Company lists · Data verified August 2026

Top 25 Data consulting firms based in the United Kingdom

Name: Data consulting firms 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 1,257 companies tracked

There are 1,257 data consulting firms headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 12,233 professional contacts across them, including 4,740 with verified work emails and 808 with mobile numbers. London is the largest hub.

This list covers data consulting firms 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.

1,257Companies

12,233Contacts tracked

4,740Verified emails

808Mobile numbers

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The 25 largest data consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 1,257 data consulting firms 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	Smartstream	Bristol	1,001-5,000	1,095	603
2	First Derivative	Newry	1,001-5,000	1,022	525
3	The Smart Cube	London	501-1,000	717	239
4	NEPA	London	201-500	307	134
5	Seargin	London	501-1,000	275	188
6	4most	London	201-500	271	182
7	Innova-Tsn	London	201-500	271	40
8	Vcreatek Consulting	Cardiff	201-500	245	64
9	Thorogood	London	201-500	228	36
10	The Information LAB	London	51-200	202	102
11	ELAIT	London	51-200	186	81
12	Cloudsmiths	London	51-200	150	8
13	Calligo	Leicester	201-500	111	68
14	Amber Labs	London	51-200	111	52
15	Oakland Everything Data	London	51-200	95	37
16	Groupbwt	London	51-200	92	7
17	Singulier	London	51-200	79	50
18	Tecknoworks	London	51-200	79	42
19	2cv	London	51-200	75	40
20	Bigspark	Nottingham	51-200	67	43
21	Seriös Group	Newcastle Upon Tyne	51-200	64	45
22	Tekcor4	London	51-200	61	45
23	Marionete	London	51-200	53	26
24	Elevondata	London	51-200	52	38
25	QA Consulting	Berkshire	201-500	51	4

Showing 25 of 1,257 data consulting firms based in the United Kingdom

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Data consulting firms based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 570 HQs

808Contacts with mobile numbers

11Emails re-verified in last 30 days

Companies by employee count

1-10

896

11-50

254

51-200

201-500

501-1,000

1,001-5,000

Data consulting firms by metro

Metro	Companies
Data consulting firms in London	570
Data consulting firms in Manchester	45
Data consulting firms in Leeds	24
Data consulting firms in Edinburgh	19
Data consulting firms in Bristol	17
Data consulting firms in Reading	13
Data consulting firms in Birmingham	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 “data consulting firms”, 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; 11 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 data consulting firms are there based in the United Kingdom?

There are 1,257 data consulting firms headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Smartstream, headquartered in Bristol, tops this list with the largest team on record.

Which city has the most data consulting firms?

London leads with 570 headquartered companies, followed by Manchester (45) and Leeds (24).

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 4,740 verified decision-maker contacts tracked across these 1,257 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.