Company lists · Data refreshed September 2026

Top 25 Enterprise network consulting companies based in London, United Kingdom

Name: Enterprise network consulting companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 117 companies tracked

RevenueBase identified 117 enterprise network consulting companies headquartered in London, United Kingdom as of September 2026 and tracks 2,143 professional contacts across them, including 1,255 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers enterprise network consulting companies headquartered in London, United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

117Companies

2,143Contacts tracked

1,255Verified emails

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The 25 largest enterprise network consulting companies based in London, United Kingdom

Ranked by team size

Top 25 of 117 enterprise network consulting companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise network consulting companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Exponential-E	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	667 contacts →
	Indirect evidence “Innovation is at the core of Exponential-e, and has been since our inception in 2002.” Source: RevenueBase Database · checked Sep 28, 2026
2	Zenzero	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	401 contacts →
	Indirect evidence “We believe successful businesses are underpinned by quality IT infrastructure.” Source: RevenueBase Database · checked Sep 28, 2026
3	Maintel	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	341 contacts →
	Indirect evidence “Maintel is a communications managed services provider.” Source: RevenueBase Database · checked Sep 28, 2026
4	Caretower An Integrity360 Company	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	97 contacts →
	Indirect evidence “As an independent IT security specialist, Caretower provide comprehensive solutions to individual problems, thus allowing our recommendations to be unbiased.” Source: RevenueBase Database · checked Sep 28, 2026
5	Sytel Reply	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	68 contacts →
	Partial evidence “Sytel Reply is the Reply Company focused on Networks and Security.” Source: RevenueBase Database · checked Sep 28, 2026
6	Insoft Services	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	60 contacts →
	Partial evidence “Insoft Services specializes in elevating IT infrastructure resilience and security, focusing on the critical domains of IT networking, data center infrastructure, cybersecurity…” Source: RevenueBase Database · checked Sep 28, 2026
7	Electranet UK Limited	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	49 contacts →
	Indirect evidence “Electranet’s mission is to be a preferred partner to the public and private sectors, bringing competitively priced, secure and innovative solutions to the market.” Source: RevenueBase Database · checked Sep 28, 2026
8	Borwood	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	43 contacts →
	Indirect evidence “At Borwood, we believe that seamless, always-on communication is the foundation of global business success.” Source: RevenueBase Database · checked Sep 28, 2026
9	Infrastructure Design Solutions	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	24 contacts →
	Indirect evidence “IDS is a global ICT and security infrastructure design consultancy, specialized in structured cabling design and physical security engineering solutions that meet the highest…” Source: RevenueBase Database · checked Sep 28, 2026
10	Formation Tech	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	22 contacts →
	Partial evidence “Specialsing in cybersecurity, networks, voice and video, we're on a mission to transform workspaces and deliver exceptional outcomes for our clients.” Source: RevenueBase Database · checked Sep 28, 2026
11	C-Serv	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	20 contacts →
	Strong evidence “At C-Serv, we partner with technology leaders building world-class solutions across networking, cloud, cybersecurity, and AI-delivering expert teams and consulting support in 50+…” Source: RevenueBase Database · checked Sep 28, 2026
12	NGS Next Generation Security	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	20 contacts →
	Indirect evidence “Formed in 2018, NGS (UK) Ltd are independent, Next Generation Security trusted advisors, providing all-encompassing solutions from the perimeter to the endpoint.” Source: RevenueBase Database · checked Sep 28, 2026
13	H3o Digital	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	17 contacts →
	Partial evidence “H3O Digital provides enterprise class technical services for businesses of all sizes.” Source: RevenueBase Database · checked Sep 28, 2026
14	Vits LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	16 contacts →
	Indirect evidence “Your Trusted Partner in Cybersecurity & 360 IT Support Founded in 2004, VITS has built a reputation for protecting businesses across the globe with robust, responsive, and…” Source: RevenueBase Database · checked Sep 28, 2026
15	GTP Works	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “GTP Works strives to be the trusted connection to the networked works and is focused on delivering technology that enhances customer experience.” Source: RevenueBase Database · checked Sep 28, 2026
16	Sylversys	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	14 contacts →
	Partial evidence “SYLVERSYS is a solutions integration firm with a specialty in providing secure computer and network products/solutions for businesses and organizations in the private and public…” Source: RevenueBase Database · checked Sep 28, 2026
17	Starfish	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	10 contacts →
	Indirect evidence “Mission: The mission of Starfish is to develop technical expertise and share it openly for the benefit of our community.” Source: RevenueBase Database · checked Sep 28, 2026
18	Re-Solution	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	8 contacts →
	Partial evidence “Re-Solution Data Ltd is a London-based company specialising in Cisco technologies, focusing on security, networks, data centres, and cloud solutions.” Source: RevenueBase Database · checked Sep 28, 2026
19	Pentima	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	6 contacts →
	Indirect evidence “Pentima: Your Trusted Advisor in WAN & Telecommunications, Cloud & Security Solutions Pentima is a renowned consultancy specialising in the WAN & telecommunications, Cloud &…” Source: RevenueBase Database · checked Sep 28, 2026
20	Enable Network Services	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	5 contacts →
	Partial evidence “A team of highly trained network specialists dedicated to engineering the best solutions with state of the art technology.” Source: RevenueBase Database · checked Sep 28, 2026
21	Nisatec	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	5 contacts →
	Strong evidence “Nisa Tech provides ICT and network solutions to various enterprise markets.” Source: RevenueBase Database · checked Sep 28, 2026
22	Netconnection Systems, Part Of The Charterhouse Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	4 contacts →
	Indirect evidence “Charterhouse is your trusted technology partner - designing, provisioning and supporting the technology that underpins your operations.” Source: RevenueBase Database · checked Sep 28, 2026
23	Deltacanon	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “At DeltaCanon our mission is simple; To deliver industry leading Design & Build solutions for high spec ICT projects across the globe.” Source: RevenueBase Database · checked Sep 28, 2026
24	Infolearn Technologies	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Professional Services to leverage today's technology for tomorrow's enterprises.” Source: RevenueBase Database · checked Sep 28, 2026
25	Uk-Tec	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Building on an enviable wealth of experience in the creation and provision of security, network and cloud managed solutions, UK-tec offers a breadth of services to the UK channel…” Source: RevenueBase Database · checked Sep 28, 2026

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: enterprise network 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 enterprise network consulting companies.
Partial evidence: Its own public description names part of enterprise network consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise network 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 117 enterprise network consulting companies based in London, United Kingdom

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Enterprise network consulting companies based in London, United Kingdom at a glance

As of Sep 28, 2026

58.6%Verified-email coverage

18.3Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 117 companies.

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 enterprise network 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 “enterprise network 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 enterprise network 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 enterprise network 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, 1,255 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 September 28, 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.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its 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 the category the list is about. Each row is rated strong evidence when the company's own description names enterprise network consulting companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many enterprise network consulting companies are there based in London, United Kingdom?

RevenueBase identified 117 enterprise network consulting companies headquartered in London, United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Exponential-E, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most enterprise network consulting companies?

London leads the United Kingdom with 117 headquartered companies, followed by Leeds (8) and Manchester (8).

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 1,255 verified decision-maker contacts tracked across these 117 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

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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.