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Top Business Service Companies in London

10 of 49 business service companies ranked on evidence in the Q4 2026 edition.

Between them, the 49 business service companies on this page cover cloud (9), legal (9), outsourcing (7) and accounting (5). They also list work in York, Liverpool, Manchester and New York. 49 of them have written a profile you can read before you get in touch.

TrustList ranking

Q4 2026 edition

10 of 49 business service 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 business service companies 10 ranked SMEs 10 ranked

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Goodwille
Overseas firms that want a UK presence turn to Goodwille, which sets up their company or branch and then runs it.
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Why #1: Address in London · In business 25+ years · Client numbers stated on its own website, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
KELCOM
Security
Windsor, Ontario telecom dealer offering business phone, internet, two-way radio, GPS fleet tracking and security systems
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Why #2: Office in London · Founded 1969, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
IWCE
Mobile App Development · Web Development · iOS App · Also in Georgia
IWCE is an annual trade show and conference for people who work with critical communications and wireless technology.
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Why #3: Address in London · Founded 1977, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Ex Events
Insurance · Banking · external · Also in Chester and Kennington
Ex Events has been planning corporate events from London since 1989, and its work now spans the UK and, when clients ask, overseas.
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Why #4: Based in London, UK · Founded 1989, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
Good Look Events
London event planning and production agency Good Look Events has been in the business for more than 24 years.
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Why #5: Based in London, UK · In business 24+ years, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
Dynamite Events
Working out of London for more than 21 years, the agency has built its business on parties, live music and entertainment.
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Why #6: Based in London · In business 21+ years, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
Truphone
Web Development · IT Services · Web Design · Also in United Kingdom
Truphone is a mobile connectivity company, now presenting itself under the 1GLOBAL name.
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Why #7: Based in London headquarters, per earlier listing text · Founded 2006, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Global Retail Recruitment
Retail · Property · Electronics · Also in Asia and Middle East
Working only with retail and consumer businesses, Global Retail Recruitment runs executive searches for clients.
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Why #8: Address in London · Founded 2008, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
Direct Payroll
Business Services · Cloud · Outsourcing · Also in Windsor
Operating in London and the surrounding area, Direct Payroll runs managed payroll for clients of all kinds.
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Why #9 (shared): Based in London · Client numbers stated on its own website, as stated on its own website, read 9 Oct 2026
Not yet on record: client reviews, vetting.
BNW Accountants
A London accountancy firm that serves the whole of the UK online, BNW Accountants aims at owners who would rather hand the paperwork over than learn it.
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Why #9 (shared): Based in London, UK · Client numbers stated on its own website, 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
JAC Recruitment Indonesia
Financial Services · Legal · Outsourcing · Also in Indonesia
Part of the JAC global network, which began in London in 1975, JAC Recruitment Indonesia places mid-senior professionals and specialists in Indonesia.
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On record: Founded 1975, as stated on its own website, read 9 Oct 2026
JAC Recruitment Vietnam
Financial Services · Legal · Outsourcing · Also in Ho Chi Minh City
The Vietnamese office of the JAC global network, JAC Recruitment Vietnam, finds new roles for mid-senior professionals and specialists.
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On record: Founded 1975, as stated on its own website, read 9 Oct 2026
Antal
Cloud · Outsourcing · external
Antal calls its model a global recruitment solution applied locally.
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On record: Founded 1993, as stated on its own website, read 5 Oct 2026
Anika Digital Media
Quality Assurance · Web Design · Digital Marketing
Anika Digital Media takes a website from build to promotion to upkeep: it designs and develops the site, promotes it on Google and social networks, and afterwards looks after…
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On record: In business 12+ years, as stated on its own website, read 5 Oct 2026
GCS Group
Business Services · Also in Shanghai and Islamabad
GCS Group assists clients at every stage of the cryptocurrency license application process.
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64TEQ
Cloud · Queries
Working from a London base, 64TEQ operates as a value added reseller, standing between equipment makers and the firms that buy their products.
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On record: Based in United Kingdom, with a London focus
Abbey Offices
Also in Shepherds Bush and Hammersmith
Abbey Offices is a serviced office operator. Its Brook Green building sits in the Hammersmith and Shepherd's Bush area of west London and offers creative coworking, hot desking and…
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On record: Based in Hammersmith, London
ACCOTAX
With an entrepreneurial outlook, ACCOTAX is a London practice whose accountants are chartered.
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On record: Based in London, United Kingdom
Affinity Associates
Outsourcing · Accounting · Tax
Affinity Associates is a group combining chartered accountants, consultants, auditors, financial advisers and IT specialists, and has worked since the 1960s with small and…
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Arkwright Consulting
Arkwright Consulting is a management consultancy that advises private corporations, investors, non-governmental organisations and startup companies on strategy.
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On record: Boutique
Biscuit Recruitment
Biscuit Recruitment is a small London agency that finds people for support roles inside businesses.
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On record: Based in London, UK · Boutique
Braant Accounting
Arts, Entertainment & Music · Financial Services · Real Estate
London accountancy firm covering bookkeeping, tax, payroll and part-time finance directors for small and medium businesses
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On record: Based in London, United Kingdom
BrainStation
BrainStation teaches digital and technology skills through intensive coding bootcamps and shorter certificate courses.
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On record: Address in London
Cashbook Finance
Cashbook Finance is an FCA-registered UK finance company with two funding lines: invoice finance and bridging finance.
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On record: Based in London, UK

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Top Business Service Companies in London

Goodwille

KELCOM

IWCE

Ex Events

Good Look Events

Dynamite Events

Truphone

Global Retail Recruitment

Direct Payroll

BNW Accountants

JAC Recruitment Indonesia

JAC Recruitment Vietnam

Antal

Anika Digital Media

GCS Group

64TEQ

Abbey Offices

ACCOTAX

Affinity Associates

Arkwright Consulting

Biscuit Recruitment

Braant Accounting

BrainStation

Cashbook Finance

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