Company lists · Data refreshed September 2026

Top 25 Accounting integrations system software companies based in the United Kingdom

RevenueBase identified 147 company matches for accounting integrations system software companies associated with the United Kingdom as of September 2026 and tracks 2,100 professional contacts across them, including 1,047 with verified work emails. London is the largest hub.

This list covers company matches for accounting integrations system software companies 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
147Companies
2,100Contacts tracked
1,047Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest accounting integrations system software companies based in the United Kingdom

Ranked by team size
Top 25 of 147 company matches for accounting integrations system software companies 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, 2026501-1,000304 contacts →

Exact match

“Here at Aptitude, we provide software solutions to enable deliver fully autonomous finance so our customers can drive growth, efficiency and sustainability.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchHoughton Le Spring, United KingdomHQ recorded Sep 21, 202651-200156 contacts →

Exact match

“Inflo transforms the accounting profession by making leading-edge technologies accessible to all.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchWokingham, United KingdomHQ recorded Sep 21, 202651-200101 contacts →

Exact match

“The complete tax and accountancy practice software suite, powered by a single database.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchChurch Crookham, United KingdomHQ recorded Sep 21, 202651-20069 contacts →

Exact match

“Mysoft is an award-winning Sage Tech & Business partner.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchBristol, United KingdomHQ recorded Sep 21, 2026201-50065 contacts →

Exact match

“Xledger is a leading provider of cloud-based finance software.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact matchEast Kilbride, United KingdomHQ recorded Sep 21, 202651-20064 contacts →

Exact match

“At Eureka Solutions, we specialise in implementing powerful cloud-based systems that have the potential to revolutionise your business.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20061 contacts →

Exact match

“Validis - We get financial data.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchDerby, United KingdomHQ recorded Sep 21, 202651-20061 contacts →

Exact match

“We help businesses do more than just balance the books.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchBirmingham, United KingdomHQ recorded Sep 21, 202651-20061 contacts →

Exact match

“We help organisations get more from Sage business software.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20056 contacts →

Exact match

“Light is the new way to run multinational finances for modern technology companies.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchBury St Edmunds, United KingdomHQ recorded Sep 21, 202651-20050 contacts →

Exact match

“Sicon have been developing software applications for integration with Sage 200 for over 25 years and are well established as one of the leading developers in the UK and Ireland.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchChester, United KingdomHQ recorded Sep 21, 202611-5044 contacts →

Exact match

“Big enough for best-in-class support but small enough for your undivided attention, itas invests in your long-term success.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchNewcastle Upon Tyne, United KingdomHQ recorded Sep 21, 202611-5043 contacts →

Exact match

“ION implements cloud accounting solutions into Education, high-growth and PE-backed organisations.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchSlough, United KingdomHQ recorded Sep 21, 20261,001-5,00042 contacts →

Exact match

“IRIS is a long-established industry leader in accounting software and services for accountants and bookkeepers.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchKettering, United KingdomHQ recorded Sep 21, 202651-20041 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20035 contacts →

Exact match

“At Acting Office we deliver a fully integrated software platform designed for modern accountancy practices that want precision, efficiency and complete visibility across their…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchPoole, United KingdomHQ recorded Sep 21, 202651-20035 contacts →

Exact match

“Codeless Platforms helps ERP-driven organisations connect systems and automate business processes.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5032 contacts →

Exact match

“Ember is a specialist accounting and tax software platform and was acquired by Starling Bank in 2025.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchGrantham, United KingdomHQ recorded Sep 21, 202611-5027 contacts →

Exact match

“Khaos Control is an employee owned, UK-based, provider of powerful, all‑in‑one ERP and business management software designed for multi‑channel retailers, wholesalers, and growing…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5026 contacts →

Exact match

“Cloud-native finance and accounting software for multi-entity and multi-currency organisations.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5026 contacts →

Exact match

“We connect your CRM, ERP, AI and Cloud systems, bridging internal platforms and external tools so your data flows cleanly, your processes run automatically, and your business…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchNewcastle Upon Tyne, United KingdomHQ recorded Sep 21, 202611-5025 contacts →

Exact match

“Zynk is one of leading Integration Platform as a Service providers specializing in accounting data integration.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchBellshill, United KingdomHQ recorded Sep 21, 202651-20023 contacts →

Exact match

“Founded in 1982, Castle Computer Services provides accounting and financial management software, business intelligence solutions, cloud and managed IT services throughout the UK…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5022 contacts →

Exact match

“A leading Sage X3 and Sage Intacct Business Partner.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchSlough, United KingdomHQ recorded Sep 21, 202611-5019 contacts →

Exact match

“We help UK organisations modernise finance and operations with Sage 200, Sage Intacct and Sage ERP solutions.”

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

Showing 25 of 147 accounting integrations system software companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,047 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Accounting integrations system software companies based in the United Kingdom at a glance

As of Sep 21, 2026
49.9%Verified-email coverage
14.3Average contacts per company
1-10Median size (employees)
25.9%Largest-city concentration · London
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
76
11-50
43
51-200
22
201-500
2
501-1,000
1
1,001-5,000
1
10001+
1

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 147 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 “accounting integrations system software companies” 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 1,047 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.

Accounting integrations system software companies by metro

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 “accounting integrations system software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many accounting integrations system software companies are there based in the United Kingdom?

RevenueBase identified 147 company matches for accounting integrations system software companies 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?

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

Which city has the most accounting integrations system software companies?

London leads with 38 company records, followed by Bristol (4) and Edinburgh (3).

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 1,047 professional contacts with verified work emails tracked across these 147 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.

Ready to reach these companies? Verified emails and direct dials for all 147 accounting integrations system software companies based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

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.