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Company lists · Data refreshed August 2026

Top 25 Accounting and bookkeeping software companies based in London, United Kingdom

Compiled by the RevenueBase Data Team Data refreshed Aug 30, 2026 134 companies tracked

RevenueBase identified 134 accounting and bookkeeping software companies headquartered in London, United Kingdom as of August 2026 and tracks 1,643 professional contacts across them, including 494 with verified work emails and 82 with mobile numbers. London is the largest hub.

This list covers accounting and bookkeeping software companies headquartered in London, 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.

How to read this list Match evidence on every row Refreshed Aug 30, 2026 86% judged on-target in blind review
134Companies
1,643Contacts tracked
494Verified emails
82Mobile numbers
Explore all 134 companies → Free signup · no credit card · 500 free credits

The 25 largest accounting and bookkeeping software companies based in London, United Kingdom

Ranked by team size
Top 25 of 134 accounting and bookkeeping software companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Aug 30, 2026. Evidence rates how directly each company's own description names accounting and bookkeeping software companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
OutbooksStrong evidence
London, United Kingdom201-500475

“Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.”

Source: company website · checked Aug 30, 2026
2
DEXTPartial evidence
London, United Kingdom201-500388

“Say hello to Dext, the advanced bookkeeping automation platform that eliminates much of the manual work that slows you down.”

Source: company website · checked Aug 30, 2026
3
DebitamStrong evidence
London, United Kingdom51-200103

“Online Accounting Service | Bookkeeping | Payroll | Personal Tax Return Filing to HMRC | Corporation Tax Filing | HMRC ONLINE FILING: Our aim is to help small business owners` tax…”

Source: company website · checked Aug 30, 2026
4
CapiumStrong evidence
London, United Kingdom11-5081

“Capium is an online accounting & practice management software, tailored specifically for accounting practices.”

Source: company website · checked Aug 30, 2026
5
NOMIPartial evidence
London, United Kingdom11-5061

“Nomi is the ultimate cloud accounting suite built for accountants and bookkeepers.”

Source: company website · checked Aug 30, 2026
6
Jump AccountingPartial evidence
London, United Kingdom51-20034

“Accounting for Startups.”

Source: company website · checked Aug 30, 2026
7
Acting OfficePartial evidence
London, United Kingdom51-20034

“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, 2026
8
Complete Accounting SolutionsStrong evidence
London, United Kingdom11-5033

“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…”

Source: company website · checked Aug 30, 2026
9
EMBERStrong evidence
London, United Kingdom11-5030

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

Source: company website · checked Aug 30, 2026
10
Bookcheck LTDIndirect evidence
London, United Kingdom51-20029

“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.”

Source: company website · checked Aug 30, 2026
11
AdditionIndirect evidence
London, United Kingdom11-5027

“At Addition Finance, we're revolutionising the landscape of business finance on a global scale.”

Source: company website · checked Aug 30, 2026
12
AffotaxStrong evidence
London, United Kingdom11-5022

“Simplified Online Accounting | Customized Bookkeeping | Expert Payroll Services Making Finances Easier: Welcome to AffoTax.com, where we're changing how small businesses handle…”

Source: company website · checked Aug 30, 2026
13
Accnet Solutions LTDStrong evidence
London, United Kingdom11-5020

“AccNet Solutions was formed in November 2010 by Damitha Ukuwela as a firm providing accounting and bookkeeping solutions.”

Source: company website · checked Aug 30, 2026
14
AccountaxpertPartial evidence
London, United Kingdom11-5020

“Accountaxpert: Fueling SME Growth Through Smart Accounting Solutions About: Backed by over 15 years of experience, Accountaxpert is on a mission to revolutionize accounting for…”

Source: company website · checked Aug 30, 2026
15
Clear BooksIndirect evidence
London, United Kingdom11-5016

“Clear Books is a small business supporting small businesses.”

Source: company website · checked Aug 30, 2026
16
Obox Accounting LTDPartial evidence
London, United Kingdom11-5010

“OBOX ACCOUNTING LTD is a consumer services company based out of UNIT 8 DOCK OFFICES SURREY QUAYS ROAD, LONDON, United Kingdom.”

Source: company website · checked Aug 30, 2026
17
4pointzeroIndirect evidence
London, United Kingdom11-508

“4PointZero is an international technology and advisory company that specialises in the implementation of cloud-based accountancy services.”

Source: company website · checked Aug 30, 2026
18
Simply BookkeepingStrong evidence
London, United Kingdom1-108

“We offer cost effective bookkeeping, payroll and accounting service including: Online filing for VAT, PAYE, RTI and self assessment Final accounts preparation for audit For busy…”

Source: company website · checked Aug 30, 2026
19
ONKHOIndirect evidence
London, United Kingdom1-107

“Integrated workflow, CRM and email for accountants and bookkeepers.”

Source: company website · checked Aug 30, 2026
20
SJC Bookkeeping LTDPartial evidence
London, United Kingdom1-107

“SJC pride themselves on providing a superior and personalised approach to all your bookkeeping requirements.”

Source: company website · checked Aug 30, 2026
21
Realtime FinanceIndirect evidence
London, United Kingdom1-105

“RealTime Finance was founded in January 2017 by experienced CFOs, Bryan Lawrie and Kim Dovell who have worked with numerous businesses to transform the effectiveness and output of…”

Source: company website · checked Aug 30, 2026
22
Clearstone Business Services LTDIndirect evidence
London, United Kingdom11-505

“We help to provide business owners and their families with financial security and to enable them to have the lives that they want to lead, by helping them to grow their business…”

Source: company website · checked Aug 30, 2026
23
XlpointStrong evidence
London, United Kingdom11-504

“XLPoint, a registered company based in the United Kingdom (UK), specializes in delivering comprehensive bookkeeping and accounting outsourcing services tailored for businesses…”

Source: company website · checked Aug 30, 2026
24
Braant AccountingIndirect evidence
London, United Kingdom11-504

“Braant are a top ten rated firm of Certified Accountants and Bookkeepers.”

Source: company website · checked Aug 30, 2026
25
Best Bookkeeping LimitedStrong evidence
London, United Kingdom1-104

“BEST BOOKKEEPING is an outsourced accounting service based in London SW18, United Kingdom.”

Source: company website · checked Aug 30, 2026

Showing 25 of 134 accounting and bookkeeping software companies based in London, United Kingdom

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Accounting and bookkeeping software companies based in London, United Kingdom at a glance

As of Aug 30, 2026
1-10Median size (employees)
LondonLargest hub · 134 HQs
82Contacts with mobile numbers
Aug 30, 2026Data refreshed

Companies by employee count

1-10
92
11-50
32
51-200
5
201-500
3

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 and bookkeeping 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 London, United Kingdom whose own description of what they do matches “accounting and bookkeeping 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 and bookkeeping software companies, and records with no verified work email. Companies headquartered outside London 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 and bookkeeping software companies by metro in the United Kingdom

  • Accounting and bookkeeping software companies in London134

Frequently asked

How many accounting and bookkeeping software companies are there based in London, United Kingdom?

RevenueBase identified 134 accounting and bookkeeping software companies headquartered in London, 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?

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

Which city has the most accounting and bookkeeping software companies?

London leads with 134 headquartered companies, followed by Bristol (17) and Manchester (16).

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 134 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.

Ready to reach these companies? Verified emails and direct dials for all 134 accounting and bookkeeping software companies based in London, United Kingdom. Start with a free account, no credit card.

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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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