Company lists · Data refreshed September 2026
Top 25 Virtual calendar management companies worldwide
RevenueBase identified 914 virtual calendar management companies worldwide as of September 2026 and tracks 3,190 professional contacts across them, including 609 with verified work emails. The United States is the largest market and London the largest hub.
This list covers virtual calendar management companies 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 22, 2026. Country and city lists for virtual calendar management companies 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 virtual calendar management companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 507 contacts → | ||||
Partial evidence “At Calendly, our vision is to take the work out of connecting with others so you can accomplish more.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 2 | 64 contacts → | ||||
Indirect evidence “At TIMIFY, we empower businesses with cutting-edge appointment booking and resource scheduling solutions.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 3 | 57 contacts → | ||||
Indirect evidence “SUMO is a customer engagement platform that includes online Appointment, Event, and Field Sales scheduling, built fully native on Salesforce.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 4 | 48 contacts → | ||||
Indirect evidence “TimeTree 500 TimeTree Apple Best of 2015 App Store Watch App Store App StoreApp VERYLEECHANTO Web10 FacebookFbStart 4 120%#02 Web Designing 20163…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 5 | 43 contacts → | ||||
Partial evidence “Milrich Virtual Professionals, LLC is the next phase of Milrich Associates, LLP, which has been serving clients since 2009.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 6 | 37 contacts → | ||||
Partial evidence “Clockwise is an AI-powered calendar assistant that builds smarter schedules for everyone by coordinating the way individuals, teams, and companies prefer to work.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 7 | 31 contacts → | ||||
Indirect evidence “Picktime is one of the world's leading scheduling platforms providing a quick, intuitive tool that enables professionals to book meetings with clients.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 8 | 24 contacts → | ||||
Indirect evidence “Clara is your partner in doing great work.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 9 | 22 contacts → | ||||
Indirect evidence “Setmore offers a free online scheduling platform that empowers you to balance your scheduling, connect with customers, and grow your brand.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 10 | 20 contacts → | ||||
Partial evidence “ECAL is the world’s leading calendar marketing platform.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 11 | 19 contacts → | ||||
Partial evidence “Vimcal is the world's fastest calendar, beautifully designed for people who have too many meetings.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 12 | 19 contacts → | ||||
Partial evidence “Virtual Cathy is a U.S-based virtual assistant agency providing professional administrative support, executive assistant services, and operational support to busy business owners…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 13 | 19 contacts → | ||||
Indirect evidence “We build, deploy, and continuously improve custom AI agents for your business.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 14 | 18 contacts → | ||||
Strong evidence “AddEvent is a cutting-edge software company providing best-in-class calendar marketing and event management solutions to thousands of companies worldwide.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 15 | 17 contacts → | ||||
Indirect evidence “Ideoimage Sdn Bhd is an Events Services company located in Jalan Pju 8/1, Petaling Jaya, Selangor, Malaysia.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 16 | 15 contacts → | ||||
Indirect evidence “Unique Model Inc is an Events Services company located in 2500 Walker Ave Nw, Grand Rapids, Michigan, United States.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 17 | 14 contacts → | ||||
Indirect evidence “Trickle is the smartest personal assistant for the tech-savvy business professional designed to eliminate tedious back-and-forth scheduling messages - so you can connect…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 18 | 13 contacts → | ||||
Indirect evidence “cituro ist das Wachstumssystem für Dienstleistungsunternehmen.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 19 | 11 contacts → | ||||
Indirect evidence “At Book Like A Boss, we're redefining how businesses engage with their clients, streamline operations, and maximize revenue.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 20 | 11 contacts → | ||||
Partial evidence “We are Calendar, trying to make the world a much more productive place.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 21 | 11 contacts → | ||||
Indirect evidence “Flexible scheduling software designed to help you grow, because booking time should never get in the way of success.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 22 | 11 contacts → | ||||
Partial evidence “The Concierge is a virtual executive assistant company that helps you with all of your administrative needs.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 23 | 10 contacts → | ||||
Indirect evidence “Our boutique team is composed of hard working women from around the country, who understand the need for discretion, trust and excellence.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 24 | 10 contacts → | ||||
Indirect evidence “SDFE GmbH is based in Hürtgenwald, Germany and puts its focus on scheduling Software for all requirements of a Company.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 25 | 10 contacts → | ||||
Partial evidence “Founded in 2014 in Switzerland, Teamup is the calendar tool for groups to organize, schedule and track activities.” Source: RevenueBase Database · checked Sep 22, 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: virtual calendar management 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 virtual calendar management companies.
- Partial evidence
- Its own public description names part of virtual calendar management companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name virtual calendar management 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 914 virtual calendar management companies worldwide
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 609 reachable decision-makers.
Free signup · no credit card
Virtual calendar management companies worldwide at a glance
As of Sep 22, 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 virtual calendar management 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.
- Coverage
- Every country. Country and city lists for virtual calendar management companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “virtual calendar management 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 virtual calendar management 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 virtual calendar management companies, 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, 609 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 22, 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.
Virtual calendar management companies by location
3 lists · largest firstEvery Virtual calendar management companies 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 virtual calendar management 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 virtual calendar management companies are there worldwide?
RevenueBase identified 914 virtual calendar management companies 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?
Calendly, headquartered in Atlanta, tops this list with the largest team on record.
Which country has the most virtual calendar management companies?
The United States leads with 180 companies, followed by the United Kingdom (88) and Germany (29). Every virtual calendar management companies list by country and city is linked on this page.
Which city has the most virtual calendar management companies?
London leads with 27 headquartered companies, followed by New York (15) and Paris (13).
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 609 verified decision-maker contacts tracked across these 914 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 22, 2026.
Ready to reach these companies? Verified emails and direct dials for all 914 virtual calendar management companies worldwide. Start with a free account, no credit card.
Download this list →Related lists
Browse the directory
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.