Company lists · Data refreshed August 2026
Top 25 IT consulting companies based in London, United Kingdom
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 31, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest IT consulting companies based in London, United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 43,740 contacts → | ||||
Indirect evidence “At Mphasis, engineering has been in our DNA since inception.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 2 | 16,896 contacts → | ||||
Indirect evidence “ITC Infotech is a global technology solution and services leader providing business-friendly solutions, that enable future-readiness for clients.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,874 contacts → | ||||
Partial evidence “GSPANN is a US-based consulting services provider focused on implementations in Enterprise Content Management (ECM), Business Intelligence & Mobile Solutioning initiatives.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,580 contacts → | ||||
Indirect evidence “Zühlke is a global transformation partner, with engineering and innovation in our DNA.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,557 contacts → | ||||
Indirect evidence “Radical Minds group leverages its highly qualified and experienced professionals at its offshore, near-shore and onshore locations to address our clients present challenges and…” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 6 | 982 contacts → | ||||
Indirect evidence “Miratech helps visionaries to change the world.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 7 | 905 contacts → | ||||
Indirect evidence “We empower people to create sustainable value with the clever use of technology.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 8 | 677 contacts → | ||||
Strong evidence “Silverlink Technologies, a software services company, part of the Silverlink Group, is a decade old global IT consulting and staffing services Company offering Information…” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 9 | 645 contacts → | ||||
Indirect evidence “Fifteen years ago, Ahana began with a simple belief: technology should enable growth, not create complexity.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 10 | 542 contacts → | ||||
Partial evidence “We are a leading Engineering and IT consultancy operating across all sectors in 30 different countries.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 11 | 523 contacts → | ||||
Partial evidence “Impressico Business Solutions, a CMMi Level 5 company is an IT services, digital solutions and outsourcing organization that delivers customized solutions to global businesses…” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 12 | 468 contacts → | ||||
Partial evidence “Noblq is a trusted global IT services partner that specializes in turning complex ERP, integration, and AI challenges into predictable business outcomes.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 13 | 452 contacts → | ||||
Partial evidence “Leader Investment Group is a MNC & a worldwide pioneer in Management Consultation, Executive Consultation, Digital Transformation & IT.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 14 | 365 contacts → | ||||
Indirect evidence “We are a global niche consultancy specialising in services that span all facets of Digital transformation, DevOps, and System Integration.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 15 | 356 contacts → | ||||
Indirect evidence “Qvest is a global leader in media-focused practices and services.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 16 | 355 contacts → | ||||
Indirect evidence “ABOUT WINFO SOLUTIONS Winfo is a digital transformation organization focused on embracing new technologies and has a vision for client-centric leadership.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 17 | 282 contacts → | ||||
Partial evidence “Bechtle is your strategic partner for IT consultancy, procurement and implementation.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 18 | 275 contacts → | ||||
Indirect evidence “Seargin was founded to close the gap between traditional advisory and hands-on delivery - combining strategic insight with deep expertise in ERP, AI and data.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 19 | 253 contacts → | ||||
Strong evidence “Della is a IT consulting and staffing firm focused on both IT and non IT needs of our customers.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 20 | 214 contacts → | ||||
Partial evidence “At eligarf, we transcend the boundaries of conventional IT services, crafting tailor-made solutions that catalyse your business ambitions.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 21 | 189 contacts → | ||||
Indirect evidence “At Vervint, our purpose is progress.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 22 | 183 contacts → | ||||
Indirect evidence “For over 16 years, iBridge has helped many organizations in the legal, healthcare, manufacturing, utilities, financial, and education industries apply the latest technologies to…” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 23 | 170 contacts → | ||||
Indirect evidence “About Us Being a solution provider and system integrator since 1992, Data Market which is one of the leading companies in information industry in Turkey is the information…” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 24 | 157 contacts → | ||||
Partial evidence “We’re a Digital Transformation Consultancy and Integrator formed from the strategic merger of the French company, Efficiency Management Consulting, and the Belgian company, Raven…” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
| 25 | 78 contacts → | ||||
Strong evidence “We offer a broad portfolio of IT and consulting services covering Governance and Strategy, Cloud, Data, Cybersecurity, Infrastructure and Applications, Managed IT and Security.” Source: RevenueBase Database · checked Aug 31, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: IT consulting companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names IT consulting companies.
- Partial evidence
- Its own public description names part of IT consulting companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name IT consulting companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
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 31, 2026Companies by employee count
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among IT consulting companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in London, United Kingdom whose own description of what they do matches “IT consulting companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names IT consulting companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among IT consulting companies, and records with no verified work email. Companies headquartered outside London are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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
- Every listed company carries at least one verified work email, 18,939 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on August 31, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
IT consulting companies by metro in the United Kingdom
- IT consulting companies in London2456
- IT consulting companies in Manchester176
- IT consulting companies in Birmingham115
- IT consulting companies in Bristol95
- IT consulting companies in Leeds77
- IT consulting companies in Reading76
- IT consulting companies in Glasgow63
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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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 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 with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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