Company lists · Data refreshed September 2026

Top 25 IT provider for professional services firms based in the United Kingdom

RevenueBase identified 1,293 company matches for IT provider for professional services firms associated with the United Kingdom as of September 2026 and tracks 26,031 professional contacts across them, including 12,803 with verified work emails. London is the largest hub.

This list covers company matches for IT provider for professional services firms associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 21, 2026 How this list was built
1,293Companies
26,031Contacts tracked
12,803Verified emails
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The 25 largest IT provider for professional services firms based in the United Kingdom

Ranked by team size
Top 25 of 1,293 company matches for IT provider for professional services firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 21, 20265,001-10,0006,933 contacts →

Exact match

“BDO LLP is an accountancy and business advisory firm that provides Audit, Tax, Deals, and Consulting, Risk & Outsourcing (CR & O) services to entrepreneurial, growing and…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchSlough, United KingdomHQ recorded Sep 21, 20261,001-5,0002,218 contacts →

Exact match

“IRIS Software Group is a leading business software and services provider, one of the UK’s largest privately held software companies.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchCity Of London, United KingdomHQ recorded Sep 21, 20265,001-10,0001,840 contacts →

Exact match

“We are a specialist professional services and technology firm, working in partnership with leading insurance, highly regulated and global businesses.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchUk And Ireland, United KingdomHQ recorded Sep 21, 20261,001-5,0001,125 contacts →

Exact match

“We provide services that help businesses at every stage of the lifecycle.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Sep 21, 20261,001-5,000505 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 21, 2026201-500415 contacts →

Exact match

“BigHand is the specialist technology partner for the business of law and the performance engine within the firm.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 21, 20265,001-10,000415 contacts →

Exact match

“What does business need now?”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 21, 2026201-500379 contacts →

Exact match

“Welcome to the new era of accountancy.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchChesterfield, United KingdomHQ recorded Sep 21, 2026201-500375 contacts →

Exact match

“CCS Media is now officially part of Advania UK, the tech company with people at heart.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchColchester, United KingdomHQ recorded Sep 21, 2026201-500258 contacts →

Exact match

“Ellisons is one of the region’s oldest, most established and fastest growing firms.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchEpsom, United KingdomHQ recorded Sep 21, 202651-200238 contacts →

Exact match

“Penta Consulting provides the people to power your most ambitious projects.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchDaresbury, United KingdomHQ recorded Sep 21, 202651-200220 contacts →

Exact match

“CTS delivers IT services that transform the user experience and operational success of law firms and barristers’ chambers, both day-to-day and in the longer term.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchPencoed, United KingdomHQ recorded Sep 21, 202651-200211 contacts →

Exact match

“Technology services for the future.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchHaywards Heath, United KingdomHQ recorded Sep 21, 202610001+208 contacts →

Exact match

“Our IT professional services deliver expertise in effective business change, facilitated by technology.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchAlderley Edge, United KingdomHQ recorded Sep 21, 202651-200139 contacts →

Exact match

“Operations and intelligence engine for professional services firms.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-200120 contacts →

Exact match

“OpticoreIT is an IT Consultancy founded in 2013 to bridge a gap in the market between the major IT services providers and the consultancy market.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchEdinburgh, United KingdomHQ recorded Sep 21, 202651-200110 contacts →

Exact match

“We are an IT Consultancy and Managed Services company in Edinburgh with offices in London, Founded by Charles Scott, and Andrew Watson in We have successful Enterprise Consulting…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-200107 contacts →

Exact match

“NETbuilder is a leading provider of specialist software, consulting, and fully managed services to Government, Finance, Healthcare, Education, and Commercial markets.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Sep 21, 20261,001-5,000102 contacts →

Exact match

“With more than 2,500 people spanning our office network, we provide an extensive spectrum of personalised services, encompassing accounting, audit, tax, advisory, and business…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchTamworth, United KingdomHQ recorded Sep 21, 202651-20095 contacts →

Exact match

“Quiss Technology plc provides fully managed IT support for businesses across the UK, exploiting technology to deliver commercial advantages and business benefits to companies in a…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20088 contacts →

Exact match

“Founded in 2001 by lawyers, Global BPO provides bespoke legal and business services to law firms, professional service organisations and other businesses.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20082 contacts →

Exact match

“Beavis Morgan is part of the Kinbrook Group, a people-first accounting, wealth management, legal and professional advisory services group.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Sep 21, 20261,001-5,00078 contacts →

Exact match

“We offer a broad portfolio of IT and consulting services covering Governance and Strategy, Cloud, Data, Cybersecurity, Infrastructure and Applications, Managed IT and Security.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact matchEnfield, United KingdomHQ recorded Sep 21, 202651-20073 contacts →

Exact match

“Founded 30 years ago, DPS Software are one of the UK’s leading providers of practice management software for legal businesses.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchHarrow, United KingdomHQ recorded Sep 21, 202611-5073 contacts →

Exact match

“MG Group is a multi-disciplinary practice providing accounting, tax, audit, legal and business consulting services.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 25 of 1,293 IT provider for professional services firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 12,803 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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IT provider for professional services firms based in the United Kingdom at a glance

As of Sep 21, 2026
49.2%Verified-email coverage
20.1Average contacts per company
1-10Median size (employees)
35.9%Largest-city concentration · London
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
848
11-50
324
51-200
74
201-500
18
501-1,000
5
1,001-5,000
10
5,001-10,000
5
10001+
3

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 1,293 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “IT provider for professional services firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 12,803 professional contacts with verified work emails across the full matched dataset. 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 21, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “IT provider for professional services firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many IT provider for professional services firms are there based in the United Kingdom?

RevenueBase identified 1,293 company matches for IT provider for professional services firms associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

BDO UK tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most IT provider for professional services firms?

London leads with 464 company records, followed by Manchester (33) and Birmingham (19).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 12,803 professional contacts with verified work emails tracked across these 1,293 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 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 SmartSearch, 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.