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Top Software Development Companies in the UK

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

Software development here means building software to order — a product, an internal system, or a replacement for something that has outgrown a spreadsheet. It spans firms that take a specification and deliver against it, and teams that work discovery-first and expect the specification to change.

The distinction worth establishing early is who owns the decisions. A supplier that builds exactly what was asked will deliver exactly what was asked, including the parts that were wrong. A partner that pushes back costs more in meetings and less in rework. Neither is better in the abstract; they suit different buyers and different projects, and the mismatch is where these engagements go wrong.

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Between them, the 443 best-ranked of these 444 IT service providers cover web development (386), web design (346), UI/UX design (207) and mobile app development (169). 434 of them have written a profile you can read before you get in touch.

TrustList ranks more than 400 software development companies in the UK, ordered on client reviews and profile quality, never on payment. At the top right now: Zepto Systems ltd, ADVOX Studio and Multi-Programming Solutions.

What to check before you shortlist a software development company

A discovery or specification phase before a fixed estimate
Who is on the team, and whether they stay for the whole project
That you own the intellectual property and the source code
Testing, documentation and maintenance after release

Filter by fitbudget, engagement, size and more

Aquarium Software
Custom Software Development · Web Development · UI/UX Design
We are an elite group of entrepreneurial technologists who in 2006 founded Aquarium and brought a shared vision to life.
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Skuuudle
Custom Software Development · Web Design · IT Services
Skuuudle provides retailers, distributors, and brands of all sizes with price and product intelligence, enabling them to optimize margins and increase market share through…
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AppyWay
Web Development · Web Design · IT Services
Ours is a journey that’s certainly been around the houses. We started out as AppyParking. An app made to solve the frustration of finding a parking space.
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Innovise
Custom Software Development · CRM Development · HTML5
Innovise is a vertically focused business working with global Facilities Management and Support Services businesses to supply its market-leading line of business applications:…
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Cazoo
Web Development · Web Design · UI/UX Design
Our mission is to transform the way people buy used cars. We realized that whilst people love their cars, they don’t always like the process of buying and selling them.
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Ocado Technology
Custom Software Development · Web Development · UI/UX Design
Ocado Technology is powering the future of online retail through disruptive innovation.
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3T Logistics
Web Development · Web Design · IT Services
3t Logistics is a global leader in the delivery of transportation and supply chain management solutions that improve service levels, drive down costs and ultimately create…
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Systems Technology
Web Development · Web Design · IT Services
Systems Technology is an award-winning organization providing premium devices, managed print services, and bespoke technology solutions - with a twist.
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Pinewood Technologies
Web Development · Web Design · IT Services
Pinewood Technologies provides dealer management software and support services to motor retailers and fleet providers in the UK and internationally.
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Big Marketing Ltd
Search Engine Optimization · Web Development · Web Design
Big Marketing. The full-service marketing agency. Follow us for ideas and inspiration (and advice on what NOT to do!) Marketing Agency Ideas with a difference...
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Smart Cookie Design Ltd
Mobile App Development · Search Engine Optimization · Web Development
Smart Cookie Design is an Ecommerce specialist agency and Shopify Experts helping businesses of all sizes grow online. Based in London.
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Product Hub Hob
Web Development · Web Design · UI/UX Design
Or, looking to get into Product Management? Then we have a lot in common.
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CL&SMA Limited
Web Development · Web Design · IT Services
We use the latest development technologies and techniques available to build future proof solutions to growing organizations, mainly, we specialize in High-Performance applications…
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Symology
Web Development · Web Design · UI/UX Design
Symology is the UK's leading provider of Street Works Management solutions and a leading supplier of integrated Highway Asset Management solutions.
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Phoebus Software Ltd
Web Development · Web Design · UI/UX Design
Phoebus Software Limited is a leading solutions provider to banking, building society and lending sectors.
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Avenir Business Solutions
Search Engine Optimization · Custom Software Development · Web Development
Avenir Business Solutions is a UK based Software Development and IT Consulting company founded in 2005.
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Bromcom
Custom Software Development · Web Development · Web Design
Bromcom has 25+ years’ experience providing innovative, leading edge award winning IT solutions to schools, colleges & local authorities that demanded more from their IT.
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Opencast Software
Web Development · Web Design · IT Services
Opencast Software is an Enterprise IT Consultancy that works with corporate IT departments to deliver their change.
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Cutover
Web Development · Web Design · UI/UX Design
Cutover, the leader in work orchestration and observability, is the only platform that provides full organizational visibility into dynamic flows of work, bringing them out of the…
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Vaxtor Recognition Technologies
Custom Software Development · Web Development · Web Design
Software for license plate recognition in the most demanding scenarios. We develop high-performance products and solutions for license plate recognition in any scenario.
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Blackbox Company (UK) Ltd
Web Development · Web Design · UI/UX Design
Blackbox Company Digital Customer Information Solution platform technology delivers real-time information at the right time, over the right channels for passenger and staff across…
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Insight Capital Partners
Mobile App Development · Web Development · Web Design
Insight Capital is an innovation company that implements investor-led ideas at speed and scale.
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telent Technology Services Ltd
Mobile App Development · Web Development · Web Design
telent is a leading technology company that designs and delivers solutions and services for organizations to create, improve and maintain their mission-critical communications…
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NHS Wales Informatics Service
Mobile App Development · Web Development · Web Design
NHS Wales Informatics Service is the national organization delivering technology and first-class digital health systems and services needed for modern patient care in Wales.
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How many software development companies are there in the UK?

444 companies on TrustList offer software development and are based in the UK. That makes the UK the number 2 software development market we rank, after the USA.

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 IT services (871) in the UK.

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Top Software Development Companies in the UK

Aquarium Software

Skuuudle

AppyWay

Innovise

Cazoo

Ocado Technology

3T Logistics

Systems Technology

Pinewood Technologies

Big Marketing Ltd

Smart Cookie Design Ltd

Product Hub Hob

CL&SMA Limited

Symology

Phoebus Software Ltd

Avenir Business Solutions

Bromcom

Opencast Software

Cutover

Vaxtor Recognition Technologies

Blackbox Company (UK) Ltd

Insight Capital Partners

telent Technology Services Ltd

NHS Wales Informatics Service

Want to see your company here?

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How many software development companies are there in the UK?

How is this ranking worked out?

What else do firms in the UK offer?

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Navigating the Selection Process: Tips for Choosing the Right Custom Software Development Firm

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