Company lists · Data verified August 2026

Top 25 Citizen developer platforms based in the United Kingdom

Name: Citizen developer platforms 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 77 companies tracked

There are 77 citizen developer platforms headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 1,191 professional contacts across them, including 481 with verified work emails and 265 with mobile numbers. London is the largest hub.

This list covers citizen developer platforms 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.

77Companies

1,191Contacts tracked

481Verified emails

265Mobile numbers

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The 25 largest citizen developer platforms based in the United Kingdom

Ranked by team size

Top 25 of 77 citizen developer platforms 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	Retool	London	201-500	429	196
2	Ultimus	London	201-500	131	47
3	Agile Labs	London	51-200	121	32
4	toca.io	Reading	11-50	28	19
5	Comunity	London	11-50	28	13
6	Excelpoint Limited	Newton Aycliffe	11-50	28	11
7	Batoi Systems	London	11-50	27	1
8	Softools	London	11-50	26	12
9	Fliplet	London	11-50	26	11
10	Comidor	London	11-50	20	9
11	Apptomator	London	11-50	19	3
12	Method Grid	Bath	11-50	16	15
13	Ebase Technology	Sandy	51-200	16	6
14	Stacker	London	11-50	15	11
15	Journey36	London	11-50	14	12
16	Cambridge Kinetics	Cambridge	11-50	14	10
17	CYZAG	London	11-50	12	6
18	Dittofi	Avon	1-10	12	4
19	Livecode	Edinburgh City	11-50	11	4
20	Anthill	Leeds	11-50	10	10
21	AIRPA	London	1-10	10	9
22	Aspenify	Malvern	11-50	8	6
23	Blue Wren	Preston	1-10	8	4
24	Zigaflow	London	1-10	7	5
25	HYPI	Croydon	11-50	5	1

Showing 25 of 77 citizen developer platforms based in the United Kingdom

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Citizen developer platforms based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 38 HQs

265Contacts with mobile numbers

3Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

Citizen developer platforms by metro

Metro	Companies
Citizen developer platforms in London	38
Citizen developer platforms in Reading	4
Citizen developer platforms in Leeds	3
Citizen developer platforms in Bristol	2
Citizen developer platforms in Bath	2
Citizen developer platforms in Malvern	1
Citizen developer platforms in Headquarters	1

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 “citizen developer platforms”, 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; 3 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 citizen developer platforms are there based in the United Kingdom?

There are 77 citizen developer platforms headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most citizen developer platforms?

London leads with 38 headquartered companies, followed by Reading (4) and Leeds (3).

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 481 verified decision-maker contacts tracked across these 77 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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Citizen developer platforms by geography

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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.