Company lists · Data refreshed September 2026
Top 25 Business services companies based in the United Kingdom
RevenueBase identified 695 business services companies headquartered in the United Kingdom as of September 2026 and tracks 3,169 professional contacts across them, including 1,234 with verified work emails. London is the largest hub.
This list covers business services companies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest business services companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 379 contacts → | ||||
Indirect evidence “Welcome to the new era of accountancy.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 93 contacts → | ||||
Indirect evidence “BDO NI specialises in helping businesses, whether start-ups or multinationals, to grow.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 74 contacts → | ||||
Indirect evidence “Streamline your business with our bespoke support services.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 73 contacts → | ||||
Indirect evidence “MG Group is a multi-disciplinary practice providing accounting, tax, audit, legal and business consulting services.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 64 contacts → | ||||
Indirect evidence “At MPA, we exist to help business owners navigate the complex journey of scaling and exiting their businesses.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 50 contacts → | ||||
Indirect evidence “We are proud to be the business services company of choice to many of the UK’s best-run businesses, specialising in the licensed trade and hospitality industry.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 47 contacts → | ||||
Indirect evidence “Leading providers of specialist support services.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 46 contacts → | ||||
Indirect evidence “We proudly announce that WMT has joined forces with Moore Kingston Smith, creating a stronger, unified team with shared values and a commitment to excellence.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 35 contacts → | ||||
Indirect evidence “Not just accountants We provide business support and advice, creating and retaining wealth for our clients.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 32 contacts → | ||||
Indirect evidence “Briars - Scale Locally, Expand Globally 30 Years in Business, 150+ Years of Combined Expertise Trusted by Clients Global Coverage across 100+ Countries At Briars, we are your…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 32 contacts → | ||||
Indirect evidence “We are a group of experienced professionals who work towards ascending your company to new heights through consultancy and business advice.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 31 contacts → | ||||
Indirect evidence “Working with companies and business leaders, Verallo's experienced team quickly analyses each client's needs to deliver highly personalised business services that take a strategic…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 29 contacts → | ||||
Indirect evidence “A fashionable, contemporary and forward-thinking, brokerage for business essential resources/services, with an ear to the ground and a finger on the pulse.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 24 contacts → | ||||
Indirect evidence “Oakford Advisors Ltd, a Centralis Group company, is an outsourced business services firm which specialises in providing back-office support to start-up or existing companies…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 22 contacts → | ||||
Indirect evidence “Isaacs is an established and highly reputable organisation providing a wide range of professional services, including accountancy, financial management and other advisory…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 20 contacts → | ||||
Indirect evidence “Breslins is a leading firm of Chartered Accountants, Business Consultants and Marketing Strategists, helping ambitious businesses across the Midlands and beyond achieve…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 20 contacts → | ||||
Indirect evidence “Let us help you grow your business.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 20 contacts → | ||||
Indirect evidence “Business Management Consultant and Expert” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 19 contacts → | ||||
Indirect evidence “A consistently progressive approach to client service keeps the Beatons Group at the forefront of local and national business.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 19 contacts → | ||||
Indirect evidence “Designated PA provides flexible business support services to small business owners, consultants and professionals.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 18 contacts → | ||||
Indirect evidence “We will help business owners achieve their dreams by helping them with their numbers to have a better business and life." A skilled team who work with you We employ a team of…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 18 contacts → | ||||
Indirect evidence “Here at Sempar our ethos is to shape business futures.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 16 contacts → | ||||
Indirect evidence “We want to improve your business and help in areas that you probably didn't expect from accountants.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 15 contacts → | ||||
Indirect evidence “Navigating today’s business landscape is more challenging than ever.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 15 contacts → | ||||
Indirect evidence “When you engage us to act as your outsourced finance team, we not only provide financial and business support, but in conjunction with our wider community of legal experts and tax…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: business services companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names business services companies.
- Partial evidence
- Its own public description names part of business services companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name business services companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 695 business services companies based in the United Kingdom
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Business services companies based in the United Kingdom at a glance
As of Sep 19, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 695 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among business services companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United Kingdom whose own description of what they do matches “business services companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names business services companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among business services companies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 1,234 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Business services companies by metro
- Business services companies in London185
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names business services companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many business services companies are there based in the United Kingdom?
RevenueBase identified 695 business services companies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Gravita, headquartered in London, tops this list with the largest team on record.
Which city has the most business services companies?
London leads with 185 headquartered companies, followed by Manchester (13) and Edinburgh (10).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,234 verified decision-maker contacts tracked across these 695 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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