Company lists · Data refreshed September 2026
Top 25 Conference calling services worldwide
RevenueBase identified 519 conference calling services worldwide as of September 2026 and tracks 20,605 professional contacts across them, including 5,091 with verified work emails. The United States is the largest market and London the largest hub.
This list covers conference calling services worldwide, 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 19, 2026. Country and city lists for conference calling services follow the table.
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 conference calling services worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 9,706 contacts → | ||||
Indirect evidence “Bring teams together, reimagine workspaces, engage new audiences, and delight your customers –– all on the Zoom AI-first work platform you know and love.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,464 contacts → | ||||
Indirect evidence “PGi powers virtual events and meetings for customers safely and reliably, helping people, teams, and enterprises connect worldwide with advanced broadcasting and webcasting…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 773 contacts → | ||||
Partial evidence “Yealink (Stock Code: 300628) is a global brand that specializes in video conferencing, voice communications and collaboration solutions with best-in-class quality, innovative…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 401 contacts → | ||||
Indirect evidence “Lifesize delivers immersive communication experiences for the global enterprise.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 278 contacts → | ||||
Indirect evidence “OpenExchange is chosen by the most demanding industries in the world as their virtual communications partner.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 264 contacts → | ||||
Indirect evidence “Please be advised that BlueJeans by Verizon is being sunset, concluding in the first half of 2024.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 202 contacts → | ||||
Indirect evidence “Since 1987, Hello Direct has helped small and medium-sized businesses (SMBs) find the right audio and video solutions to stay connected and productive.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 178 contacts → | ||||
Indirect evidence “Um mundo de soluções de Webcasting.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 139 contacts → | ||||
Indirect evidence “Bring the magic of television to your webinars, events, and meetings with Brandlive, your platform for creating elevated video experiences.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 137 contacts → | ||||
Indirect evidence “Airmeet - Revolutionizing Webinars and Events At Airmeet, we believe webinars should be more than just digital gatherings-they should be immersive experiences that captivate and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 124 contacts → | ||||
Partial evidence “Founded and run by professionals who had pioneered the rollout of large-scale B2B video conferencing (VC) services in their previous roles, VCnow is a brand with a leading edge in…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 121 contacts → | ||||
Indirect evidence “Slido is a technology company that makes an easy to use Q&A and polling platform for live, remote or hybrid meetings, events, classes, and webinars.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 120 contacts → | ||||
Indirect evidence “Chorus Call Inc, headquartered in Pittsburgh, Pennsylvania, is a global leader in event management solutions with offices in the United States, Europe, South Africa, India…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 101 contacts → | ||||
Indirect evidence “InstaVC provides a complete suite of Video Collaboration platforms across all industry verticals to cater to the unique requirements of each sector.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 99 contacts → | ||||
Indirect evidence “Trusted by the largest global enterprises for more than 20 years in the energy, financial services, hospitality, insurance, life sciences, professional services consulting, and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 80 contacts → | ||||
Partial evidence “Door Sabha Nigam Limited (DSNL) is India’s largest Independent Integrated Conferencing provider.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 71 contacts → | ||||
Partial evidence “AVS are experts in all types of online meetings and video conferencing solutions.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 70 contacts → | ||||
Partial evidence “Streamlined Communications is a leading provider of Audio Conferencing, Collaboration, Webcasting, Virtual Events & Streaming Solutions.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 65 contacts → | ||||
Partial evidence “Phoenix-based iLinc Communications, Inc, a subsidiary of BroadSoft, Inc.(NASDAQ: BSFT), provides advanced web conferencing services for businesses, governments, and educational…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 65 contacts → | ||||
Partial evidence “Audio and video conferencing solutions from Yamaha Corporation streamline collaboration and boost productivity wherever people work.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 59 contacts → | ||||
Indirect evidence “Cap-visio assemble, installe et met en œuvre des solutions de réunion à distance et de communication multi-sites : LE spécialiste français de la visioconférence.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 54 contacts → | ||||
Partial evidence “We provide a SaaS based visual communications platform for web conferencing and web broadcasting.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 53 contacts → | ||||
Indirect evidence “Med stor lyhördhet och hög kompetens inom både AV och IT är Logic IT en komplett helhetsleverantör inom digitala möten till företag och organisationer.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 49 contacts → | ||||
Indirect evidence “Webstream is a Global name in the business of Physical, Hybrid & Virtual Event Management Services as well as Platforms.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 44 contacts → | ||||
Indirect evidence “Connecting people is at the core of what we do.” Source: RevenueBase Database · checked Sep 19, 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: conference calling services. 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 conference calling services.
- Partial evidence
- Its own public description names part of conference calling services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name conference calling services. 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 519 conference calling services worldwide
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 5,091 reachable decision-makers.
Free signup · no credit card
Conference calling services worldwide at a glance
As of Sep 19, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 conference calling services, 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.
- Coverage
- Every country. Country and city lists for conference calling services are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “conference calling services”. 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 conference calling services), 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 conference calling services, and records with no verified work email.
- 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, 5,091 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 19, 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.
Conference calling services by location
2 lists · largest firstEvery Conference calling services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
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 conference calling services, 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 conference calling services are there worldwide?
RevenueBase identified 519 conference calling services worldwide 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?
ZOOM, headquartered in San Jose, tops this list with the largest team on record.
Which country has the most conference calling services?
The United States leads with 163 companies, followed by the United Kingdom (27). Every conference calling services list by country and city is linked on this page.
Which city has the most conference calling services?
London leads with 8 headquartered companies, followed by New York (8) and Austin (7).
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 5,091 verified decision-maker contacts tracked across these 519 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 19, 2026.
Ready to reach these companies? Verified emails and direct dials for all 519 conference calling services worldwide. Start with a free account, no credit card.
Download this list →Related lists
Browse the directory
Browse: Companies home · Lists by location · New lists
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.