Company lists · Data verified August 2026

Top 25 Bookkeeping outsourcing companies based in London, United Kingdom

Name: Bookkeeping outsourcing companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 208 companies tracked

There are 208 bookkeeping outsourcing companies headquartered in London, United Kingdom (RevenueBase, August 2026). RevenueBase tracks 1,948 professional contacts across them, including 351 with verified work emails and 58 with mobile numbers. London is the largest hub.

This list covers bookkeeping outsourcing 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. Data current as of August 28, 2026.

208Companies

1,948Contacts tracked

351Verified emails

58Mobile numbers

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The 25 largest bookkeeping outsourcing companies based in London, United Kingdom

Ranked by team size

Top 25 of 208 bookkeeping outsourcing companies based in London, United Kingdom, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Outbooks	London	201-500	475	39
2	Obox Solution LTD	London	201-500	132	12
3	Initor Global UK	London	51-200	108	43
4	Affinity Outsourcing Limited	London	51-200	96	32
5	Sapphire Info Solutions P LTD	London	51-200	88	28
6	Stellaripe	London	51-200	57	40
7	Artifin Accountants	London	11-50	51	1
8	Complete Accounting Solutions	London	11-50	33	9
9	Bookcheck LTD	London	51-200	29	24
10	Accnet Solutions LTD	London	11-50	20	9
11	Excelsious	London	11-50	17	3
12	Asesa Solutions LTD	London	11-50	15	1
13	BM Connect Limited	London	11-50	14	10
14	Fresh Financials Group	London	11-50	12	8
15	CLIC	London	1-10	9	7
16	Jones & Partners	London	11-50	8	7
17	Naail & CO Chartered Certified Accountants	London	11-50	7	4
18	SJC Bookkeeping LTD	London	1-10	7	2
19	Accuco	London	11-50	6	5
20	Realtime Finance	London	1-10	5	5
21	Clearstone Business Services LTD	London	11-50	5	4
22	ASG Corp	London	11-50	5	3
23	Casa Bookkeeping	London	1-10	5	3
24	SH Accounting & Bookkeeping LTD	London	11-50	5	2
25	Xlpoint	London	11-50	4	3

Showing 25 of 208 bookkeeping outsourcing companies based in London, United Kingdom

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Bookkeeping outsourcing companies based in London, United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 231 HQs

58Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

143

11-50

51-200

201-500

501-1,000

1,001-5,000

Bookkeeping outsourcing companies by metro in the United Kingdom

Metro	Companies
Bookkeeping outsourcing companies in London	231
Bookkeeping outsourcing companies in Manchester	24
Bookkeeping outsourcing companies in Bristol	19
Bookkeeping outsourcing companies in Birmingham	15
Bookkeeping outsourcing companies in Glasgow	15
Bookkeeping outsourcing companies in Leicester	13
Bookkeeping outsourcing companies in Milton Keynes	12

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “bookkeeping outsourcing companies”, with match quality audited by blind human judging, and headquartered in London, United Kingdom.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many bookkeeping outsourcing companies are there based in London, United Kingdom?

There are 208 bookkeeping outsourcing companies headquartered in London, United Kingdom as of August 2026 (RevenueBase).

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 bookkeeping outsourcing companies?

London leads with 231 headquartered companies, followed by Manchester (24) and Bristol (19).

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 351 verified decision-maker contacts tracked across these 208 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.