Company lists · Data refreshed August 2026
Top 25 Accounting integration software companies based in the United Kingdom
RevenueBase identified 107 accounting integration software companies headquartered in the United Kingdom as of August 2026 and tracks 1,234 professional contacts across them, including 494 with verified work emails and 72 with mobile numbers. London is the largest hub.
This list covers accounting integration software 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, how directly it supports the match, and when it was last checked. Data refreshed August 30, 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.
The 25 largest accounting integration software companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 217 | ||||
“As part of Trintech, the Adra suite of solutions automate the financial close process.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 2 | 105 | ||||
“The complete tax and accountancy practice software suite, powered by a single database.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 3 | 61 | ||||
“We help businesses do more than just balance the books.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 4 | 61 | ||||
“We help organisations get more from Sage business software.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 5 | 44 | ||||
“IRIS is a long-established industry leader in accounting software and services for accountants and bookkeepers.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 6 | 43 | ||||
“Big enough for best-in-class support but small enough for your undivided attention, itas invests in your long-term success.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 7 | 42 | ||||
“ION implements cloud accounting solutions into Education, high-growth and PE-backed organisations.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 8 | 41 | ||||
“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: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 9 | 34 | ||||
“At Acting Office we deliver a fully integrated software platform designed for modern accountancy practices that want precision, efficiency and complete visibility across their…” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 10 | 30 | ||||
“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.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 11 | 30 | ||||
“Ember is a specialist accounting and tax software platform and was acquired by Starling Bank in 2025.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 12 | 26 | ||||
“Cloud-native finance and accounting software for multi-entity and multi-currency organisations.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 13 | 25 | ||||
“Zynk is one of leading Integration Platform as a Service providers specializing in accounting data integration.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 14 | 24 | ||||
“ExcluServ is a private limited company, offering consultancy, software and accounting support to small to medium companies and NFP organisations.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 15 | 23 | ||||
“Founded in 1982, Castle Computer Services provides accounting and financial management software, business intelligence solutions, cloud and managed IT services throughout the UK…” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 16 | 21 | ||||
“A leading Sage X3 and Sage Intacct Business Partner.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 17 | 18 | ||||
“Cindercone provide integration software and services.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 18 | 17 | ||||
“Inixion is a specialist Sage partner delivering 100% project success since 2006.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 19 | 17 | ||||
“Welcome to bluQube - a better way to manage finance effectively.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 20 | 16 | ||||
“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…” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 21 | 15 | ||||
“Grow your profits and make your business better with Outserve.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 22 | 12 | ||||
“Aedon.Accounting is a game-changer.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 23 | Redfish Systems LimitedPartial evidence | 10 | |||
“Innovative software solutions; enhancing business performance At Redfish, our mission is to provide innovative software solutions that support a customer’s business objectives…” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 24 | 10 | ||||
“When you absolutely don't want to pay a small fortune for your finance/accounting or ERP solutions, it's time to get in touch.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 25 | 9 | ||||
“Welcome to SoMax Finance – your trusted partner for cutting-edge cloud accounting solutions.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 107 accounting integration software companies based in the United Kingdom
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Accounting integration software companies based in the United Kingdom at a glance
As of Aug 30, 2026Companies by employee count
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 integration software companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 integration software companies”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among accounting integration software 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 an evidence 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, 494 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 August 30, 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 integration software companies by metro
Frequently asked
How many accounting integration software companies are there based in the United Kingdom?
RevenueBase identified 107 accounting integration software companies headquartered in the United Kingdom as of August 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?
ADRA, headquartered in London, tops this list with the largest team on record.
Which city has the most accounting integration software companies?
London leads with 28 headquartered companies, followed by Newcastle Upon Tyne (3) and Bristol (3).
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 494 verified decision-maker contacts tracked across these 107 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 30, 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.
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