Company lists · Data refreshed September 2026

Top 25 Enterprise connectivity advisors based in London, United Kingdom

Name: Enterprise connectivity advisors 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 96 companies tracked

RevenueBase identified 96 enterprise connectivity advisors headquartered in London, United Kingdom as of September 2026 and tracks 1,849 professional contacts across them, including 1,144 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers enterprise connectivity advisors 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

96Companies

1,849Contacts tracked

1,144Verified emails

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The 25 largest enterprise connectivity advisors based in London, United Kingdom

Ranked by team size

Top 25 of 96 enterprise connectivity advisors 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 connectivity advisors: 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	Sytel Reply	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	68 contacts →
	Indirect evidence “Sytel Reply is the Reply Company focused on Networks and Security.” Source: RevenueBase Database · checked Sep 28, 2026
5	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
6	Neutrality Managed Services	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial evidence “Neutrality are a service provider, delivering managed infrastructure services and hybrid connectivity solutions to our global client base.” Source: RevenueBase Database · checked Sep 28, 2026
7	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
8	GTP Works	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect 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
9	CSL Integration LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	8 contacts →
	Indirect evidence “Who we are - Established in 2004 CSL Integration is a technology solutions Company providing tailored voice, data and video services that add value and improve the way Companies…” Source: RevenueBase Database · checked Sep 28, 2026
10	Pentima	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	6 contacts →
	Partial 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
11	Enable Network Services	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	5 contacts →
	Indirect 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
12	Nisatec	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “Nisa Tech provides ICT and network solutions to various enterprise markets.” Source: RevenueBase Database · checked Sep 28, 2026
13	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
14	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
15	I15 Limited	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “i15 is a consultancy, and solutions partner, founded by a dedicated group of IT professionals with a collective 80+ year track record of successfully designing, engineering…” Source: RevenueBase Database · checked Sep 28, 2026
16	Zymbian	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Zymbian is a technology consultancy specialising in the design, management and delivery of IT infrastructure solutions both in the traditional datacentre and on cloud platforms.” Source: RevenueBase Database · checked Sep 28, 2026
17	Astro Technology Group LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	3 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
18	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
19	Greatlink Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	2 contacts →
	Indirect evidence “We help, guide, support and inspire organisations to take control of their technology and information systems.” Source: RevenueBase Database · checked Sep 28, 2026
20	Technology Moves	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “We provide specialist IT Infrastructure Consultancy and Project Management Services to our Clients.” Source: RevenueBase Database · checked Sep 28, 2026
21	GIR Consulting LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “A network consultancy company providing expert services in Wireless, LAN and Security networking.” Source: RevenueBase Database · checked Sep 28, 2026
22	Aingaran Consulting	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “Aingaran Consulting is a London based Consulting Firm that has been delivering Strategy, Architecture and Delivery consulting solutions to clients since 2011.” Source: RevenueBase Database · checked Sep 28, 2026
23	Liteworks	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “Building a network?” Source: RevenueBase Database · checked Sep 28, 2026
24	Xo-Networks	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “Our passion to produce the best work and experience for our customers is behind everything we do at XO.” Source: RevenueBase Database · checked Sep 28, 2026
25	Syllogistic Consulting Limited	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “Started in 2013, we have give smaller companies access to the same enterprise services that usually only larger companies have access to.” 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 connectivity advisors. 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 connectivity advisors.
Partial evidence: Its own public description names part of enterprise connectivity advisors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise connectivity advisors. 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 96 enterprise connectivity advisors based in London, United Kingdom

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Enterprise connectivity advisors based in London, United Kingdom at a glance

As of Sep 28, 2026

61.9%Verified-email coverage

19.3Average 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 96 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 connectivity advisors, 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 connectivity advisors”. 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 connectivity advisors), 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 connectivity advisors, 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, 1,144 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 connectivity advisors, 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 connectivity advisors are there based in London, United Kingdom?

RevenueBase identified 96 enterprise connectivity advisors 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 connectivity advisors?

London leads the United Kingdom with 96 headquartered companies, followed by Manchester (8) and Birmingham (6).

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 1,144 verified decision-maker contacts tracked across these 96 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.