88 operators · 199 facilities · 2,641 MW tracked
Data center companies in United Kingdom
88 operators run 199 tracked data centers in United Kingdom: 186 operational, 13 under construction or announced, 2,641+ MW of published IT capacity. Built from operator and registry sources — a shortlist of the market, not an exhaustive census.
How many data center companies operate in United Kingdom?
Coloprice tracks 88 data center operators with 199 facilities in United Kingdom. The largest by facility count is Pulsant (14 facilities); by published IT capacity it is CX Tech with 1,000 MW disclosed. Counts reflect the Coloprice catalog as of 2026-10-01.
Largest by tracked facilities
- Pulsant 14 facilities
- Digital Realty 13 facilities
- Equinix 13 facilities
- iomart 8 facilities
- Stellanor 8 facilities
Largest by published capacity
- CX Tech 1,000 MW published
- Ada Infrastructure 210 MW published
- Colt DCS 204 MW published
- VIRTUS Data Centres 192 MW published
- CyrusOne 158 MW published
Operators in United Kingdom
Sorted by tracked facilities, then published capacity. MW is the sum of capacity each operator publishes for its United Kingdom sites — undisclosed values are not estimated.
| Operator | Facilities | Published MW | Cities | Status | Certifications | AI-ready |
|---|---|---|---|---|---|---|
| Pulsant | 14 | 22 | Edinburgh, Newcastle, Reading, Milton Keynes +6 | 14 live · 0 pipeline | not published | — |
| Digital Realty | 13 | not published | London, Woking, Crawley, Chessington +2 | 13 live · 0 pipeline | ISO 27001, SOC 2, ISO 14001 | — |
| Equinix | 13 | not published | London, Slough, Manchester, Swinton | 13 live · 0 pipeline | Climate Neutral Data Centre Pact, Cyber Essentials, ISO 14001 | 1 |
| iomart | 8 | 11 MW (1 of 8 sites) | London, Maidenhead, Glasgow (Chapelhall), Nottingham +3 | 8 live · 0 pipeline | Cyber Essentials Plus, ISO 22301, ISO 27001 | — |
| Stellanor | 8 | 5 MW (1 of 8 sites) | London, West Byfleet, Woking, Crawley +1 | 8 live · 0 pipeline | not published | — |
| Colt DCS | 6 | 204 MW (5 of 6 sites) | London, Welwyn Garden City | 4 live · 2 pipeline | not published | 2 |
| CyrusOne | 6 | 158 | Slough, West Drayton, Iver Heath | 5 live · 1 pipeline | ISO 14001 | — |
| Ark Data Centres | 6 | 99 MW (1 of 6 sites) | Corsham, Farnborough, Chertsey, London | 4 live · 2 pipeline | Cyber Essentials Plus, ISO 14001, ISO 22301 | 3 |
| NTT Global Data Centers | 6 | 85 MW (5 of 6 sites) | London, Hemel Hempstead, Slough | 6 live · 0 pipeline | not published | — |
| Telehouse | 5 | 18 MW (1 of 5 sites) | London | 5 live · 0 pipeline | ISO 14001, ISO 27001, ISO 9001 | — |
| VIRTUS Data Centres | 4 | 192 | London, Slough | 4 live · 0 pipeline | BREEAM Good, Uptime Tier III | — |
| Iron Mountain | 4 | 61 MW (3 of 4 sites) | London, Slough | 3 live · 1 pipeline | HITRUST, ISO 14001, ISO 22301 | — |
| Yondr Group | 3 | 100 | Slough | 2 live · 1 pipeline | not published | — |
| Vantage Data Centers | 3 | 75 MW (2 of 3 sites) | Cardiff, London | 3 live · 0 pipeline | BREEAM Excellent, ISAE 3402, ISO 14001 | 1 |
| Kao Data | 3 | 71 | Harlow, Slough, Stockport | 2 live · 1 pipeline | BREEAM Excellent, NVIDIA DGX-Ready, OCP-Ready | 2 |
| (aq) networks | 3 | not published | Leeds | 3 live · 0 pipeline | not published | — |
| ANS Group | 3 | not published | Manchester | 3 live · 0 pipeline | not published | — |
| Global Switch | 3 | not published | London | 2 live · 1 pipeline | not published | — |
| Keppel DC REIT | 3 | not published | Bracknell, London, Cardiff | 3 live · 0 pipeline | not published | — |
| nLighten | 3 | not published | Birmingham, Milton Keynes, Hoddesdon | 3 live · 0 pipeline | ISO 27001, Uptime Institute Tier III Certification of Design Documents | — |
| Node4 | 3 | not published | Derby, Leeds, Northampton | 3 live · 0 pipeline | ISO 27001 accredited, PCI compliant | — |
| Vocalink | 3 | not published | Harrogate, Dunstable, Debden | 3 live · 0 pipeline | Uptime Institute Tier III Certification of Design Documents Tier III Certification of Constructed Facility | — |
| Pure Data Centres Group | 2 | 90 | London | 1 live · 1 pipeline | Platinum Zero Waste to Landfill Certification | — |
| Custodian Data Centres | 2 | 10 MW (1 of 2 sites) | Dartford, Maidstone | 2 live · 0 pipeline | ISO 27001 | — |
| Templus | 2 | 7 | Leeds, London | 2 live · 0 pipeline | Tier III Ready (per operator) | — |
| brightsolid | 2 | not published | Aberdeen, Dundee | 2 live · 0 pipeline | ISO 22301, ISO 27001, ISO 9001 | — |
| China Mobile International | 2 | not published | Slough, London | 2 live · 0 pipeline | Uptime Institute Tier III Certification of Design Documents Tier III Certification of Constructed Facility Tier III Silver Certification of Operational Sustainability | — |
| Exascale | 2 | not published | Telford, Wolverhampton | 2 live · 0 pipeline | not published | — |
| Imerja | 2 | not published | Borehamwood, Bolton | 2 live · 0 pipeline | not published | — |
| Melbourne Server Hosting | 2 | not published | Manchester | 2 live · 0 pipeline | not published | — |
| The Bunker Secure Hosting | 2 | not published | Sandwich, Thatcham | 2 live · 0 pipeline | not published | — |
| VeloxServ Communications | 2 | not published | Wolverhampton, Redditch | 2 live · 0 pipeline | not published | — |
| CX Tech | 1 | 1,000 | Annan (Chapelcross) | 0 live · 1 pipeline | not published | — |
| Ada Infrastructure | 1 | 210 | London | 0 live · 1 pipeline | not published | 1 |
| Nscale | 1 | 90 | Loughton, Essex | 1 live · 0 pipeline | not published | 1 |
| Pure Data Centres Group / SEGRO (JV) | 1 | 72 | London | 0 live · 1 pipeline | not published | 1 |
| DataVita | 1 | 24 | Glasgow (Chapelhall) | 1 live · 0 pipeline | Uptime Institute Tier III Certification of Constructed Facility, Uptime Institute Tier III Certification of Design Documents | — |
| Csquare | 1 | 15 | Reading | 1 live · 0 pipeline | ISO 27001, NIST 800-53 PE High, PCI-DSS | 1 |
| Serverfarm | 1 | 11 | London | 1 live · 0 pipeline | not published | 1 |
| Aptum Technologies | 1 | 10 | Havant | 1 live · 0 pipeline | ISO 27001, PCI-DSS v3.2.1, SOC 2 | — |
| DataBank | 1 | 4 | London | 1 live · 0 pipeline | not published | — |
| 186k | 1 | not published | Leeds | 1 live · 0 pipeline | not published | — |
| AIMES | 1 | not published | Liverpool | 1 live · 0 pipeline | not published | — |
| Arelion | 1 | not published | London | 1 live · 0 pipeline | not published | — |
| ASK4 | 1 | not published | Sheffield | 1 live · 0 pipeline | not published | — |
| AtlasEdge | 1 | not published | Salford | 1 live · 0 pipeline | ISO 14001, ISO 27001 | — |
| Bytemark | 1 | not published | York | 1 live · 0 pipeline | not published | — |
| C.C.S. (Leeds) | 1 | not published | Leeds | 1 live · 0 pipeline | not published | — |
| Cable & Wireless UK | 1 | not published | Birmingham | 1 live · 0 pipeline | Uptime Institute Tier III Certification of Design Documents Tier III Certification of Constructed Facility | — |
| Centersquare | 1 | not published | Wokingham | 1 live · 0 pipeline | not published | — |
| ChunkyChips.net | 1 | not published | Basildon | 1 live · 0 pipeline | not published | — |
| Cloud Innovation | 1 | not published | Poole | 1 live · 0 pipeline | not published | — |
| Cogent Communications | 1 | not published | London | 1 live · 0 pipeline | not published | — |
| CustodianDC | 1 | not published | Maidstone | 1 live · 0 pipeline | not published | — |
| Docklands Data Centre | 1 | not published | London | 1 live · 0 pipeline | not published | — |
| DSM (GB) | 1 | not published | Peterborough | 1 live · 0 pipeline | not published | — |
| Epsilon | 1 | not published | London | 1 live · 0 pipeline | not published | — |
| European Data Centre | 1 | not published | Edinburgh | 1 live · 0 pipeline | ANSI/TIA-942-B Facility - Rated 2 | — |
| Fastnet | 1 | not published | Brighton | 1 live · 0 pipeline | not published | — |
| Fujitsu | 1 | not published | London | 1 live · 0 pipeline | Uptime Institute Tier III Certification of Constructed Facility Tier III Certification of Design Documents Tier III Gold Certification of Operational Sustainability | — |
| Galaxy Data Centers | 1 | not published | Redhill | 1 live · 0 pipeline | not published | — |
| Grid Hosting | 1 | not published | Derby | 1 live · 0 pipeline | not published | — |
| High Availability Hosting | 1 | not published | Sheffield | 1 live · 0 pipeline | not published | — |
| Indectron | 1 | not published | Gloucester | 1 live · 0 pipeline | not published | — |
| IONOS | 1 | not published | Worcester | 1 live · 0 pipeline | Uptime Institute Tier IV Certification of Constructed Facility | — |
| IP House | 1 | not published | London | 1 live · 0 pipeline | not published | — |
| Legend Communications | 1 | not published | Bradford | 1 live · 0 pipeline | not published | — |
| Legend Telecom | 1 | not published | Bradford | 1 live · 0 pipeline | not published | — |
| Lunar Digital Solutions Ltd | 1 | not published | Manchester | 1 live · 0 pipeline | not published | — |
| MAINFRAME & CYBERNETIC SYSTEMS | 1 | not published | Bournemouth | 1 live · 0 pipeline | not published | — |
| Neos Networks | 1 | not published | Hampshire | 1 live · 0 pipeline | not published | — |
| Netwise Hosting | 1 | not published | Canning Town | 1 live · 0 pipeline | not published | — |
| Next Generation Data | 1 | not published | Newport | 1 live · 0 pipeline | not published | — |
| NXLayer | 1 | not published | Reading | 1 live · 0 pipeline | not published | — |
| Options Technology | 1 | not published | London | 1 live · 0 pipeline | not published | — |
| OVHcloud | 1 | not published | London | 1 live · 0 pipeline | not published | — |
| Prescient Data Centres Northern Ireland | 1 | not published | Coleraine | 1 live · 0 pipeline | not published | — |
| Rackspace | 1 | not published | Slough | 1 live · 0 pipeline | not published | — |
| Redcentric | 1 | not published | Woking | 1 live · 0 pipeline | not published | — |
| ServerChoice | 1 | not published | Stevenage | 1 live · 0 pipeline | not published | — |
| Six Degrees | 1 | not published | Studley | 1 live · 0 pipeline | not published | — |
| Stellium Datacentres | 1 | not published | Newcastle | 1 live · 0 pipeline | not published | — |
| Teledata UK | 1 | not published | Manchester | 1 live · 0 pipeline | not published | — |
| Telstra | 1 | not published | London | 1 live · 0 pipeline | not published | — |
| The UK Grid Network | 1 | not published | Manchester | 1 live · 0 pipeline | not published | — |
| UK Dedicated Servers | 1 | not published | Coventry | 1 live · 0 pipeline | not published | — |
| Volta Data Centres | 1 | not published | London | 1 live · 0 pipeline | ISO 14001, ISO 9001, ISO/IEC 27001 | — |
| Wildcard Networks | 1 | not published | Newcastle upon Tyne | 1 live · 0 pipeline | not published | — |
AI-ready operators in United Kingdom
10 of 88 operators mark at least one United Kingdom facility as AI-ready (published liquid cooling or high-density design): Equinix, Colt DCS, Ark Data Centres, Vantage Data Centers, Kao Data, Ada Infrastructure, Nscale, Pure Data Centres Group / SEGRO (JV), Csquare, Serverfarm.
See also
Weekly digest: prices, capacity and deals in one email.
FAQ
Which is the largest data center company in United Kingdom?
By tracked facilities: Pulsant with 14 sites. By published capacity: CX Tech with 1,000 MW. Facility counts and MW come from operator pages and registries; published megawatts describe site design, not vacant capacity for a new order.
Do all of these companies sell colocation in United Kingdom?
No. The list includes colocation and wholesale operators as well as hyperscaler- or enterprise-owned sites that do not sell space. Open each facility card for status, certifications and the operator's own page before requesting a quote.
How is this list of United Kingdom data center companies built?
From the Coloprice catalog: every facility is recorded from a primary source (operator website, press release, certification registry), so a company appears here when at least one of its United Kingdom sites is tracked. No operator pays for placement, and the ranking is not for sale.
Get quotes from data center companies in United Kingdom
Send one requirement brief and we route it to operators with matching capacity in United Kingdom. Independent — no operator pays for position.
Need capacity in United Kingdom? One brief, several quotes.
Request quotes →