Company lists · Data refreshed September 2026

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

Name: Enterprise telecom 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 12, 2026 199 companies tracked

RevenueBase identified 199 enterprise telecom consulting companies headquartered in London, United Kingdom as of September 2026 and tracks 2,851 professional contacts across them, including 1,241 with verified work emails and 234 with mobile numbers. London is the largest hub.

This list covers enterprise telecom 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 12, 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 12, 2026 86% judged on-target in blind review

199Companies

2,851Contacts tracked

1,241Verified emails

234Mobile numbers

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

Ranked by team size

Top 25 of 199 enterprise telecom consulting companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 12, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise telecom 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 12, 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 12, 2026
2	Maintel	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	201-500	341 contacts →
	Indirect evidence “Maintel is a communications managed services provider.” Source: RevenueBase Database · checked Sep 12, 2026
3	Cartesian	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	201-500	302 contacts →
	Strong evidence “Cartesian is a specialist consulting firm focused on the global telecommunications, media, and technology industries and is now part of Bounteous, an AI services firm helping…” Source: RevenueBase Database · checked Sep 12, 2026
4	Opticoreit	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	120 contacts →
	Indirect evidence “OpticoreIT is an IT Consultancy founded in 2013 to bridge a gap in the market between the major IT services providers and the consultancy market.” Source: RevenueBase Database · checked Sep 12, 2026
5	Mobile Systems International Msiuk	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	201-500	89 contacts →
	Partial evidence “32 years of excellence in delivering consultancy, solutions, services and products in technology, telecommunications, platforms and regulatory.” Source: RevenueBase Database · checked Sep 12, 2026
6	Citycom	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	46 contacts →
	Partial evidence “Citycom is one of the UK’s leading providers of business telecoms solutions, offering mobile, fixed and cloud services.” Source: RevenueBase Database · checked Sep 12, 2026
7	TIG Data Intelligence	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	45 contacts →
	Indirect evidence “TiG provide award-winning cloud transformation services, unified communications and infrastructure solutions.” Source: RevenueBase Database · checked Sep 12, 2026
8	MIX Consultancy LTD	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	32 contacts →
	Indirect evidence “MiX is an independent consultancy specialising in IT Infrastructure, Communication, Data Centre, Audio Visual, Physical Security & SMART Buildings Technology Solutions.” Source: RevenueBase Database · checked Sep 12, 2026
9	The Network Collective	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	32 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 12, 2026
10	JP Reis	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	26 contacts →
	Indirect evidence “JP Reis helps financial trading organizations make better technology decisions and deliver complex transformation programs with confidence.” Source: RevenueBase Database · checked Sep 12, 2026
11	Infrastructure Design Solutions	Indirect evidence	London, United KingdomHQ checked Sep 12, 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 12, 2026
12	Aarmtech Engineering Pvt. LTD	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	23 contacts →
	Partial evidence “AARMTech is one of the pioneers in the field of Telecommunication and Security system engineering consultancy services, we are leading in the industry since its inception.” Source: RevenueBase Database · checked Sep 12, 2026
13	Cavell	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	20 contacts →
	Indirect evidence “Cavell provides strategic advice to organisations enabling the Intelligent Workplace.” Source: RevenueBase Database · checked Sep 12, 2026
14	Recenso Services	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	15 contacts →
	Indirect evidence “Our sole mission is to help you deliver successful programmes faster.” Source: RevenueBase Database · checked Sep 12, 2026
15	Konvergent	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	14 contacts →
	Indirect evidence “At Konvergent, we do two things really well: We can ensure you are making the best technology investment decisions We have the best architects, for your company Strategic…” Source: RevenueBase Database · checked Sep 12, 2026
16	A3&o Limited	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	14 contacts →
	Partial evidence “A3 & O, the leading telecommunication System Integrator and Solution Provider; The company provides state of the art technologies and turnkey solutions to its clients across the…” Source: RevenueBase Database · checked Sep 12, 2026
17	Plum Consulting	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	12 contacts →
	Strong evidence “Based in London and Paris, we are a leading independent consulting firm, focused on the telecommunications, media, technology, and adjacent sectors.” Source: RevenueBase Database · checked Sep 12, 2026
18	Asygma	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	12 contacts →
	Indirect evidence “At Asygma, we're more than a technology provider; we're your trusted advisor and partner in growth.” Source: RevenueBase Database · checked Sep 12, 2026
19	Panoptic Technology	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	12 contacts →
	Partial evidence “PanOptic Technology are innovative IT & Telecom solution providers Panoptic Technology provides a range of telecommunication services to a variety of global institutions, such as…” Source: RevenueBase Database · checked Sep 12, 2026
20	Coleago Consulting	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	10 contacts →
	Indirect evidence “We provide advice, support and training to companies, investors and regulators in the communications sector.” Source: RevenueBase Database · checked Sep 12, 2026
21	Code Technology LTD	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	8 contacts →
	Partial evidence “Code exists to challenge, rethink and refine the selection, procurement and support of mobile telecommunications services for business users.” Source: RevenueBase Database · checked Sep 12, 2026
22	CSL Integration LTD	Indirect evidence	London, United KingdomHQ checked Sep 12, 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 12, 2026
23	OEM Support Solutions	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	7 contacts →
	Partial evidence “Elevate Telecom Excellence with OEM Support Solutions Welcome to OEM Support Solutions, your global telecom support partner.” Source: RevenueBase Database · checked Sep 12, 2026
24	Pentima	Partial evidence	London, United KingdomHQ checked Sep 12, 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 12, 2026
25	Orbex Solutions	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	5 contacts →
	Indirect evidence “One company for all your communications and collaboration needs.” Source: RevenueBase Database · checked Sep 12, 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 telecom 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 telecom consulting companies.
Partial evidence: Its own public description names part of enterprise telecom 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 telecom 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 199 enterprise telecom consulting companies based in London, United Kingdom

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

As of Sep 12, 2026

43.5%Verified-email coverage

8.2%Mobile-number coverage

14.3Average contacts per company

1-10Median size (employees)

95.0%Largest-city concentration · London

Sep 12, 2026Page data refreshed

Companies by employee count

1-10

119

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 15.0d

1,0520–30

18231–60

461–90

090–180

3180+

Company record updated

Median 78.0d

00–30

80731–60

1,55961–90

34090–180

145180+

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 telecom 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 telecom 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 telecom 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 telecom 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, 1,241 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 12, 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.

Enterprise telecom consulting companies by metro in the United Kingdom

Enterprise telecom consulting companies in London189

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 telecom 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 telecom consulting companies are there based in London, United Kingdom?

RevenueBase identified 199 enterprise telecom 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 has the most enterprise telecom consulting companies?

London leads with 189 headquartered companies, followed by Manchester (21) and Reading (17).

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 1,241 verified decision-maker contacts tracked across these 199 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 12, 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.