Company lists · Data refreshed September 2026

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

Name: Enterprise telecom sales 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 100 companies tracked

RevenueBase identified 100 enterprise telecom sales firms headquartered in London, United Kingdom as of September 2026 and tracks 3,533 professional contacts across them, including 1,461 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers enterprise telecom sales 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

100Companies

3,533Contacts tracked

1,461Verified emails

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

Ranked by team size

Top 25 of 100 enterprise telecom sales 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 sales 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	BT Local Business	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	157 contacts →
	Indirect evidence “At BT Local Business London West & South we are part of BT's Business division.” Source: RevenueBase Database · checked Sep 28, 2026
4	Spitfire Network Services LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	99 contacts →
	Partial evidence “Spitfire Network Services is a UK-based, multi-award winning telecoms and ISP provider for businesses.” Source: RevenueBase Database · checked Sep 28, 2026
5	Radiocoms Systems LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	57 contacts →
	Indirect evidence “Radiocoms Systems Limited is a mature communications company of some 50 years and is now the UK’s leading independent communications supplier specialising in the design…” Source: RevenueBase Database · checked Sep 28, 2026
6	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
7	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
8	Qxtel Limited	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	17 contacts →
	Partial evidence “QXTEL is one of the most advanced & diversified Telecommunications & Technology Services Provider focused on Retail & Wholesale Voice Platform Partioning, Wholesale Carrier Voice…” Source: RevenueBase Database · checked Sep 28, 2026
9	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
10	1823 Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect evidence “In the real world, we have seen how people care for each other, as humans.” Source: RevenueBase Database · checked Sep 28, 2026
11	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
12	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
13	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
14	Smart Connect Telecom	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	8 contacts →
	Partial evidence “Smart Connect Telecom is one of the UK’s leading providers in voice and data communications.” Source: RevenueBase Database · checked Sep 28, 2026
15	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
16	Redmill Marketing Associates	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	6 contacts →
	Strong evidence “Redmill Marketing Associates has been created to provide technology and telecommunications companies with the marketing and sales expertise required to provide sustained growth.” Source: RevenueBase Database · checked Sep 28, 2026
17	Orbex Solutions	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “One company for all your communications and collaboration needs.” Source: RevenueBase Database · checked Sep 28, 2026
18	Multiple Networks	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	5 contacts →
	Indirect evidence “Do Not Miss the Beat & Explore the Top IT Solution Company In The UK Multiple Networks work as magnets and attract tech enthusiasts from around the globe because this unparalleled…” Source: RevenueBase Database · checked Sep 28, 2026
19	Broadgate Voice And Data LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	3 contacts →
	Indirect evidence “Broadgate is the amalgamation of Acorn Networks Services and Sure Communications.” Source: RevenueBase Database · checked Sep 28, 2026
20	Glow Telecom	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Glow Telecom is a provider of a full range of telecommunication solutions to both business and residential customers in the UK.” Source: RevenueBase Database · checked Sep 28, 2026
21	Pulsecomm Solutions LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Pulsecomm Solutions Ltd offers quality technical services to resellers within the telecommunications industry.” Source: RevenueBase Database · checked Sep 28, 2026
22	Cybermo	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	2 contacts →
	Indirect evidence “For over 15 years CYBERMO have been providing communications and technology solutions which make your business nimble, efficient, innovative and smart.” Source: RevenueBase Database · checked Sep 28, 2026
23	Novas11	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	2 contacts →
	Indirect evidence “Let us help you reach your market.” Source: RevenueBase Database · checked Sep 28, 2026
24	Cormargin Consulting Limited	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Cormargin Consulting Limited, is a UK based boutique sales enablement organisation for technology start-ups in the Unified Communications space.” Source: RevenueBase Database · checked Sep 28, 2026
25	Networking Arts LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	2 contacts →
	Indirect evidence “Who Are We- Networking Arts LTD.” 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 sales 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 sales firms.
Partial evidence: Its own public description names part of enterprise telecom sales 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 sales 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 100 enterprise telecom sales firms based in London, United Kingdom

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

As of Sep 28, 2026

41.4%Verified-email coverage

35.3Average 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

1,001-5,000

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 100 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 sales 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 sales 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 sales 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 sales 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, 1,461 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 sales 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 sales firms are there based in London, United Kingdom?

RevenueBase identified 100 enterprise telecom sales 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 sales firms?

London leads the United Kingdom with 100 headquartered companies, followed by Birmingham (16) and Manchester (14).

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 1,461 verified decision-maker contacts tracked across these 100 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.