Company lists · Data refreshed November 2026

Top 25 Custom accounting software developers based in the United Kingdom

Name: Custom accounting software developers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 710 companies tracked

RevenueBase identified 710 company matches for custom accounting software developers associated with the United Kingdom as of November 2026 and tracks 3,363 professional contacts across them, including 1,299 with verified work emails. London is the largest hub.

This list covers company matches for custom accounting software developers 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 November 5, 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 Nov 5, 2026 How this list was built

710Companies

3,363Contacts tracked

1,299Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest custom accounting software developers based in the United Kingdom

Ranked by team size

Top 25 of 710 company matches for custom accounting software developers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Freeagent	Exact match	Edinburgh, United KingdomHQ recorded Nov 5, 2026	51-200	336 contacts →
	Exact match “One product.🤳 17 years.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2	Crunch	Exact match	Hove, United KingdomHQ recorded Nov 5, 2026	51-200	126 contacts →
	Exact match “We provide accounting software, services & solutions that have a big impact on small UK businesses.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3	Taxcalc	Exact match	Wokingham, United KingdomHQ recorded Nov 5, 2026	51-200	110 contacts →
	Exact match “The complete tax and accountancy practice software suite, powered by a single database.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4	kpi.com	Exact match	London, United KingdomHQ recorded Nov 5, 2026	51-200	89 contacts →
	Exact match “KPI is an all-in-one business solution providing: Accounting, Payroll, Sales, Human Resources, Project Management, Report and Document applications all in one platform according…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5	NOMI	Exact match	London, United KingdomHQ recorded Nov 5, 2026	11-50	66 contacts →
	Exact match “Nomi is the ultimate cloud accounting suite built for accountants and bookkeepers.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6	DSL Accounting	Exact match	Leamington Spa, United KingdomHQ recorded Nov 5, 2026	n/a	58 contacts →
	Exact match “DSL is one of the UK's leading small business accountancy firms, helping businesses grow since 1997.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7	Ascendant	Exact match	London, United KingdomHQ recorded Nov 5, 2026	201-500	52 contacts →
	Exact match “Accounting.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8	Acting Office	Exact match	London, United KingdomHQ recorded Nov 5, 2026	51-200	50 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 · Nov 5, 2026 · View company records in RevenueBase
9	Iris Accountancy	Exact match	Slough, United KingdomHQ recorded Nov 5, 2026	1,001-5,000	43 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 · Nov 5, 2026 · View company records in RevenueBase
10	ION	Exact match	Newcastle Upon Tyne, United KingdomHQ recorded Nov 5, 2026	11-50	41 contacts →
	Exact match “ION implements cloud accounting solutions into Education, high-growth and PE-backed organisations.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11	Pegasus Software	Exact match	Kettering, United KingdomHQ recorded Nov 5, 2026	51-200	41 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 · Nov 5, 2026 · View company records in RevenueBase
12	Complete Accounting Solutions	Exact match	London, United KingdomHQ recorded Nov 5, 2026	11-50	38 contacts →
	Exact match “Complete Accounting Solutions is a firm of dedicated individuals focussed on providing small and growing companies with support on the accounts and bookkeeping activities of their…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13	Finex Accounting	Exact match	Manchester, United KingdomHQ recorded Nov 5, 2026	51-200	33 contacts →
	Exact match “Finex Accounting is an outsourcing accountancy service provider.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14	Bookcheck LTD	Exact match	London, United KingdomHQ recorded Nov 5, 2026	51-200	32 contacts →
	Exact match “Our clients rely on us to remove book-keeping hassle and improve their profitability by using our top quality financial reports based on professionally reconciled book-keeping.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15	Castle Computer Services	Exact match	Bellshill, United KingdomHQ recorded Nov 5, 2026	51-200	30 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 · Nov 5, 2026 · View company records in RevenueBase
16	Accounts ETC	Exact match	Cirencester, United KingdomHQ recorded Nov 5, 2026	1-10	30 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 · Nov 5, 2026 · View company records in RevenueBase
17	Adams Moore Accountants	Exact match	Tamworth, United KingdomHQ recorded Nov 5, 2026	11-50	21 contacts →
	Exact match “As experienced accountants and business advisers with forward-thinking attitudes and a passion for achieving your business goals, we offer a personalised service akin to you…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18	Ookkee	Exact match	Poole, United KingdomHQ recorded Nov 5, 2026	11-50	21 contacts →
	Exact match “At Ookkee we are aiming to get business owners back in touch with the numbers.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19	Accnet Solutions LTD	Exact match	London, United KingdomHQ recorded Nov 5, 2026	11-50	21 contacts →
	Exact match “AccNet Solutions was formed in November 2010 by Damitha Ukuwela as a firm providing accounting and bookkeeping solutions.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20	Virgate Your Dynamic Accounts Team	Exact match	Gloucester, United KingdomHQ recorded Nov 5, 2026	11-50	18 contacts →
	Exact match “Outsourcing accounts is no longer just for big business.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21	Outserve	Exact match	Stafford, United KingdomHQ recorded Nov 5, 2026	11-50	17 contacts →
	Exact match “Grow your profits and make your business better with Outserve.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22	Cogs Accountancy Services	Exact match	Windsor, United KingdomHQ recorded Nov 5, 2026	11-50	17 contacts →
	Exact match “For each and every client we create an individually tailored accountancy package.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23	Bluqube Accounting Software	Exact match	Bristol, United KingdomHQ recorded Nov 5, 2026	51-200	17 contacts →
	Exact match “Welcome to bluQube - a better way to manage finance effectively.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24	EMBER	Exact match	London, United KingdomHQ recorded Nov 5, 2026	11-50	17 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 · Nov 5, 2026 · View company records in RevenueBase
25	Clear Books	Exact match	West Kensington, United KingdomHQ recorded Nov 5, 2026	11-50	16 contacts →
	Exact match “Clear Books is a small business supporting small businesses.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “custom accounting software developers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 710 custom accounting software developers based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,299 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Custom accounting software developers based in the United Kingdom at a glance

As of Nov 5, 2026

38.6%Verified-email coverage

4.7Average contacts per company

1-10Median size (employees)

17.9%Largest-city concentration · London

Nov 5, 2026Page data refreshed

Companies by employee count

1-10

565

11-50

101

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 710 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 “custom accounting software developers” 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 1,299 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 November 5, 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.

Custom accounting software developers by metro

Custom accounting software developers in London127

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

How many custom accounting software developers are there based in the United Kingdom?

RevenueBase identified 710 company matches for custom accounting software developers associated with the United Kingdom as of November 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?

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

Which city has the most custom accounting software developers?

London leads with 127 company records, followed by Manchester (13) and Bristol (12).

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 1,299 professional contacts with verified work emails tracked across these 710 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 November 5, 2026.

Ready to reach these companies? Verified emails and direct dials for all 710 custom accounting software developers based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Custom accounting software developers by geography

Browse the directory

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.