Company lists · Data refreshed September 2026

Top 25 Accounting software implementation firms based in the United Kingdom

Name: Accounting software implementation firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 572 companies tracked

RevenueBase identified 572 accounting software implementation firms headquartered in the United Kingdom as of September 2026 and tracks 3,031 professional contacts across them, including 882 with verified work emails. London is the largest hub.

This list covers accounting software implementation firms 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 21, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

572Companies

3,031Contacts tracked

882Verified emails

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The 25 largest accounting software implementation firms based in the United Kingdom

Ranked by team size

Top 25 of 572 accounting software implementation firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to accounting software implementation firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Finansys	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	74 contacts →
	Indirect evidence “Running a business is hard enough without disconnected systems and slow processes getting in the way.” Source: RevenueBase Database · checked Sep 21, 2026
2	Eureka Solutions Scotland LTD	Indirect evidence	East Kilbride, United KingdomHQ checked Sep 21, 2026	51-200	64 contacts →
	Indirect evidence “At Eureka Solutions, we specialise in implementing powerful cloud-based systems that have the potential to revolutionise your business.” Source: RevenueBase Database · checked Sep 21, 2026
3	Adroit Accountax LTD	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	51 contacts →
	Indirect evidence “Empowering Businesses to Thrive Through Financial Clarity \| Adroit Accountax We're a team of passionate and experienced accountants dedicated to your business success.” Source: RevenueBase Database · checked Sep 21, 2026
4	Itas Solutions	Indirect evidence	Chester, United KingdomHQ checked Sep 21, 2026	11-50	44 contacts →
	Indirect evidence “Big enough for best-in-class support but small enough for your undivided attention, itas invests in your long-term success.” Source: RevenueBase Database · checked Sep 21, 2026
5	R.E.P.R.E.S.E.N.T	Indirect evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 21, 2026	51-200	42 contacts →
	Indirect evidence “You run an accountancy practice.” Source: RevenueBase Database · checked Sep 21, 2026
6	Iris Accountancy	Strong evidence	Slough, United KingdomHQ checked Sep 21, 2026	1,001-5,000	42 contacts →
	Strong evidence “IRIS is a long-established industry leader in accounting software and services for accountants and bookkeepers.” Source: RevenueBase Database · checked Sep 21, 2026
7	Pegasus Software	Strong evidence	Kettering, United KingdomHQ checked Sep 21, 2026	51-200	41 contacts →
	Strong evidence “Pegasus Software is one of the UK's leading suppliers of accounting software, cloud accounting software, business solutions and payroll software and has been for over 30 years.” Source: RevenueBase Database · checked Sep 21, 2026
8	Cedar BAY	Indirect evidence	Andoversford, United KingdomHQ checked Sep 21, 2026	51-200	37 contacts →
	Indirect evidence “Here at Cedar Bay we have years of experience implementing large scale ERP solutions.” Source: RevenueBase Database · checked Sep 21, 2026
9	Clear Business Outcome LTD	Indirect evidence	Sunderland, United KingdomHQ checked Sep 21, 2026	11-50	34 contacts →
	Indirect evidence “Clear Business Outcome Ltd - The Epicor People We help manufacturing, engineering and distribution businesses streamline their processes and increase efficiency through…” Source: RevenueBase Database · checked Sep 21, 2026
10	CODIS	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	34 contacts →
	Partial evidence “Codis are a successful and well established business software developer.” Source: RevenueBase Database · checked Sep 21, 2026
11	Accounts ETC	Indirect evidence	Cirencester, United KingdomHQ checked Sep 21, 2026	1-10	30 contacts →
	Indirect evidence “We found that there was often a breakdown in service between your bookkeeper and your accountant and that more often than not the accountant was spending a majority of their time…” Source: RevenueBase Database · checked Sep 21, 2026
12	G7 Business Solutions Limited	Partial evidence	Bristol, United KingdomHQ checked Sep 21, 2026	11-50	23 contacts →
	Partial evidence “G7 is a trusted and experienced expert in the implementation and support of business systems.” Source: RevenueBase Database · checked Sep 21, 2026
13	Castle Computer Services	Strong evidence	Bellshill, United KingdomHQ checked Sep 21, 2026	51-200	23 contacts →
	Strong evidence “Founded in 1982, Castle Computer Services provides accounting and financial management software, business intelligence solutions, cloud and managed IT services throughout the UK…” Source: RevenueBase Database · checked Sep 21, 2026
14	Arcus Universe Limited	Partial evidence	Camberley, United KingdomHQ checked Sep 21, 2026	11-50	22 contacts →
	Partial evidence “Arcus is the UK’s premier Acumatica ERP Implementation partner.” Source: RevenueBase Database · checked Sep 21, 2026
15	X3 Consulting LTD	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	22 contacts →
	Indirect evidence “A leading Sage X3 and Sage Intacct Business Partner.” Source: RevenueBase Database · checked Sep 21, 2026
16	UWM Accountants	Indirect evidence	Leeds, United KingdomHQ checked Sep 21, 2026	11-50	20 contacts →
	Indirect evidence “Leeds cloud accountants that care.” Source: RevenueBase Database · checked Sep 21, 2026
17	Optimum PPS	Indirect evidence	Birmingham, United KingdomHQ checked Sep 21, 2026	11-50	18 contacts →
	Indirect evidence “Optimum PPS is an independent ERP & digital transformation consultancy.” Source: RevenueBase Database · checked Sep 21, 2026
18	Iqlink	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	16 contacts →
	Indirect evidence “Supporting professional services firms with their requirements across setup, adoption, data migration, training, managed services and integrations.” Source: RevenueBase Database · checked Sep 21, 2026
19	Capvyuh Technology Limited	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	16 contacts →
	Indirect evidence “Capvyuh is a global Microsoft Partner and business solutions company helping organisations modernise operations, improve efficiency, and accelerate growth through intelligent…” Source: RevenueBase Database · checked Sep 21, 2026
20	HIT Technology	Partial evidence	Leicestershire, United KingdomHQ checked Sep 21, 2026	11-50	15 contacts →
	Partial evidence “At HIT Technology, we offer expert business management consultancy and are trusted resellers of industry leading software solutions which, together, enable you to integrate all…” Source: RevenueBase Database · checked Sep 21, 2026
21	Humony	Indirect evidence	Basingstoke, United KingdomHQ checked Sep 21, 2026	11-50	15 contacts →
	Indirect evidence “With over 30 years’ experience under our belt in helping our valued clients to work smarter, we find business solutions to your problems.” Source: RevenueBase Database · checked Sep 21, 2026
22	The Financial Management Centre	Indirect evidence	Crawley, United KingdomHQ checked Sep 21, 2026	51-200	15 contacts →
	Indirect evidence “The Financial Management Centre is a leading financial management consultancy that is committed to helping organisations achieve performance excellence.” Source: RevenueBase Database · checked Sep 21, 2026
23	7fc LLP	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	14 contacts →
	Partial evidence “7FC LLP - Digital Business ERP Transformation Consultants and software house.” Source: RevenueBase Database · checked Sep 21, 2026
24	Accurox	Indirect evidence	Chatham, United KingdomHQ checked Sep 21, 2026	1-10	14 contacts →
	Indirect evidence “At Accurox, we measure our success by yours.” Source: RevenueBase Database · checked Sep 21, 2026
25	Accountax Zone	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	13 contacts →
	Partial evidence “AccounTax Zone is a complete accounting and business solution that helps you keep track of your business finances, lend a hand in annual accounts, and other financial matters…” Source: RevenueBase Database · checked Sep 21, 2026

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: accounting software implementation firms. 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 accounting software implementation firms.
Partial evidence: Its own public description names part of accounting software implementation firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name accounting software implementation firms. 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 572 accounting software implementation firms based in the United Kingdom

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Accounting software implementation firms based in the United Kingdom at a glance

As of Sep 21, 2026

29.1%Verified-email coverage

5.3Average contacts per company

1-10Median size (employees)

25.0%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

439

11-50

109

51-200

201-500

1,001-5,000

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 572 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 accounting software implementation firms, 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 “accounting software implementation firms”. 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 accounting software implementation firms), 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 accounting software implementation firms, 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, 882 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 21, 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.

Accounting software implementation firms by metro

Accounting software implementation firms in London143

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 accounting software implementation firms, 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 accounting software implementation firms are there based in the United Kingdom?

RevenueBase identified 572 accounting software implementation firms 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?

Finansys, headquartered in London, tops this list with the largest team on record.

Which city has the most accounting software implementation firms?

London leads with 143 headquartered companies, followed by Manchester (10) and Sheffield (9).

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 882 verified decision-maker contacts tracked across these 572 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 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 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.