Company lists · Data refreshed September 2026

Top 25 Ip telephony software companies based in the United Kingdom

RevenueBase identified 89 company matches for ip telephony software companies associated with the United Kingdom as of September 2026 and tracks 806 professional contacts across them, including 286 with verified work emails. London is the largest hub.

This list covers company matches for ip telephony 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 28, 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 28, 2026 How this list was built
89Companies
806Contacts tracked
286Verified emails
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The 25 largest ip telephony software companies based in the United Kingdom

Ranked by team size
Top 25 of 89 company matches for ip telephony software companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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 matchChristchurch, United KingdomHQ recorded Sep 28, 202611-50112 contacts →

Exact match

“HiHi is a leading video-enabled business phone.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-20090 contacts →

Exact match

“Made for businesses of all sizes, Bicom Systems revolutionizes communications by providing PBXware, the world's most unified turnkey open standards hosted telephony platform, plus…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchBath, United KingdomHQ recorded Sep 28, 202651-20085 contacts →

Exact match

“Gradwell Communications Ltd are a leading cloud communications solutions provider with a focus on small to medium-sized businesses (SMEs).”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-20067 contacts →

Exact match

“Telappliant is an award-winning VoIP and cloud communications provider.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchGuildford, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5019 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchRomsey, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5015 contacts →

Exact match

“VTSL Ltd is a leading cloud communications company in the UK & Ireland.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchSheffield, United KingdomHQ recorded Sep 28, 202611-5014 contacts →

Exact match

“At Millgate Connect, we help organisations simplify communications and connectivity.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchLeicester, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
12Exact matchDummer, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5012 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchBirmingham, United KingdomHQ recorded Sep 28, 202611-5011 contacts →

Exact match

“ICOM VOICE is one of the most promising Telecommunication Service Providers based in the UK.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15Exact matchBolton, United KingdomHQ recorded Sep 28, 202611-5010 contacts →

Exact match

“At ClearTech Communications, we specialise in providing market-leading hardware, advanced systems, and intuitive software to build a robust and resilient communication…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16Exact matchBelfast, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
17Exact matchChelmsford, United KingdomHQ recorded Sep 28, 202611-507 contacts →

Exact match

“VoIPon is a worldwide business to business distributor of the highest quality voice over IP hardware.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-506 contacts →

Exact match

“At ZiAAS, we're passionate about harnessing the power of technology to transform businesses and streamline operations.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19Exact matchNottingham, United KingdomHQ recorded Sep 28, 202651-2006 contacts →

Exact match

“Founded in Wavenet has grown from simple beginnings to become one of the UK’s market leaders in unified communications and business telephony solutions.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
21Exact matchLong Crendon, United KingdomHQ recorded Sep 28, 20261-106 contacts →

Exact match

“Headquartered near Oxford in the UK, TeleSpeak specialises in training, consultancy, support and selected product distribution for Asterisk, VoIP, SIP and telephony generally.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 28, 20261-104 contacts →

Exact match

“Voicelinx are experts in VOIP telecoms.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23Exact matchLeeds, United KingdomHQ recorded Sep 28, 202611-504 contacts →

Exact match

“UK based ICC Networks provides outstanding telco Software as a Service for Internet Telephone Service providers throughout Europe and beyond.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24Exact matchGuildford, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
25Exact matchBrighton And Hove, United KingdomHQ recorded Sep 28, 20261-103 contacts →

Exact match

“Specialists in Business VoIP Telephony and Unified Comms Solutions for the modern hybrid workforce”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 25 of 89 ip telephony software companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 286 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Ip telephony software companies based in the United Kingdom at a glance

As of Sep 28, 2026
35.5%Verified-email coverage
9.1Average contacts per company
11-50Median size (employees)
32.6%Largest-city concentration · London
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
40
11-50
40
51-200
7
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 89 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 “ip telephony 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 286 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 28, 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.

Ip telephony software companies by metro

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 “ip telephony software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 89 company matches for ip telephony 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?

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

Which city has the most ip telephony software companies?

London leads with 29 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 286 professional contacts with verified work emails tracked across these 89 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 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 89 ip telephony software companies based in the United Kingdom. Start with a free account, no credit card.

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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.