Best IT Outsourcing Companies in the UK (2026): 10 Providers Reviewed

Outsourcing IT to a British provider gives a foreign company English-language support, a mature market of managed service providers and working hours that overlap with both Europe and North America. This ranking is written for a buyer from the US, the EU or the Nordics who is comparing IT outsourcing companies in the UK for managed cloud, security operations, networks or an outsourced service desk. I kept 10 firms, all incorporated and headquartered in the UK, and checked each one on Companies House.

IT outsourcing companies in the UK at a glance

If you only have a minute, these are the IT outsourcing companies in the UK I would shortlist as a foreign buyer, in the order I would contact them. Each is reviewed below, with its Companies House data on its company profile.

1. Claranet – Founder-led European managed services provider headquartered in London.
2. ANS – Manchester cloud MSP and Microsoft UK Services Partner of the Year 2024.
3. Node4 – Derby cloud, network and managed services provider with UK sovereign platforms.
4. Littlefish – UK managed service desk, cyber SOC and Microsoft cloud provider.
5. Kocho – Identity-first Microsoft security and managed IT specialist.
6. Wavenet – UK managed IT, cyber, cloud and communications provider.
7. Redcentric – AIM-listed UK managed service provider for regulated sectors.
8. iomart – Glasgow managed cloud provider with its own UK data centres.
9. Computacenter – London-listed technology sourcing and managed services group.
10. Softcat – FTSE 250 IT infrastructure, licensing and services provider.

How I ranked the IT outsourcing companies in the UK

I ranked the IT outsourcing companies in the UK by how much of their business is genuine managed services first, quality signals second and fit for a foreign client third:

• Managed services focus – providers that run IT for clients (cloud, SOC, NOC, service desk) rank above firms whose revenue comes mainly from reselling hardware and licences.
• Accreditations and partner status – for example Microsoft and AWS partner tiers, CREST and CHECK for security, ISO 27001 and UK government frameworks such as G-Cloud.
• Track record – named clients, years on the market and the scale of what they run.
• Reviews – none of these firms has usable reviews on Clutch or Google, which is normal for enterprise managed service providers, so I name the strongest other signal for each one.
• Financial health and ownership – where results are published, I looked at them, and I disclose who owns each firm.
• Registration – every firm is incorporated in the UK and has its headquarters there.

I left out the UK arms of foreign outsourcing groups such as TCS or Capgemini, and I did not list Six Degrees separately because Claranet bought it in June 2026. My rule is about where a firm is incorporated and headquartered, not who its shareholders are: Node4 is majority-owned by the US investor Providence Equity Partners and Wavenet by Australia’s Macquarie, and I say so in their reviews. Computacenter and Softcat are mostly resellers with services arms, so they sit at the bottom. Team sizes below are the firms’ own or published figures. If cost matters more than proximity, see the same list for Poland, where rates are lower.

The 10 best IT outsourcing companies in the UK, reviewed

Every IT outsourcing company in the UK below gets the same treatment: who they are, what the evidence says, the facts that matter when you hire, and my opinion on who should – and should not – work with them.

1. Claranet

Founder-led European managed services provider headquartered in London

Claranet is a London-headquartered managed IT services provider covering cloud, cybersecurity, workplace, networks and connectivity, and data and AI. It operates in the UK, France, Italy, Spain, Portugal, the Netherlands, Germany, Switzerland, the US, India and Brazil. In June 2026 it bought the UK managed service provider Six Degrees; according to Claranet and the trade press, the combined group has more than €650m in revenue and about 3,500 staff. It is still led by its founder, Charles Nasser, and Companies House shows no single controlling shareholder.

What clients say. I found no usable reviews on Clutch or Google. The strongest signals are its scale, its own operations in eleven countries and named clients such as Pets at Home, the Salvation Army Trading Company and the NHS.

Facts: founded 1996 · London · about 3,500 people · English.

My take: my first call if you want one managed service provider for the UK and continental Europe – but give the Six Degrees integration a few months to settle before you sign a long contract. Best for: mid-market and enterprise buyers who want one provider for cloud, security and networks across the UK and continental Europe. Not for: small offices that only need basic desktop support.

Visit claranet.com →Company profile & reviews →

2. ANS

Manchester cloud MSP and Microsoft UK Services Partner of the Year 2024

ANS is a Manchester-headquartered provider of managed cloud (Azure, AWS, private and sovereign cloud), security, data and AI, and Dynamics 365 and Business Central services. It cites Microsoft UK Services Partner of the Year 2024 and AWS MSP and Advanced Tier status. Since June 2021 it has been backed by the UK private equity firm Inflexion, which bought the founder’s majority stake and combined ANS with the Manchester hosting provider UKFast. CRN put its 2023 revenue at £129.9m and its headcount at 749 – press figures, not filed accounts.

What clients say. I found no usable reviews on Clutch or Google. Its Microsoft and AWS partner status and clients such as Costa, the Ministry of Defence, Euro Car Parts, Fenwick and Manchester City Council are the signals I would rely on.

Facts: founded 1996 · Manchester · about 750 people · English.

My take: the strongest Microsoft-and-AWS specialist here, and the one I would pick if you want managed cloud and Dynamics 365 from the same UK team. Best for: mid-market firms that want Azure or AWS managed cloud plus Microsoft business applications from one UK provider. Not for: buyers who need on-site support across continental Europe.

Visit ans.co.uk →Company profile & reviews →

3. Node4

Derby cloud, network and managed services provider with UK sovereign platforms

Node4 is a Derby-headquartered IT solutions provider offering cloud and AI platforms, networks and security, managed services and Microsoft Dynamics 365 ERP and CRM. It runs its own 24/7 SOC, NOC and service desk and UK sovereign platforms, and says it serves more than 1,700 businesses. It has grown through acquisitions including Starcom Technologies and TNP in 2021. Node4 was founded and is headquartered in the UK, but since March 2021 its majority investor has been the US private equity firm Providence Equity Partners.

What clients say. Its Clutch profile has no reviews, and its Clutch size band of 50–249 people looks low for a business of this reach. Named clients such as Stagecoach Group, the National Trust, Nuffield Health, Dunelm, Legal & General and East Midlands Railway are the stronger signal.

Facts: founded 2004 · Derby · $100–149/h · minimum project $5,000 · English.

My take: a solid one-stop provider for UK mid-market companies that want hosting, connectivity, security and Microsoft apps under one contract – just know that a US investor owns the majority. Best for: UK mid-market firms that want hosting, connectivity, security and Microsoft apps from one managed service provider. Not for: buyers outside the UK who need local delivery.

Visit node4.co.uk →Company profile & reviews →

4. Littlefish

UK managed service desk, cyber SOC and Microsoft cloud provider

Littlefish is a Nottingham-based managed IT services company that runs outsourced service desks, cyber defence from its own security operations centre, Microsoft 365 and cloud, and data and AI services. It works for public- and private-sector clients, says it supports more than one million service users and delivers its services from the UK. Its parent company is Source24 Limited, and its chairman Graham Gilbert, founder of ComputerLand UK, is described on its website as the primary shareholder.

What clients say. I found no usable reviews on Clutch or Google. Clients such as HM Treasury, National Gas, PureGym, PIB Group, the Canal & River Trust and Croydon Council are the strongest signal.

Facts: founded 2003 · Nottingham · English.

My take: the specialist I would hire to outsource a service desk and end-user support, with security monitoring delivered from the UK. Best for: organisations that want to outsource their service desk and end-user support, with a UK-delivered SOC. Not for: buyers who need heavy cloud engineering or software development.

Visit littlefish.co.uk →Company profile & reviews →

5. Kocho

Identity-first Microsoft security and managed IT specialist

Kocho is a UK Microsoft identity, security and cloud specialist that designs, secures and runs Microsoft environments. Its services include identity and access management, endpoints, cloud and AI, managed IT support, a managed SOC, penetration testing, Cyber Essentials and a virtual CISO. The brand launched in April 2022 from the merger of TiG Data Intelligence and ThirdSpace and later acquired Mobliciti; the legal entity behind it is much older. Its parent is Kocho Holdings Limited, and I could not identify the ultimate owner.

What clients say. I found no usable reviews on Clutch or Google, and I could not load its Companies House profile, although the company files full accounts. Clients such as Aviva, Bupa, EDF Energy, Primark, Kingfisher and UK Power Networks are the strongest signal.

Facts: founded 2022 · English.

My take: the pick for a Microsoft 365 and Entra estate where identity and security matter more than desktop support. Best for: enterprises on Microsoft 365 and Entra that want identity-led security and managed security operations. Not for: non-Microsoft environments or basic break-fix support.

Visit kocho.co.uk →Company profile & reviews →

6. Wavenet

UK managed IT, cyber, cloud and communications provider

Wavenet is a Solihull-headquartered provider of managed IT, cyber security (CHECK and CREST accredited), cloud and modern workplace, connectivity, unified communications and contact centre services. It has 15 UK support locations, about 1,500 staff and more than 22,000 customers, holds ISO 27001, ISO 9001 and Cyber Essentials Plus, and is on Crown Commercial Service frameworks including G-Cloud 14 and 15. It is UK-founded and UK-headquartered, but since May 2021 it has been majority-owned by the Australian group Macquarie (Macquarie Capital Principal Finance).

What clients say. I found no usable reviews on Clutch or Google. Clients such as Costain, NatWest Group, the DVLA, Transport for London, John Lewis & Partners and Greene King are the signal I would rely on.

Facts: founded 2000 · Solihull · about 1,500 people · English.

My take: the most practical choice for a multi-site UK organisation that wants IT, security, phones and connectivity from one supplier – its roots are in telecoms, and it shows. Best for: UK multi-site organisations that want IT, security and communications from one supplier. Not for: buyers who need delivery outside the UK.

Visit wavenet.co.uk →Company profile & reviews →

7. Redcentric

AIM-listed UK managed service provider for regulated sectors

Redcentric is a Harrogate-headquartered, AIM-listed UK managed service provider offering cloud (including UK sovereign cloud), networking over its own 100Gb/s national network, communications, cyber security and professional services, with 24/7 UK-based support. It focuses on regulated markets such as the NHS and the public sector. In 2026 it sold its data centre business to Stellanor Datacenters (completed on 30 April 2026) and returned £90m to shareholders through a tender offer in July 2026, so it is now a leaner managed services business.

What clients say. I found no usable reviews on Clutch or Google. Clients such as NHS England, Channel 4, Hays, Howdens, Addison Lee and Heathrow Airport are the strongest signal.

Facts: Harrogate · English.

My take: a good fit for healthcare and public-sector buyers who want network, cloud and security under one contract – ask how the business looks after the data centre sale before you commit. Best for: UK healthcare, public-sector and regulated organisations that need network, cloud and security under one contract. Not for: buyers who want their provider to own its data centres, or need delivery outside the UK.

Visit redcentricplc.com →Company profile & reviews →

8. iomart

Glasgow managed cloud provider with its own UK data centres

iomart is a Glasgow-headquartered, AIM-listed managed cloud provider offering cloud services, cyber security, data protection, modern work (Microsoft 365, managed devices, cloud desktops) and data centre hosting and colocation. It runs 12 of its own UK data centres and a dark-fibre network. Revenue rose to £154.9m in the year to March 2026, but it made a net loss for the second year running (£9.2m after £55.1m a year earlier), reported customer churn of 18% and net debt of £108.6m, about 4.2 times adjusted EBITDA. Its bank facility was extended to 2028 with amended covenants, it is searching for a new CEO and its CFO is leaving; the directors concluded there is no material uncertainty about it as a going concern.

What clients say. I found no usable reviews on Clutch or Google. Its owned UK data centre estate is the strongest signal; the named clients I found – CoreStream, PortmanDentex and Uniserve – are smaller than at most firms here.

Facts: founded 1998 · Glasgow · 600–650 people · English.

My take: the provider to look at if you want your data in UK-owned data centres – but read its latest results and agree exit terms before you sign a long contract. Best for: buyers who want UK-hosted private or hybrid cloud, backup and colocation in UK-owned data centres. Not for: risk-averse buyers who need a supplier with a strong balance sheet.

Visit iomart.com →Company profile, reviews & financials →

9. Computacenter

London-listed technology sourcing and managed services group

Computacenter is a Hatfield-headquartered, London-listed technology and services provider. It sources technology and provides professional services and managed services across workplace, cloud, data centre, networking and security for large corporates and public bodies, with operations in 23 countries across EMEA, the Americas and APAC. It reported 2025 revenue of £9.19bn and net profit of £157.1m, but most of that revenue is technology resale; services are the smaller share. Its founders, Philip Hulme and Sir Peter Ogden, still sit on the board.

What clients say. I found no usable reviews on Clutch or Google. Its published results, its reach in 23 countries and clients such as NHS Frimley, Salzgitter AG and HUK-COBURG are the strongest signals.

Facts: Hatfield · 20,000+ people · English.

My take: not a classic outsourcer – it is above all a reseller with a large services arm – but the obvious choice when you need devices, workplace support and managed infrastructure in many countries at once. Best for: large enterprises that need multi-country device supply, workplace services and managed infrastructure. Not for: SMEs and small projects.

Visit computacenter.com →Company profile, reviews & financials →

10. Softcat

FTSE 250 IT infrastructure, licensing and services provider

Softcat is a Marlow-headquartered, London-listed IT infrastructure and services provider for organisations in the UK and Ireland, covering hybrid cloud, workspace, cyber security, networking and data and AI, with country sites in Germany and Canada. It is vendor-agnostic, has more than 10,000 customers and over 250 service professionals, and reported revenue of £1.98bn and net profit of £150.3m for the year to July 2026. Most of that revenue comes from reselling hardware and software licences, so it is a weaker fit for full IT outsourcing than the managed service providers above.

What clients say. I found no usable reviews on Clutch or Google. Its published results and its base of more than 10,000 customers are the strongest signals; I found no named clients I could cite.

Facts: founded 1993 · Marlow · about 2,900 people · English.

My take: where I would buy licences, hardware and project services – not where I would hand over the day-to-day running of my IT. Best for: organisations with UK or Irish operations that want one partner for licensing, hardware and infrastructure services. Not for: buyers who mainly want fully outsourced IT operations or software development.

Visit softcat.com →Company profile, reviews & financials →

Quality, specialisation and what IT outsourcing companies in the UK charge

Almost none of the IT outsourcing companies in the UK in this ranking publishes prices. Managed services are quoted after an assessment of your estate, usually as a monthly fee per user, device or service, plus project work for migrations. The only rate I could find is on Node4’s Clutch profile, which lists $100–149 an hour and a minimum project of $5,000. Quality and fit come before price: moving away from the wrong provider after a three-year contract costs far more than the difference in monthly fees.

The main choice is between broad managed service providers such as Claranet, Node4 and Wavenet, Microsoft and cloud specialists such as ANS and Kocho, a service desk specialist (Littlefish), hosting-led providers with UK infrastructure such as Redcentric and iomart, and the large resellers Computacenter and Softcat, which suit procurement and multi-country rollouts more than day-to-day outsourcing.

Two practical points for foreign buyers. Prices are quoted in GBP, so agree whether you pay in pounds or in USD or EUR and who carries the exchange-rate risk on a multi-year contract. And since Brexit, B2B services supplied by a UK firm to a business outside the UK are normally invoiced without UK VAT, with you accounting for VAT at home under the reverse charge – confirm this with the provider and your own adviser.

How to choose an IT outsourcing company in the UK

Choosing an IT outsourcing company in the UK starts with what you actually want to hand over:

• Cloud across the UK and Europe – Claranet operates in eleven countries; ANS is the Azure and AWS specialist.
• Service desk and end-user support – Littlefish is built for this, with its own UK SOC.
• Microsoft identity and security – Kocho, for Microsoft 365 and Entra estates.
• Connectivity, phones and IT from one supplier – Wavenet or Node4.
• Regulated sectors and UK sovereign hosting – Redcentric for healthcare and the public sector, iomart for UK-owned data centres.
• Devices and licences in many countries – Computacenter, or Softcat for the UK and Ireland.

Also check the IT outsourcing company in the UK on Companies House (find-and-update.company-information.service.gov.uk): the register is free and shows the company number, status, directors, owners and filed accounts. Ask who owns the firm, what the exit and data-handover terms are, and when support is staffed. UK time (GMT, or BST in summer) overlaps the whole EU working day and US East Coast mornings, so many US buyers agree on a morning handover call and 24/7 cover for incidents.

IT outsourcing companies in the UK: FAQ

The questions foreign buyers ask most before hiring IT outsourcing companies in the UK.

My verdict: which IT outsourcing company in the UK to hire

Choosing among IT outsourcing companies in the UK depends on what you are handing over. For cloud and security across the UK and Europe, hire Claranet. For Microsoft and AWS managed cloud, hire ANS. For an outsourced service desk, hire Littlefish. For Microsoft identity and security, hire Kocho. For IT and communications across many UK sites, hire Wavenet or Node4. For regulated UK workloads, talk to Redcentric. For devices and licences in many countries, use Computacenter.

Whichever IT outsourcing company in the UK you choose, agree the exit terms, data handover and service levels before you sign – a managed services contract is easy to enter and slow to leave.

Written by Adrian DąbrowieckiSEO consultant and founder of Marketer Coffee in Wrocław. I write every ranking on this site myself. Disclosure: Marketer Coffee is my agency.Last updated 28 Oct 2026Changelog · Oct 2026: first version, 10 companies

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