Company lists · Data refreshed September 2026
Top 25 Carrier cloud software companies based in the United Kingdom
RevenueBase identified 87 carrier cloud software companies headquartered in the United Kingdom as of September 2026 and tracks 3,088 professional contacts across them, including 789 with verified work emails. London is the largest hub.
This list covers carrier cloud software companies headquartered in the 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 27, 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.
The 25 largest carrier cloud software companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 433 contacts → | ||||
Indirect evidence “We've moved!” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 364 contacts → | ||||
Partial evidence “Cerillion is a leading provider of BSS/OSS software for the telecommunications industry, with over 25 years’ experience supporting mobile, fixed, cable and multi-service operators…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 148 contacts → | ||||
Indirect evidence “Great technology matters, but it’s great people who make it work.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 125 contacts → | ||||
Partial evidence “Telesens is a global provider of enterprise level cost effective software products and solutions for telecom and other business domains.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 113 contacts → | ||||
Indirect evidence “MDS Global powers digital telcos for revenue growth, customer delight, and cost reduction.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 98 contacts → | ||||
Indirect evidence “Barclay Communications is the leading provider of business mobile, landline and digital solutions, supporting small, medium and large organisations across the UK.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 91 contacts → | ||||
Strong evidence “Metaswitch is a recognized leader in the development of ultra-high-performance, cloud native communications software.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 64 contacts → | ||||
Indirect evidence “Usha Martin Technologies (UMT) is the technology services arm of the Usha Martin Group, a business conglomerate.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 60 contacts → | ||||
Strong evidence “Digitalk, a Hansen Technologies company, enables communications service providers worldwide to operate efficient and innovative services profitably with its Carrier Cloud and…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 52 contacts → | ||||
Indirect evidence “We propel telecoms to innovate fearlessly for the last 30 years.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 38 contacts → | ||||
Partial evidence “Tekton Billing develops software that helps service providers simplify, automate and scale.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 38 contacts → | ||||
Partial evidence “Spectrum helps UK organisations stay connected with reliable business mobile, connectivity, cloud communications and customer experience solutions.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 31 contacts → | ||||
Partial evidence “OnApp makes cloud fast, easy & profitable for Telcos, MSPs & other cloud service providers.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 29 contacts → | ||||
Indirect evidence “In a world where the only constant is change, it’s never been more critical for service providers to innovate to grow faster and more cost effectively.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 28 contacts → | ||||
Partial evidence “Now part of the Onecom Group, Olive and Onecom create the largest business-to-business mobile, fixed-line and cloud specialist in the UK.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 27 contacts → | ||||
Indirect evidence “At Mission Labs we have a single vision: to power the future of business communications.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 21 contacts → | ||||
Indirect evidence “Spartified is a global telecommunications technology company that helps mobile network operators, MVNOs, and digital service providers transform complex network operations into…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 18 contacts → | ||||
Partial evidence “We work with Communications Service Providers (CSPs), carriers and enterprise customers to improve customer loyalty, simplify operations, drive growth, support regulatory…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 18 contacts → | ||||
Partial evidence “JeraSoft is a leading developer and integrator of full-featured Billing Software for modern Telecom Operators (VoIP) and IoT/M2M Providers.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 12 contacts → | ||||
Partial evidence “We are a UK-based development company specialising in data capture and communication software solutions.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 12 contacts → | ||||
Partial evidence “Pebbletree Ltd is a very successful, award winning, cloud-based technology company, and is the parent company of Soho66, Usomo, Simply66 and Quvu.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 11 contacts → | ||||
Indirect evidence “Net AI is a network intelligence and advanced analytics company in the Telecom sector.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 10 contacts → | ||||
Partial evidence “With over 20 years of experience, salestar continues to lead the way in delivering software solutions specifically designed for the telecom, mobile phone, and cellular industries.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 10 contacts → | ||||
Indirect evidence “In today’s increasingly complex Networks, IT infrastructure and Services, business critical operations cannot rely on Human Intelligence alone.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 8 contacts → | ||||
Partial evidence “VanillaIP is a leading UK provider of real-time, integrated communication solutions in the Cloud.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
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: carrier cloud software 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 carrier cloud software companies.
- Partial evidence
- Its own public description names part of carrier cloud software companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name carrier cloud software 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 87 carrier cloud software companies based in the United Kingdom
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Carrier cloud software companies based in the United Kingdom at a glance
As of Sep 27, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 87 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 carrier cloud software 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 the United Kingdom whose own description of what they do matches “carrier cloud software 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 carrier cloud software 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 carrier cloud software companies, and records with no verified work email. Companies headquartered outside United Kingdom 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, 789 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 27, 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 carrier cloud software 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 carrier cloud software companies are there based in the United Kingdom?
RevenueBase identified 87 carrier cloud software companies headquartered in the 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?
Imimobile Part Of Webex, headquartered in London, tops this list with the largest team on record.
Which city has the most carrier cloud software companies?
London leads with 27 headquartered companies, followed by Basingstoke (3) and Croydon (3).
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 789 verified decision-maker contacts tracked across these 87 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 27, 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.
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