Company lists · Data verified August 2026

Top 25 CRM api developers based in the United Kingdom

Name: CRM api 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 378 companies tracked

There are 378 CRM api developers headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 88,130 professional contacts across them, including 59,004 with verified work emails and 28,131 with mobile numbers. London is the largest hub.

This list covers CRM api 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.

378Companies

88,130Contacts tracked

59,004Verified emails

28,131Mobile numbers

Unlock all 378 companies Free account · no credit card · 2 minutes

The 25 largest CRM api developers based in the United Kingdom

Ranked by team size

Top 25 of 378 CRM api 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	Cynoteck Technology Solutions	London	201-500	194	101
3	Cloudcentric Infotech INC	London	51-200	111	76
4	Acteol	London	51-200	83	51
5	Cloud Orca	London	51-200	74	43
6	Magicfuse By Techmagic	London	51-200	72	1
7	Workbooks CRM	Reading	51-200	63	44
8	Capsule	Manchester	11-50	56	30
9	Optimiser	London	51-200	56	10
10	Armadillo	Bristol	51-200	48	24
11	Nebula Consulting	London	11-50	34	20
12	TENGO	London	11-50	34	8
13	WORO	n/a	51-200	32	1
14	Performa	Stonehouse	51-200	29	13
15	makedigital.co.uk	Chelmsford	11-50	18	8
16	Preact	Manchester	51-200	18	7
17	Zumzum	Stockport	11-50	18	6
18	Skyla Software Solution PVT LTD	London	11-50	15	5
19	Akarigo	London	11-50	13	7
20	Icefyre Solutions	London	11-50	12	6
21	Signals LTD	Henlow	11-50	11	5
22	Brightoffice	Preston	11-50	11	2
23	Apptituda	Kenilworth	11-50	9	5
24	Buddycrm	Walsall	11-50	9	5
25	Synchronicity Technology Solutions LTD	Oxford	11-50	7	6

Showing 25 of 378 CRM api developers based in the United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 59,004 reachable decision-makers.

Free account · no credit card

See all 378 companies

CRM api developers based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 127 HQs

28,131Contacts with mobile numbers

127Emails re-verified in last 30 days

Companies by employee count

1-10

240

11-50

107

51-200

201-500

10001+

CRM api developers by metro

Metro	Companies
CRM api developers in London	127
CRM api developers in Manchester	11
CRM api developers in Leeds	7
CRM api developers in Reading	7
CRM api developers in Birmingham	6
CRM api developers in Bristol	6
CRM api developers in Hayes	3

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 “CRM api 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; 127 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 CRM api developers are there based in the United Kingdom?

There are 378 CRM api 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 CRM api developers?

London leads with 127 headquartered companies, followed by Manchester (11) and Leeds (7).

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 59,004 verified decision-maker contacts tracked across these 378 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.

Ready to reach these companies? Verified emails and direct dials for all 378 CRM api developers based in the United Kingdom. Start with a free account, no credit card.

Get the full list

Related lists

CRM api developers by geography

Browse the directory

Browse: Companies home · All United Kingdom lists · All CRM api developers lists · New lists

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.