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Top Software Development Companies in London

16 of 64 software development companies ranked on evidence in the Q4 2026 edition.

Between them, the 64 best-ranked of these 67 software development companies cover web development (29), web design (23), eCommerce (22) and mobile app development (20). They also list work in Birmingham, City of London and Karachi. 64 of them have written a profile you can read before you get in touch.

TrustList ranking

Q4 2026 edition

16 of 64 software development companies ranked on evidence held on 12 October 2026: client reviews, vetting, awards and facts each business states on its own website, which we read and date. Nobody pays to be placed.

Positions are fixed for the quarter; the next edition is due in January 2027.

How this is ranked About this edition

All software development companies 16 ranked SMEs 16 ranked

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DCSL Software Ltd
Custom Software Development · Web Development · Web Design · Also in United Kingdom
DCSL Software Ltd is a bespoke software firm serving businesses across the UK from London and the South East. It was founded in 1994 and makes and supports custom systems and apps.
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Why #1: Based in London and the South East, UK · Founded 1994 · ISO 9001, ISO 27001, Microsoft partner, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Light IT
Mobile App Development · Web Development · Software Development · Also in Kyiv
Light IT is a software development company that began as a development team and grew into a data science business.
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Why #2: Address in London · Founded 2006 · Client numbers stated on its own website, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Mad Devs
Custom Software Development · Web Development · Web Design · Also in Kyrgyzstan
Mad Devs is a software engineering company that builds custom software and AI systems for clients across the world.
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Why #3: Address in London · Founded 2016 · Team of 120+ · Client numbers stated on its own website, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Synetec
Web Development · Web Design · UI/UX Design · Also in United Kingdom
Synetec is a UK software company that builds custom software for operationally critical environments. It is independently owned by its two co-founders.
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Why #4: Address in London · Founded 2000, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Softwire
Mobile App Development · Custom Software Development · Web Development · Also in United Kingdom
Softwire is a privately owned, independent technology consultancy based in London.
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Why #5: Based in London · In business 25+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
ARCH
Mobile App Development · Web Development · iOS App · Also in United Kingdom
ARCH is a UK software developer that designs and builds apps, websites and AI products. The studio was founded in 2005 and has offices in Gateshead, Edinburgh and London.
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Why #6: Based in Gateshead, Edinburgh and London, UK · Founded 2005, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
DataTherapy
Mobile App Development · Web Development · Web Design · Also in United Kingdom
DataTherapy is a UK software developer that specialises in the Claris FileMaker platform.
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Why #7: Address in London · In business 20+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Q-Solutions
Mobile App Development · Custom Software Development · Web Development · Also in Karachi
Software development company with a delivery centre in Karachi, building products, automation and engineering teams for clients abroad
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Why #8 (shared): Based in Karachi, with offices in Chicago and London · Founded 2008, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
SL
Synnous Ltd
Web Development · Software Development · UI/UX Design · Also in United Kingdom
Synnous Ltd is a product development and engineering company working from London and Athens.
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Why #8 (shared): Based in London, UK, and Athens, Greece · Founded 2008, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Get Web, Inc.
UI/UX Design · eCommerce · Cloud
Get Web, Inc., which trades as Getweb, is a design and development company that takes digital products from first idea through build, testing and ongoing support.
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Why #8 (shared): Address in London · Founded 2008, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
MobiDev
Mobile App Development · Web Development · Web Design · Also in United States of America
MobiDev is a software development company with offices in Atlanta, USA, and Sheffield, UK. It has built software products since 2009 for companies around the world.
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Why #11: Address in London · Founded 2009, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Magora
Mobile App Development · Web Development · Web Design · Also in United Kingdom
Magora is a software company that develops bespoke apps and web platforms, with a base in London.
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Why #12: Based in London, UK · Founded 2010, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Aelius Venture Pvt. Ltd
Mobile App Development · Search Engine Optimization · Social Media Marketing · Also in India
Aelius Venture Pvt. Ltd is a software development company that builds platforms for clients in the United States and Europe.
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Why #13 (shared): Address in London · Founded 2014, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
JD
James Dowen
Consumer Products & Services · Business Services · Financial Services · Also in Birmingham
James Dowen is a freelance web designer, web developer and AI software engineer working from Birmingham and London.
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Why #13 (shared): Based in Birmingham and London, UK · In business 12+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Zenitech
Mobile App Development · Web Development · Web Design · Also in United Kingdom
Zenitech is a technology consultancy with offices in London, Cluj-Napoca and Vilnius.
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Why #15: Office in London · In business 10+ years · Team of 160+, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Satva Softech
Mobile App Development · Web Development · Web Design · Also in United Kingdom
Satva Softech is a software consultancy and web development company. Its offices are in London and India, and a later site also lists a base in Raleigh, North Carolina.
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Why #16: Based in London, UK, and Raleigh, USA · In business 10+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Also listed, not yet ranked. We hold nothing checkable on these yet that ranks them here: no client review, vetting, award, expert review, or fact stated on their own website (and on a place ranking, where they are based). They follow in order of their TrustList Score. How TrustList ranks · Get vetted, free
C-BIA Consulting Ltd
Consumer Products & Services · Data Analytics · Business Intelligence
UK business intelligence and data analytics consultancy building Microsoft Azure applications for healthcare, education and research
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On record: Founded 2006 · Project numbers stated on its own website, as stated on its own website, read 28 Sept 2026
Devexperts
Software Development · Business Services · Information Technology
Devexperts builds software for capital markets, supplying trading platforms and exchange systems to brokers, prop trading firms, exchanges, banks and wealth managers.
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On record: Founded 2002, as stated on its own website, read 29 Sept 2026
Infinite Solutions
.NET · Cloud · Outsourcing
Microsoft Dynamics 365 partner offering ERP implementation, development and IT outsourcing for organisations across Europe and beyond
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On record: Microsoft partner, as stated on its own website, read 5 Oct 2026
Alluxi
Top Software Development Companies · Top Website Development Companies · Top Web Design Companies · Also in Nottingham and Dublin
We walk you through our proven development methodology, which we have tested and polished for years.
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Ash IT Service
Top Software Development Companies · Top Website Development Companies · Information Technology · Also in City of London
ASH IT Service is a leading software development company specialising in technology-driven business solutions.
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Astpp Open Source VoIP Billing Solution
Top Software Development Companies · Top Website Development Companies · Business Services
ASTPP is recognized as the top open-source VoIP billing solution, designed to facilitate seamless communication and management for VoIP service providers.
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On record: Address in London
Centous Solutions
Supply Chain, Logistics, and Transport · Consumer Products & Services · Top Software Development Companies · Also in Birmingham
At Centous, we're dedicated to delivering advanced digital solutions that drive progress and fuel growth for our clients.
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Teqnovos Ltd
Hospitality & Leisure · Medical
Teqnovos is a leading mobile and web app development company that caters to the technological needs of a wide variety of businesses.
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On record: Address in London

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Top Software Development Companies in London

DCSL Software Ltd

Light IT

Mad Devs

Synetec

Softwire

ARCH

DataTherapy

Q-Solutions

Synnous Ltd

Get Web, Inc.

MobiDev

Magora

Aelius Venture Pvt. Ltd

James Dowen

Zenitech

Satva Softech

C-BIA Consulting Ltd

Devexperts

Infinite Solutions

Alluxi

Ash IT Service

Astpp Open Source VoIP Billing Solution

Centous Solutions

Teqnovos Ltd

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