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Top IT Service Providers in London

50 of 107 IT service providers ranked on evidence in the Q4 2026 edition.

Between them, the 107 IT service providers on this page cover web development (96), web design (85), UI/UX design (56) and IT services (55). They also list work in United Kingdom, United States of America, Ireland and Russia. 107 of them have written a profile you can read before you get in touch.

TrustList ranking

Q4 2026 edition

50 of 107 IT service providers ranked on evidence held on 6 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 IT service providers 50 ranked SMEs 49 ranked

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ClerksWell
Search Engine Optimization · Web Development · Web Design · Also in United Kingdom
ClerksWell is a digital agency that began in 1997. It designs, builds and supports content management, ecommerce and digital experience platforms.
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Why #1: Based in London, UK · Founded 1997 · ISO 27001, Cyber Essentials, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Bell Integration
Web Development · Web Design · UI/UX Design · Also in United Kingdom
Bell Integration is a privately held IT services and consulting company headquartered in the UK.
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Why #2: Based in UK, with offices in London, Portsmouth, Wokingham, Stevenage, Glasgow and… · Founded 1996 · ISO 9001, ISO 27001, Cyber Essentials, professional accreditation · Placed below first here: a listing leads at most 5 rankings, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Wavex Technology Ltd
Web Development · Web Design · UI/UX Design · Also in United Kingdom
Wavex Technology Ltd is an independent managed IT services company founded in 1998.
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Why #3: Based in London · Founded 1998 · ISO 27001, Cyber Essentials, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Usha Martin Technologies
Web Development · Web Design · UI/UX Design · Also in United Kingdom
Usha Martin Technologies, often shortened to UMT, is the technology services arm of the Usha Martin Group.
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Why #4: Based in London, United Kingdom · In business 20+ years · ISO 9001, professional accreditation, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
CI
Codec Ireland
Web Development · Web Design · IT Services · Also in Ireland
Irish IT consultancy delivering Microsoft-based digital projects for public and private sector organisations in Ireland and the UK
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Why #5: Office in London · Founded 1985 · Microsoft partner · Team of 240+, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Syntax Integration Limited
Web Development · Web Design · IT Services · Also in United Kingdom
Syntax Integration Limited is an IT support company based in Marylebone, London. It was established in 1993 and looks after IT for businesses in the capital and beyond.
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Why #6: Based in London, UK · Founded 1993 · ISO 9001, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Matsco Solutions
Web Development · Web Design · UI/UX Design · Also in United Kingdom
Matsco Solutions is a managed IT service provider headquartered in London.
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Why #7: Based in London, UK · Founded 2002 · ISO 27001, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Timico
Web Development · Web Design · IT Services · Also in United Kingdom
Timico is a managed cloud service provider that plans and runs IT for mid-sized businesses.
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Why #8: Office in London · Founded 2004, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Selesti
Search Engine Optimization · Web Development · Web Design · Also in United Kingdom
Selesti is a digital agency with offices in Norwich and London. It has worked with clients since 2005 and is a Google partner agency.
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Why #9: Based in Norwich and London, UK · Founded 2005 · Google partner, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Core Technology Systems
CRM Development · HTML5 · JavaScript · Also in United Kingdom
Core Technology Systems, known as Core, is an IT consultancy that builds its services around Microsoft technology.
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Why #10: Address in London · In business 20+ years · Microsoft partner, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
BB
Bakken & Bæck AS
Web Development · Web Design · IT Services · Also in Norway
Bakken & Bæck AS is a design and technology studio that builds digital products from first idea to launch. It began in 2011 and is owned by the people who founded it.
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Why #11: Office in London · Founded 2011 · Team of 60+, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Time Out Group plc
Web Development · Web Design · IT Services · Also in United Kingdom
Time Out Group plc is a media and leisure business headquartered in London. It began in London in 1968 as a guide to the city's urban culture.
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Why #12: Based in London, United Kingdom · Founded 1968, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
A
Arkphire
Web Development · Web Design · IT Services · Also in Ireland
IT infrastructure supplier and managed services provider for multinational companies across Europe, the Middle East, Africa and Asia-Pacific
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Why #13: Office in London · In business 40+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Activate Media
Web Development · Web Design · UI/UX Design · Also in United Kingdom
Activate Media is a digital design and development agency based in London, founded in 1992.
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Why #14: Based in London, United Kingdom · Founded 1992, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
EG
Etraveli Group
Software Development · E-Commerce Development · WordPress · Also in Sweden
Etraveli Group is a travel technology company focused on flights.
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Why #15: Office in London · Founded 2000, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Company85
Web Development · Web Design · UI/UX Design · Also in United Kingdom
Company85 is a London-headquartered independent IT services and consulting firm, also branded c85. It focuses on IT transformation and information protection.
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Why #16 (shared): Based in London, UK · In business 25+ years, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Excis Ltd
Web Development · Web Design · IT Services · Also in United Kingdom
Excis Ltd is an IT services company with its headquarters in London. It was founded in Belgium in 2001 and later expanded across Europe.
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Why #16 (shared): Based in London, United Kingdom · Founded 2001, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
zsah
Web Development · Web Design · UI/UX Design · Also in United Kingdom
zsah is a managed technology services company based in central London.
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Why #18: Based in central London · Founded 2002, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Active Webdezign ltd.
Mobile App Development · Search Engine Optimization · Web Development · Also in United Kingdom
Active Webdezign ltd. is a web design and IT services agency based in London.
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Why #19 (shared): Based in London, UK · In business 23+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
CTI Digital
Mobile App Development · Web Development · UI/UX Design · Also in United States of America
CTI Digital is a digital and marketing agency headquartered in Manchester, with a second office in London.
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Why #19 (shared): Based in Manchester, United Kingdom, with a London office · Founded 2003, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
blackmirror media
Web Development · Web Design · IT Services · Also in Austria
blackmirror media is a consulting agency founded in 2004. It has branches in London in the UK and Vienna in Austria. Its work ranges from software architecture to brand management.
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Why #21: Office in London · Founded 2004, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Avenir Business Solutions
Search Engine Optimization · Custom Software Development · Web Development · Also in United Kingdom
London-headquartered software development and IT consulting company serving finance, retail, manufacturing and travel clients
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Why #22 (shared): Based in London, UK · Founded 2005, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Cyber-Duck Ltd
Web Development · Web Design · UI/UX Design · Also in United States of America
Cyber-Duck Ltd is a digital transformation agency set up in 2005, with teams in London and Hertfordshire.
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Why #22 (shared): Based in London and Hertfordshire · Founded 2005, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Truphone
Mobile App Development · Web Development · Web Design · Also in United Kingdom
Truphone is a mobile connectivity company headquartered in London. Since 2006 it has built SIM software, management platforms and a global network.
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Why #24 (shared): Based in London · Founded 2006, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.

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Top IT Service Providers in London

ClerksWell

Bell Integration

Wavex Technology Ltd

Usha Martin Technologies

Codec Ireland

Syntax Integration Limited

Matsco Solutions

Timico

Selesti

Core Technology Systems

Bakken & Bæck AS

Time Out Group plc

Arkphire

Activate Media

Etraveli Group

Company85

Excis Ltd

zsah

Active Webdezign ltd.

CTI Digital

blackmirror media

Avenir Business Solutions

Cyber-Duck Ltd

Truphone

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