Company lists · Data verified August 2026

Top 25 Custom CRM software developers based in the United Kingdom

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 334 companies tracked

There are 334 custom CRM software developers headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 87,423 professional contacts across them, including 58,684 with verified work emails and 28,077 with mobile numbers. London is the largest hub.

This list covers custom CRM software developers headquartered in the 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.

334Companies

87,423Contacts tracked

58,684Verified emails

28,077Mobile numbers

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

Ranked by team size

Top 25 of 334 custom CRM software developers based in the 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	Salesforce	London	10001+	85,557	58,153
2	Emailclub	London	51-200	103	39
3	Workbooks CRM	Reading	51-200	63	44
4	Capsule	Manchester	11-50	56	30
5	Optimiser	London	51-200	56	10
6	Armadillo	Bristol	51-200	48	24
7	Selecta SOL	Manchester	51-200	47	1
8	Aspin B2B Ecommerce & CRM Catalogue Ordering APP	Romsey	11-50	37	27
9	Saqaya	London	51-200	36	13
10	WORO	n/a	51-200	32	1
11	Spotdev	Bath	11-50	24	15
12	Flowbird LTD	Ashford	11-50	21	12
13	Avrion	Stevenage	11-50	16	13
14	Robosme	London	11-50	14	7
15	Akarigo	London	11-50	13	7
16	Greenhouse OS	York	11-50	13	6
17	Opencrm	Richmond	11-50	12	8
18	Hoge 100 Business Systems LTD	Worcester	11-50	11	8
19	Signals LTD	Henlow	11-50	11	5
20	Brightoffice	Preston	11-50	11	2
21	Kms-Software	n/a	11-50	10	10
22	First Option Software	Alresford	11-50	9	7
23	Repforce	London	11-50	8	5
24	Pulse Business Software	Malmesbury	11-50	8	4
25	CRM Champion	Plymouth	11-50	7	1

Showing 25 of 334 custom CRM software developers based in the United Kingdom

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

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 96 HQs

28,077Contacts with mobile numbers

126Emails re-verified in last 30 days

Companies by employee count

1-10

219

11-50

51-200

201-500

501-1,000

5,001-10,000

10001+

Custom CRM software developers by metro

Metro	Companies
Custom CRM software developers in London	96
Custom CRM software developers in Manchester	10
Custom CRM software developers in Leeds	6
Custom CRM software developers in Birmingham	4
Custom CRM software developers in Bournemouth	4
Custom CRM software developers in Reading	4
Custom CRM software developers in Solihull	4

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 “custom CRM software developers”, with match quality audited by blind human judging, and headquartered in the 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; 126 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 custom CRM software developers are there based in the United Kingdom?

There are 334 custom CRM software developers headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most custom CRM software developers?

London leads with 96 headquartered companies, followed by Manchester (10) and Leeds (6).

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 58,684 verified decision-maker contacts tracked across these 334 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.