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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

Synetec
Web Development · Web Design · IT Services
Synetec is the trusted partner for reliable bespoke software solutions for operationally-critical environments.
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KRM22
Web Development · Web Design · IT Services
We help capital markets companies reduce the cost and complexity of risk management.
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Trainline
ERP Software Development · Web Development · Web Design
Trainline is the leading independent rail and coach travel platform selling rail and coach tickets to millions of travelers worldwide.
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BroadGroup
Web Development · Web Design · IT Services
We are BroadGroup. BroadGroup was founded in 2002 with the aim of providing senior IT infrastructure executives and the enterprises they service a new perspective.
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BSMimpact
Web Development · Web Design · IT Services
BSMimpact is a global consulting and training organization focused on the non-technical elements of ICT and engages in the provision of Business and IT services leveraging best…
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CloudRock Partners
Web Development · Web Design · IT Services
We are a specialist HR technology transformation consultancy, navigating organizations through their cloud journey and the obstacles that may bring.
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Razberi Technologies
Web Development · Web Design · IT Services
Razberi Technologies makes it simple to manage and secure video surveillance and network-connected devices.
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Thruvision
Web Development · Web Design · IT Services
Thruvision is the leading provider of next-generation people-screening technology.
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Digital Barriers plc
Web Development · Web Design · IT Services
Redefining edge-intelligent video surveillance and security. Digital Barriers is a world leader in edge-intelligent solutions for the global surveillance and security markets.
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Trustmarque
Web Development · Web Design · IT Services
Trustmarque delivers customer-centric IT solutions that enable better outcomes.
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MTI
Web Development · Web Design · IT Services
MTI is a global solutions and service provider, underpinned with operational excellence and experience gained through thousands of client and partner engagements.
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Air IT
Web Development · Web Design · IT Services
Independently ranked amongst the world’s most progressive Managed Service Providers (MSPs), we’re proud to be the Midlands’ No.1.
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Amplience
Web Development · Web Design · IT Services
Amplience dramatically simplifies how clients plan, create, manage, and deliver content.
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OSF Global Services
Web Development · Web Design · IT Services · Also in Canada
OSF Global Services is a top digital Cloud transformation specialist and leading global commerce solutions company that provides consulting, application development and…
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Vuealta
Mobile App Development · Social Media Marketing · Web Development
Vuealta is an international company providing tailored advisory, implementation, and ongoing support services for Anaplan, a leading planning platform provider.
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BCSG
Web Development · Web Design · IT Services
BCSG is a leading cloud services marketplace provider; our experienced team has been providing IT applications to small businesses for the past 10 years in partnership with global…
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Piccadilly Group
Web Development · Web Design · IT Services
Piccadilly Group is a technology and delivery acceleration specialist dedicated to providing specialist domain skills, expert knowledge, and delivery capability to the entire…
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Armakuni
Web Development · Web Design · IT Services
In an era where speed to market key differentiator, Armakuni are specialists in driving the cultural and technical change required to build high quality, robust & reliable software…
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AMPP Group
Web Development · Web Design · IT Services
AMPP Group is a fast-growth, culture-driven technology company building B2B marketplaces that change the way business connects in emerging markets.
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Synel Industries UK
Web Development · Web Design · IT Services
Synel Industries develop, produce, supply and install computerized systems for data collection, time & attendance, job costing, registration, and access control applications.
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Wavestore
Web Development · Web Design · IT Services
Sitting at the heart of a security solution, Wavestore’s open platform Video Management Software (VMS) offers so much more than just industry-leading video and recording…
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Quadrant Security Group
Web Development · Web Design · IT Services
Quadrant Security Group (QSG) is one of the UK’s largest independent security systems integrators, delivering end-to-end security and surveillance solutions from systems design to…
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Norbain SD
Web Development · Web Design · IT Services
Norbain is the UK’s most successful distributor of IP, CCTV, Access Control and Intruder Detection solutions.
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Loop Email
Web Development · Web Design · IT Services
We understand that managing email can feel like hard work, but try and imagine a world where you love email – where email works hard for you.
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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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More on TrustList

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

Top IT Service Providers for .NET in the UK

Synetec

KRM22

Trainline

BroadGroup

BSMimpact

CloudRock Partners

Razberi Technologies

Thruvision

Digital Barriers plc

Trustmarque

MTI

Air IT

Amplience

OSF Global Services

Vuealta

BCSG

Piccadilly Group

Armakuni

AMPP Group

Synel Industries UK

Wavestore

Quadrant Security Group

Norbain SD

Loop Email