Company lists · Data verified August 2026

Top 25 IT consulting companies based in London, United Kingdom

Name: IT consulting 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 1,952 companies tracked

As of August 2026, this directory lists 1,952 IT consulting companies based in London, United Kingdom, with 89,969 contacts and 18,939 email addresses. London is the single most-represented city among the companies on the list. Use the directory to identify potential vendors, partners, and sales prospects.

IT consulting companies advise organizations on technology strategy, systems, software, infrastructure, cybersecurity, cloud services, and related IT implementation needs. This list covers companies that provide professional IT consulting services, including technology advisory, systems planning, implementation support, and related services. Ranked by team size, largest first. Data current as of August 28, 2026.

1,952Companies

89,969Contacts tracked

18,939Verified emails

6,225Mobile numbers

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The 25 largest IT consulting companies based in London, United Kingdom

Ranked by team size

Top 25 of 1,952 IT consulting 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	Mphasis	London	10001+	43,740	6,968
2	ITC Infotech	London	10001+	16,896	4,111
3	Gspann Technologies, INC	London	1,001-5,000	1,874	754
4	Zühlke Group	London	1,001-5,000	1,580	909
5	Radical Minds Technologies Pvt. LTD	London	1,001-5,000	1,557	4
6	Miratech	London	1,001-5,000	982	352
7	Advania UK	London	1,001-5,000	905	5
8	Silverlink Technologies	London	201-500	677	115
9	Ahana Systems And Solutions Pvt. LTD	London	501-1,000	645	183
10	Alten LTD - UK	London	10001+	542	198
11	Impressico Business Solutions	London	501-1,000	523	228
12	NOBLQ	London	1,001-5,000	468	52
13	Leader Investment Group - LIG	London	501-1,000	452	42
14	Sandhata Technologies	London	201-500	365	141
15	Qvest Global	London	1,001-5,000	356	102
16	Winfo Solutions	London	201-500	355	163
17	Bechtle UK	London	201-500	282	145
18	Seargin	London	501-1,000	275	188
19	V R Della Infotech Inc- V R Della Group	London	501-1,000	253	46
20	Eligarf Technologies	London	201-500	214	75
21	Vervint	London	201-500	189	88
22	Ibridge, LLC	London	501-1,000	183	35
23	Data Market	London	201-500	170	80
24	Tesselate	London	201-500	157	101
25	Baseel Partners	London	1,001-5,000	78	26

Showing 25 of 1,952 IT consulting companies based in London, United Kingdom

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IT consulting companies based in London, United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 2456 HQs

6,225Contacts with mobile numbers

103Emails re-verified in last 30 days

Companies by employee count

1-10

1,129

11-50

517

51-200

191

201-500

501-1,000

1,001-5,000

10001+

IT consulting companies by metro in the United Kingdom

Metro	Companies
IT consulting companies in London	2456
IT consulting companies in Manchester	176
IT consulting companies in Birmingham	115
IT consulting companies in Bristol	95
IT consulting companies in Leeds	77
IT consulting companies in Reading	76
IT consulting companies in Glasgow	63

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 “IT consulting 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; 103 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 IT consulting companies are in the directory?

The directory contains 1,952 IT consulting companies based in London, United Kingdom as of August 2026.

How can I find contacts at IT consulting companies?

You can use this directory to review 89,969 contacts and 18,939 email addresses associated with IT consulting companies based in London, United Kingdom.

Which city has the most IT consulting companies on the list?

London is the single most-represented city among the IT consulting companies on the list.

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IT consulting companies 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.