Companies · category

Top IT Services Companies in the UK

872 IT service providers ranked by rating, review volume and listing quality.

IT services is the broadest label in this directory and covers, at different firms, entirely different work: managed infrastructure and helpdesk, project-based software delivery, cloud migration, security, procurement, or some combination sold as one relationship. Two providers under this heading may have almost nothing in common.

Because the label is wide, the useful filter is the engagement model rather than the capability list. Is this a retained relationship with a service-level agreement and a monthly cost, or project work quoted per piece? Who is accountable when something breaks at two in the morning, and what does the contract actually promise? A provider that answers those precisely is describing a real service; one that answers in capabilities is describing a brochure.

Want your company here?

Between them, the 600 best-ranked of these 872 IT service providers cover web development (569), web design (556), WordPress (459) and eCommerce (440). 597 of them have written a profile you can read before you get in touch.

TrustList ranks more than 850 IT services companies in the UK, ordered on client reviews and profile quality, never on payment. At the top right now: NetMonkeys Ltd, Pen Test Partners and Innovation Group Limited.

What to check before you shortlist a IT services company

Service levels and response times, in the contract
Security certifications that match your obligations
What is covered on site and what is remote
Exit terms: how you get your data and credentials back if you leave

Filter by fitbudget, engagement, size and more

Panaseer
Web Development · Web Design · iOS App
Panaseer is the first Continuous Controls Monitoring platform for enterprise security. We help stakeholders to make informed, risk-based security decisions.
Write a review
Green Cloud IT Ltd
Web Development · Web Design · iOS App
Green Cloud IT is a North Manchester-based company, providing IT Goods & Services & Support to small businesses, corporate organizations & Government Departments.
Write a review
Millgate
Web Development · Web Design · iOS App
Millgate delivers tech products, services, and solutions that actually work, based on 20+ years of experience and training.
Write a review
Tesl8
Web Development · Web Design · iOS App
Tesl8 seed your CRM capability with select experts, to help you deliver CRM platform strategies and technologies for the digital era, whilst developing your internal people along…
Write a review
Dotmatics
Web Development · Web Design · Software Development
Dotmatics is a leading global scientific informatics software and services provider, delivering solutions tailored to the modern, highly collaborative and mobile scientific…
Write a review
ubisend
Artificial Intelligence - AI · Web Development · Web Design
ubisend is the leading artificial intelligence solution developing company. We deliver intelligent, on-demand RPA, AI, and conversational solutions.
Write a review
Gamma
Web Development · Web Design · UI/UX Design
Gamma is a leading supplier of voice, data and mobile products and services in the UK.
Write a review
ECS Digital
Web Development · Web Design · iOS App
ECS is a UK digital transformation consultancy business. Founded in 2008 with over 750 employees globally, ECS has been helping clients in all industries, to transform their…
Write a review
TSI
Web Development · Web Design · UI/UX Design
TSI helps organizations of all sizes, across multiple sectors, keep their communications ahead of the curve. How? Well, it’s simple really.
Write a review
Arrow ECS
Web Development · Web Design · iOS App
Arrow ECS is a technology enablement company that brings innovative IT solutions to the market to solve complex business challenges.
Write a review
WDS Mobile
Web Development · Web Design · iOS App
We help millions of end customers get a flying start with their Mobile Experience every day.
Write a review
Karhoo
Web Development · Web Design · iOS App
Karhoo is a revolutionary ground transportation technology ecosystem designed to address the challenge of improving mobility in our crowded and polluted urban centers.
Write a review
Eagle Eye
Web Development · Web Design · iOS App
Eagle Eye is a leading SaaS marketing technology company that enables businesses to create a real-time connection to attract and retain customers, through digital promotion and…
Write a review
Upside Energy
Web Development · Web Design · iOS App
Award-winning cloud platform, using advanced algorithms and artificial intelligence to manage and monetize very large portfolios of diversified and distributed energy assets.
Write a review
Red Hat
Web Development · Web Design · Software Development
Red Hat is the world’s leading provider of enterprise open source solutions, using a community-powered approach to deliver high-performing Linux, cloud, container, and Kubernetes…
Write a review
Blocksmith
Web Development · Web Design · UI/UX Design
Blocksmith is a blockchain studio based in London! A spin-off of Whitesmith, a product studio established in 2012, and supported by KR1, Europe's leading public crypto investment…
Write a review
Whitesmith
Mobile App Development · Web Development · Web Design
We are a Digital Product and Innovation Studio – we help you build a product that people will love to use and that will create new possibilities for your business.
Write a review
CyLon
Web Development · Web Design · iOS App
At CyLon, we find, grow and invest in the world's best emerging cyber businesses. Our global platform focuses exclusively on growing cybersecurity businesses.
Write a review
Countly
Web Development · Web Design · iOS App
Countly is a web and mobile app analytics platform. It collects data from mobile applications, processes this data in real-time and gives you advanced tools to understand your…
Write a review
Wake Trade Technologies Ltd
Artificial Intelligence - AI · Software Development · E-Commerce Development
We are a technology-based company using a combination of systematic processes to advise investors across asset classes.
Write a review
DocuSign
Software Development · Automation Engineer · eCommerce
Since its inception in 2003, DocuSign has been on a mission to accelerate business and simplify life for companies and people around the world.
Write a review
RCH Solutions
Artificial Intelligence - AI · Web Development · Software Development
RCH Solutions (RCH) is a global provider of computational science expertise, helping Life Sciences and Healthcare companies of all sizes clear the path to discovery.
Write a review
Rosslyn Data Technologies
Web Development · Web Design · Data Analytics
Rosslyn Data Technologies (AIM: RDT), aka Rosslyn Analytics, helps organizations create new business value from previously inaccessible data.
Write a review
Socitm
Web Development · Web Design · UI/UX Design
Socitm is the professional network for digital leaders in the transformation of local public services.
Write a review

For vendors

Want to see your company here?

The order is earned: ratings, verified reviews and listing quality decide it, and nobody can pay to move up. There are two ways to stand out, and each one says what it is.

Not on TrustList yet? Add your company or claim its listing, free.

Get vetted

Free

We check your registration, your website and your clients
Approved listings show the Verified badge here and on their profile
It earns a rank number and counts towards the TrustList Score; renewed yearly

Apply for vetting How vetting works

Sponsor the IT Services ranking

Paid · always labelled

A Sponsored card above the IT Services ranked list
Marked Sponsored, and it never changes the order
Booked by the month; cancel any time

Book a spot See prices

How many IT services companies are there in the UK?

872 companies on TrustList offer IT services and are based in the UK. That makes the UK the largest IT services market we rank.

How is this ranking worked out?

Each firm's position comes from its client reviews and its profile, blended into one score:

Rating, smoothed so a single five-star review cannot outrank a firm with hundreds of good ones
Review volume, with diminishing returns
Profile completeness: the details a buyer needs to judge the firm
Earned trust: verification and awards, as a small lift

No firm can pay for a position. Sponsored listings are labelled and shown apart from this list. How rankings work

What else do firms in the UK offer?

We also rank web development (1,531), web design (1,385) and software development (443) in the UK.

Same subject

More it service providers rankings

Every other way we rank it service providers — by what they do and where they are.

All 284 rankings

Articles

More categories

Jump to another ranked category.

All categories

Keep exploring

More on TrustList

Everything here links back to the same verified catalogue. Pick your next stop.

Top IT Services Companies in the UK

Panaseer

Green Cloud IT Ltd

Millgate

Tesl8

Dotmatics

ubisend

Gamma

ECS Digital

TSI

Arrow ECS

WDS Mobile

Karhoo

Eagle Eye

Upside Energy

Red Hat

Blocksmith

Whitesmith

CyLon

Countly

Wake Trade Technologies Ltd

DocuSign

RCH Solutions

Rosslyn Data Technologies

Socitm

Want to see your company here?

Get vetted

Sponsor the IT Services ranking

How many IT services companies are there in the UK?

How is this ranking worked out?

What else do firms in the UK offer?

IT Services in other countries

Other services in the UK

More it service providers rankings

Related reading

Startup funding in the UK: the 2026 guide for founders

Helpfeel says Gyazo breach exposed 23.62 million user records and screenshot text

Cisco ISE flaw CVE-2026-76460 is being exploited, scores 10 and has no workaround

More categories

More on TrustList