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Top IT Service Providers for .NET in the UK

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

Between them, the 457 IT service providers on this page cover web development (450), PHP (384), web design (365) and IT services (331). They also list work in United States of America. 457 of them have written a profile you can read before you get in touch.

We list more than 450 IT service providers in the UK listed for .NET development. The order comes from what each firm publishes and what has been verified about it, never from payment — at the top right now: Your Dev Team, Abbacus Technologies and Digijuice.

Before you shortlist, check

Work on current .NET versions, not only legacy .NET Framework
A plan for moving any old .NET Framework code forward
Automated tests and deployment you can run yourself
That you own the code and the build pipeline

Filter by fitbudget, engagement, size and more

Chrysalis Technology
Mobile App Development · Search Engine Optimization · Web Development
Chrysalis Technology is a company born not just out of ambition, passion, and success; it’s a company born from a desire to succeed, to deliver and to help customers maximize the…
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Syntax Integration Limited
Web Development · Web Design · IT Services
Syntax Integration has over 25 years of experience providing IT support and services in London.
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Matsco Solutions
Web Development · Web Design · IT Services
Matsco Solutions is a leading global managed IT service provider focused on the financial services industry.
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Entegraty
Web Development · Web Design · IT Services
At Entegraty we take the time to get to know our clients – from their objectives and the challenges they face to their industries and competitors – so that we can consistently…
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Claranet
Web Development · Web Design · IT Services
Founded in 1996, Claranet is one of Europe's leading managed IT services providers. We offer business hosting, networks, and communications services.
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5NINES Global
Web Development · Web Design · IT Services
The world's leading privately held global data centre colocation and development company 5NINES provides smart data centre colocation and wholesale service from its global data…
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Pure Data Centres Group
Web Development · Web Design · IT Services
The Pure Data Centres Group designs build and operate ‘best of breed’ data centres for demanding customers across Africa and the Middle East, with additional operations planned for…
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Colt Technology Services
Web Development · Web Design · IT Services
Colt provides high bandwidth services for enterprises and wholesale customers in Europe, Asia, and North America’s largest business hubs.
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Cloud Optics Limited
Web Development · Web Design · IT Services
Cloud Optics equip you with the confidence and strategy to reverse the balance of power when engaging with IBM, Microsoft, Oracle & SAP.
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QUANTIQ
Web Development · Web Design · IT Services
QUANTIQ is the only Microsoft Partner in the UK that has the ability to sell, implement and support Dynamics 365, Business Central, AX, CRM, GP, NAV and Business Intelligence…
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Qubitsoft
Custom Software Development · Web Development · Web Design
Cross Platform App and Full Stack Software Development Studio, Specialising in Cloud Delivery and Agile Practices.
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Eurolaser IT
Web Development · Web Design · IT Services
The Eurolaser Commitment – We will continually outperform any of your present suppliers on stock and speed of delivery.
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XsellTeam
Web Development · Web Design · IT Services
Outsourced Managed Sales & Marketing - Enabling Business Growth.
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Channeliser
Web Development · Web Design · IT Services
Channeliser Solutions provide technology for IT business selling through a channel.
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zobi
Web Development · Web Design · IT Services
1.8 billion data records are sold on the dark web every year. One of those is probably yours. Hackers target the weakest link to get your data, which is often your home network.
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IHS Markit
Web Development · Web Design · IT Services
IHS Markit is a global leader in information, analytics, and solutions for the major industries and markets that drive economies worldwide.
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OutThink
Web Development · Web Design · IT Services
An innovative, disruptive solution, OutThink redefines and evolves security awareness.
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Wilmington plc
Web Development · Web Design · IT Services
Wilmington plc is a dynamic and expanding company with a common aim of turning knowledge into an advantage.
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Cybanetix
Web Development · Web Design · UI/UX Design
Cybanetix is a leading provider of managed Cyber Security Service and hosted SIEM and breach detection services.
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Bico AI
Web Development · Web Design · IT Services
BICO AI is an Artificial Intelligence company focused on developing solutions to solve the complex challenges our clients and partners face.
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Stone Group Ltd
Web Development · Web Design · IT Services
It's our mission to improve the education, health, and quality of life of people in the UK through technology.
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Avoira
Web Development · Web Design · PHP
Avoira is the fusion of four business entities: Pennine, Videonations, Co-Channel, and also Rocom (from January 2020) into one new company.
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Athena Vaults
Web Development · Web Design · IT Services
Athena Vaults provides a holistic solution to your digital business requirements; Draw on leading industry experience and future-focused service to grow your business without…
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LDeX
Web Development · Web Design · IT Services
LDeX is a respected and trusted provider of data centre services and connectivity.
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How is this ranking worked out?

The order comes from what each firm publishes and what has been verified about it, and never from payment:

Profile completeness: the details a buyer needs to judge a firm — what it does, who it serves, how it prices, who it has worked for
Earned trust: verification, awards and the other checks a firm has actually passed
Client reviews, where they exist: the rating is smoothed, so one five-star review cannot outrank a firm with a hundred good ones, and volume counts with diminishing returns

Client reviews are still rare across this catalogue, so on most lists today the order is set by the first two. A firm near the top is the best-documented and best-verified one we hold, which is not the same claim as the best one to hire. Use the list to build a shortlist, then check the firms yourself.

Sponsored listings are labelled and shown apart from this list. How rankings work

Only firms whose profile names the UK are counted here, so a firm that lists a town but no country is not yet included.

Where else can I look?

The same list elsewhere: USA (714) · India (465) · Germany (222) · Canada (143).

Other specialisms in the UK: UI/UX design (941) · e-commerce (854) · Android app development (812) · iOS app development (800) · WordPress (752).

Every IT service provider in the UK: the full list.

Every category in the UK: the UK country page.

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

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

Top IT Service Providers for .NET in the UK

Chrysalis Technology

Syntax Integration Limited

Matsco Solutions

Entegraty

Claranet

5NINES Global

Pure Data Centres Group

Colt Technology Services

Cloud Optics Limited

QUANTIQ

Qubitsoft

Eurolaser IT

XsellTeam

Channeliser

zobi

IHS Markit

OutThink

Wilmington plc

Cybanetix

Bico AI

Stone Group Ltd

Avoira

Athena Vaults

LDeX