Company lists · Data refreshed September 2026

Top 24 Voice over ip software companies based in the United Kingdom

RevenueBase identified 63 company matches for voice over ip software companies associated with the United Kingdom as of September 2026 and tracks 627 professional contacts across them, including 137 with verified work emails. London is the largest hub.

This list covers company matches for voice over ip software companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 29, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 29, 2026 How this list was built
63Companies
627Contacts tracked
137Verified emails
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The 24 largest voice over ip software companies based in the United Kingdom

Ranked by team size
Top 24 of 63 company matches for voice over ip software companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 29, 202651-200170 contacts →

Exact match

“bOnline is UK’s leading provider of VoIP services for micro and small businesses.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2Exact matchGuildford, United KingdomHQ recorded Sep 29, 202651-20062 contacts →

Exact match

“Nebula is a leading SaaS provider of workplace communications software, delivering powerful, secure, and adaptable solutions and applications for voice, messaging, customer…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 29, 20261-1026 contacts →

Exact match

“For over two decades, we have been delivering proprietary, carrier-grade software that enables operators to launch, manage and scale secure, reliable VoIP services.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 29, 202611-5019 contacts →

Exact match

“Voipfone is an Internet Telephone Service provided by iNet Telecoms Ltd.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5Exact matchRomsey, United KingdomHQ recorded Sep 29, 202611-5015 contacts →

Exact match

“ElemenTel are a leading provider of next generation voice over internet (VoIP) telephony solutions to businesses of all types and sizes.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6Exact matchLeicester, United KingdomHQ recorded Sep 29, 202611-5013 contacts →

Exact match

“CLOUD TELEPHONE SYSTEM The VoIP Shop is a leading provider of business VoIP phone systems, offering reliable and affordable solutions for small and medium-sized enterprises.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 29, 202611-5012 contacts →

Exact match

“Winning and keeping customers is a challenge for every business.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8Exact matchDummer, United KingdomHQ recorded Sep 29, 202611-5012 contacts →

Exact match

“SCG Wholesale is at the cutting edge of internet telephony developing and delivering super reliable technologies, applications and features, including Altos, our flagship white…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9Exact matchBelfast, United KingdomHQ recorded Sep 29, 202611-508 contacts →

Exact match

“Voxbit is reinventing the business phone by merging the worlds of cloud computing, web services & telecommunications to make collaborating part of the team.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10Exact matchLeeds, United KingdomHQ recorded Sep 29, 202611-508 contacts →

Exact match

“The Technology Group are a managed communications provider, helping businesses and organisations to better communicate with their customers and teams, by embracing voice over IP…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11Exact matchSt. Albans, United KingdomHQ recorded Sep 29, 202611-506 contacts →

Exact match

“At VOIspeed Ltd we offer VOIspeed phone system technology, a robust simple yet feature-rich cloud based phone system for SMEs with video, desktop sharing and chat functions, ideal…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Sep 29, 202611-506 contacts →

Exact match

“BitCall is a leading provider of VoIP services, specializing in delivering top-notch communication solutions to businesses and individuals.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13Exact matchWestbury, United KingdomHQ recorded Sep 29, 202611-505 contacts →

Exact match

“At Voice Simplified we believe that all businesses, large and small, should be able to communicate without the need for prohibitive and expensive licensing or infrastructure.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14Exact matchDatchet, United KingdomHQ recorded Sep 29, 202651-2005 contacts →

Exact match

“Designed to Talk (DTT) has re-designed the way business technology is delivered managed and used.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 29, 20261-104 contacts →

Exact match

“Voicelinx are experts in VOIP telecoms.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16Exact matchGuildford, United KingdomHQ recorded Sep 29, 202611-504 contacts →

Exact match

“Yay.com™ was started to take away the headaches of starting up or expanding your business communications.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17Exact matchWalsall, United KingdomHQ recorded Sep 29, 20261-103 contacts →

Exact match

“Birchills Telecom business VoIP is simply the better kind of phone service.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18Exact matchNewport, United KingdomHQ recorded Sep 29, 20261-102 contacts →

Exact match

“Based in Newport South Wales, our team supply and support SME companies with the same strategic telecommunication tools used by large enterprises, keeping IT simple and delivering…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19Exact matchSheffield, United KingdomHQ recorded Sep 29, 20261-102 contacts →

Exact match

“We are a leading provider of Voice over Internet Protocol (VoIP) services in UK.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20Exact matchSunderland, United KingdomHQ recorded Sep 29, 202611-502 contacts →

Exact match

“Soho66 is an award winning VoIP telephony provider which has been providing affordable and successful telecoms solutions to businesses since 2007.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21Exact matchNantwich, United KingdomHQ recorded Sep 29, 20261-102 contacts →

Exact match

“s3 Communications Ltd was founded as a result of the ever-increasing convergence between IT and Telephony and the fact that in 2025 BT will switch off the traditional ISDN network…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22Exact matchStafford, United KingdomHQ recorded Sep 29, 202611-501 contacts →

Exact match

“Grip is a cloud-based phone solutions provider.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23Exact matchPoole, United KingdomHQ recorded Sep 29, 20261-101 contacts →

Exact match

“Welcome to Dial 9, a friendly and ambitious company with big ideas and on a mission to provide the most reliable VoIP solution on the market, ensuring that wherever you are…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24Exact matchBirmingham, United KingdomHQ recorded Sep 29, 20261-101 contacts →

Exact match

“We’re Nimvelo.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 24 of 63 voice over ip software companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 137 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Voice over ip software companies based in the United Kingdom at a glance

As of Sep 29, 2026
21.9%Verified-email coverage
10.0Average contacts per company
11-50Median size (employees)
34.9%Largest-city concentration · London
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
27
11-50
27
51-200
6
201-500
1
501-1,000
1
10001+
1

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 63 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “voice over ip software companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 137 professional contacts with verified work emails across the full matched dataset. 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 29, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “voice over ip software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many voice over ip software companies are there based in the United Kingdom?

RevenueBase identified 63 company matches for voice over ip software companies associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Bonline tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most voice over ip software companies?

London leads with 22 company records, followed by Birmingham (3) and Manchester (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 137 professional contacts with verified work emails tracked across these 63 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 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 SmartSearch, 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.