the same split: the top three owners hold 51.1% of customer relationships, while the top three infrastructures carry 35.9% of the workloads, and on the wider control plane — which also counts CDN, SaaS-builder and DNS actors — the top three come to 47.1%.
An entry price of €1.53/mo is a bid for the first transaction, not the cost of the service: all 6 tracked Czech storefronts acquire on teaser pricing, while storefronts serving 45.3% of captured relationships publish a renewal price. Czechia's openness is real — about 9.6 effective owners, none above 22.1% — and its advertised price still stops being true after twelve months.
All three readings are drawn from the confirmed-active .cz business book (634,995 classified domains) and are ownership-folded — a lower bound. Each reading is renormalised over its own actor set. How the bands and the three readings work.
Across the 215,193 confirmed-active Czech business sites we HTTP-enrich and fingerprint: 15.3% carry e-commerce tooling, 55.5% run analytics, and 3.0% sit on a detected website builder. Off the web layer, 10.3% of the full book runs modern hosted email.
Presence, not billing; the builder share is a floor. How technology detection works.
Of the 594,248 mail-carrying business domains, 61.6% publish SPF but only 29.7% do so with a spoof-rejecting hard fail. 34.3% publish DMARC — 2.4% with an enforcing p=reject, 23.1% monitoring-only p=none, both shares of the same mail-carrying book, so enforcement reaches 11.2% of it. Adoption is not enforcement. How to read email posture.
Across 6 tracked Czech storefronts, the median entry-tier price is €1.22/mo ex-VAT. Weight the same storefronts by how many businesses each platform actually serves and the price the average Czech customer meets is €1.53/mo — above the storefront median — the biggest platforms here price above the field.
— a floor, since storefronts that never disclose a renewal price sit in the denominator.
Fewer than five tracked Czech storefronts publish a measurable renewal price, so we do not state a measured market renewal cliff — a median over three storefronts would be an anecdote, not a statistic. Storefronts serving only 45.3% of captured Czech customer relationships publish a renewal price — most Czech customers genuinely cannot see year two before they commit.
The tracked set represents 67.5% of the Czech control-plane customer relationships. How prices are captured, normalised and suppressed.
Czech businesses search webhosting and domén, and the storefronts answer in Czech — registrace, služby, spolehlivý, zdarma. An English-only page competing on “hosting” arrives in a market that already has its own word for it.
Measured from Czech storefronts, sized by how many providers use each term.
The two terms buyers search most: webhosting / domén. How this is measured.
Every figure here is queryable through the HostingBrain connector, free tier. In Claude or any MCP-compatible assistant, this is the whole page in one prompt:
“Using HostingBrain, describe the Czechia 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.”
Ask the follow-up yourself. HostingBrain answers questions like this — with the date, denominator and caveats attached — inside Claude and any MCP-compatible assistant. Named provider shares and per-operator price ladders are on Pro.