Company lists · Data refreshed October 2026

Top 25 Accounting integration software companies based in the United Kingdom

RevenueBase identified 107 company matches for accounting integration software companies associated with the United Kingdom as of October 2026 and tracks 1,524 professional contacts across them, including 779 with verified work emails. London is the largest hub.

This list covers company matches for accounting integration 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 October 1, 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 Oct 1, 2026 How this list was built
107Companies
1,524Contacts tracked
779Verified emails
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The 25 largest accounting integration software companies based in the United Kingdom

Ranked by team size
Top 25 of 107 company matches for accounting integration software companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 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 Oct 1, 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 · Oct 1, 2026 · View company records in RevenueBase
2Exact matchHoughton Le Spring, United KingdomHQ recorded Oct 1, 202651-200156 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
3Exact matchWokingham, United KingdomHQ recorded Oct 1, 202651-200101 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
4Exact matchBristol, United KingdomHQ recorded Oct 1, 2026201-50065 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
5Exact matchDerby, United KingdomHQ recorded Oct 1, 202651-20061 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
6Exact matchBirmingham, United KingdomHQ recorded Oct 1, 202651-20061 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7Exact matchChester, United KingdomHQ recorded Oct 1, 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 · Oct 1, 2026 · View company records in RevenueBase
8Exact matchNewcastle Upon Tyne, United KingdomHQ recorded Oct 1, 202611-5043 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
9Exact matchSlough, United KingdomHQ recorded Oct 1, 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 · Oct 1, 2026 · View company records in RevenueBase
10Exact matchKettering, United KingdomHQ recorded Oct 1, 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 · Oct 1, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Oct 1, 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 · Oct 1, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Oct 1, 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 · Oct 1, 2026 · View company records in RevenueBase
13Exact matchCirencester, United KingdomHQ recorded Oct 1, 20261-1030 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14Exact matchSheffield, United KingdomHQ recorded Oct 1, 202611-5029 contacts →

Exact match

“Here at Kinspeed we pride ourselves in being one of the longest standing Sage Business Partners in the UK, having worked with Sage for over 35 years.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-5026 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
16Exact matchNewcastle Upon Tyne, United KingdomHQ recorded Oct 1, 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 · Oct 1, 2026 · View company records in RevenueBase
17Exact matchBellshill, United KingdomHQ recorded Oct 1, 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 · Oct 1, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-5022 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19Exact matchLeeds, United KingdomHQ recorded Oct 1, 202611-5018 contacts →

Exact match

“Cindercone provide integration software and services.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20Exact matchUnited KingdomHQ recorded Oct 1, 202611-5017 contacts →

Exact match

“Inixion is a specialist Sage partner delivering 100% project success since 2006.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
21Exact matchBristol, United KingdomHQ recorded Oct 1, 202651-20017 contacts →

Exact match

“Welcome to bluQube - a better way to manage finance effectively.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-5016 contacts →

Exact match

“Mayday mends month end for in-house finance teams at complex businesses scaling with Xero or Quickbooks Online as their core accounting system, including those managing multiple…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
23Exact matchStafford, United KingdomHQ recorded Oct 1, 202611-5015 contacts →

Exact match

“Grow your profits and make your business better with Outserve.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-5015 contacts →

Exact match

“Translucent is the AI platform built for accountants, bookkeepers and finance teams.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
25Exact matchManchester, United KingdomHQ recorded Oct 1, 202611-5012 contacts →

Exact match

“Aedon.Accounting is a game-changer.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase

Showing 25 of 107 accounting integration software companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 779 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Accounting integration software companies based in the United Kingdom at a glance

As of Oct 1, 2026
51.1%Verified-email coverage
14.2Average contacts per company
1-10Median size (employees)
27.1%Largest-city concentration · London
Oct 1, 2026Page data refreshed

Companies by employee count

1-10
56
11-50
35
51-200
12
201-500
2
501-1,000
1
1,001-5,000
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 107 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 integration 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 779 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 October 1, 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 integration 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 integration software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 107 company matches for accounting integration software companies associated with the United Kingdom as of October 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 integration software companies?

London leads with 29 company records, followed by Bristol (4) and Newcastle Upon Tyne (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 779 professional contacts with verified work emails tracked across these 107 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 October 1, 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.