Company lists · Data refreshed September 2026

Top 25 Enterprise telecom management firms based in London, United Kingdom

Name: Enterprise telecom management firms 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 152 companies tracked

RevenueBase identified 152 enterprise telecom management firms headquartered in London, United Kingdom as of September 2026 and tracks 5,453 professional contacts across them, including 1,759 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers enterprise telecom management firms 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

152Companies

5,453Contacts tracked

1,759Verified emails

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The 25 largest enterprise telecom management firms based in London, United Kingdom

Ranked by team size

Top 25 of 152 enterprise telecom management firms 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 telecom management firms: 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	GAMMA	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	1,568 contacts →
	Indirect evidence “Gamma Communications is a leading provider of technology-based communication solutions across Europe.” Source: RevenueBase Database · checked Sep 28, 2026
2	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
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	Aurora Managed Services	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	162 contacts →
	Indirect evidence “Aurora Managed Services provide pro-actively managed workplace technology and support to organisations nationwide, helping them to optimise the performance and productivity of…” Source: RevenueBase Database · checked Sep 28, 2026
5	Programus LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	95 contacts →
	Partial evidence “Programus Limited boast over 15 years of experience developing the world's leading software for the Telecom and Events and Venues industries.” Source: RevenueBase Database · checked Sep 28, 2026
6	AURA	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	63 contacts →
	Partial evidence “Aura helps global enterprises streamline communications, customer experience and AI.” Source: RevenueBase Database · checked Sep 28, 2026
7	Citycom	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
8	Xenith Document Systems	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	39 contacts →
	Partial evidence “We modernise device management, extract valuable data and improve document workflows.” Source: RevenueBase Database · checked Sep 28, 2026
9	Avertec	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	33 contacts →
	Partial evidence “Proudly established in 2007, Avertec provides reliable technology solutions to help businesses stay connected, specialising in business telecoms, business mobile, landlines and…” Source: RevenueBase Database · checked Sep 28, 2026
10	The Network Collective	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
11	The Sprint Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	18 contacts →
	Indirect evidence “Simple, straightforward business technology solutions for UK business.” Source: RevenueBase Database · checked Sep 28, 2026
12	Cortel Telecom	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “Cortel is one of the UK's leading and most experienced telecommunications resellers for businesses.” Source: RevenueBase Database · checked Sep 28, 2026
13	TID Global	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “TID is an amalgamation of several businesses that service a number of major industrial titans, from construction, automation, aerospace and supply chain, we now offer a complete…” Source: RevenueBase Database · checked Sep 28, 2026
14	A3&o Limited	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
15	Panoptic Technology	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
16	Exfo Ontology	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	10 contacts →
	Partial evidence “EXFO Ontology is revolutionising how telecommunication network operators get to know their networks – and through this, their customers.” Source: RevenueBase Database · checked Sep 28, 2026
17	Doetaylor	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	9 contacts →
	Indirect evidence “We are a London based tech firm committed to making your customers experience better through technology.” Source: RevenueBase Database · checked Sep 28, 2026
18	Linx-Networks	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “Linx-Networks: Driving Innovation in Trading & Telecom Solutions Linx-Networks is a leading technology and telecommunications provider headquartered in the City of London…” Source: RevenueBase Database · checked Sep 28, 2026
19	Code Technology LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
20	SEETO	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	8 contacts →
	Indirect evidence “Seeto was created to take away the hassle of running business technology, while optimising its value to your business.” Source: RevenueBase Database · checked Sep 28, 2026
21	Prime Connect	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Indirect evidence “Established in 2011, Prime Connect is a London-based connectivity and managed services group delivering technology solutions across the UK.” Source: RevenueBase Database · checked Sep 28, 2026
22	Billmonitor	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Indirect evidence “Founded in 2009 by three Oxford-based mathematicians, Billmonitor combines proprietary software and deep expertise in tariffs, pricing strategies, and peer benchmarking to help…” Source: RevenueBase Database · checked Sep 28, 2026
23	OEM Support Solutions	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
24	Supportwizard	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	6 contacts →
	Partial evidence “SupportWizard is a Division of ClubWizard Ltd We are an IT and Telecoms company offering a personal in-house technical support service and enhanced telecom solutions for SME's.” Source: RevenueBase Database · checked Sep 28, 2026
25	Glemnet LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	6 contacts →
	Partial evidence “Glemnet is part of Southern Communications Company (SCG Corporate), provider of telecoms, cloud communications and IT services to businesses of all sizes- from start ups through…” 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 telecom management firms. 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 management firms.
Partial evidence: Its own public description names part of enterprise telecom management firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise telecom management firms. 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 152 enterprise telecom management firms based in London, United Kingdom

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Enterprise telecom management firms based in London, United Kingdom at a glance

As of Sep 28, 2026

32.3%Verified-email coverage

35.9Average contacts per company

11-50Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

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 152 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 telecom management firms, 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 management firms”. 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 management firms), 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 management firms, 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, 1,759 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 telecom management firms, 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 management firms are there based in London, United Kingdom?

RevenueBase identified 152 enterprise telecom management firms 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?

GAMMA, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most enterprise telecom management firms?

London leads the United Kingdom with 152 headquartered companies, followed by Glasgow (19) and Leeds (18).

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 1,759 verified decision-maker contacts tracked across these 152 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.