Company lists · Data refreshed September 2026
Top 25 Appointment scheduling outsourcing companies worldwide
RevenueBase identified 1,902 appointment scheduling outsourcing companies worldwide as of September 2026 and tracks 11,463 professional contacts across them, including 1,593 with verified work emails. The United States is the largest market and London the largest hub.
This list covers appointment scheduling outsourcing 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 27, 2026. Country and city lists for appointment scheduling outsourcing 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 appointment scheduling outsourcing companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 411 contacts → | ||||
Indirect evidence “Teem is building the hybrid workforce for healthcare practices, connecting providers with qualified, reliable, English-proficient virtual assistants for front desk, scribing…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 310 contacts → | ||||
Partial evidence “Founded in 2008, SOPHI is an outsourcing center based in the Philippines.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 250 contacts → | ||||
Indirect evidence “At Relatient we’re on a mission to make access to healthcare simpler.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 224 contacts → | ||||
Partial evidence “Staffingly, Inc.| 🤝 Your Partner in Healthcare Outsourcing We specialize in healthcare outsourcing services to address staff shortages and revenue losses.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 196 contacts → | ||||
Indirect evidence “Founded in 1987, Capitol Concierge set out to transform the concierge industry-and we did just that.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 184 contacts → | ||||
Indirect evidence “Hospital Sao Mateus is a hospital & health care company based out of Av Santos Dumont, 5633, Fortaleza, Ce, Brazil.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 183 contacts → | ||||
Indirect evidence “CSS provides a critical backbone service to real estate agents in markets across the country.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 176 contacts → | ||||
Indirect evidence “AgendaPro es la plataforma líder en Latinoamérica para el agendamiento, gestión, pagos y crecimiento de negocios de belleza, bienestar y salud.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 145 contacts → | ||||
Partial evidence “DoktorTakvimi is Turkey’s number 1 online portal for booking appointments with medical professionals.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 120 contacts → | ||||
Indirect evidence “O Grupo HelpMed Saúde surgiu em 2015 com o objetivo de fazer a gestão de escalas médicas com excelência, fazendo a gestão de equipes multidisciplinares e intermediando o…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 107 contacts → | ||||
Indirect evidence “Sequence Health brings decades of dedicated healthcare expertise, offering full-service medical contact center solutions designed to adapt to the unique needs of any healthcare…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 102 contacts → | ||||
Indirect evidence “Provide personalized care to all of your patients by partnering with our patient contact center, solely focused on serving healthcare.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 94 contacts → | ||||
Partial evidence “YCLIENTS is an online booking software and all-in-one automation platform for service-based businesses: Book appointments online, set and manage employee schedules easily, reduce…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 78 contacts → | ||||
Partial evidence “Grow your business with Medical Staffing and Virtual Assistant Solutions Complete back-office outsourcing service tailored to your healthcare business needs” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 69 contacts → | ||||
Indirect evidence “Depuis 2011, Tricom propose des solutions sur mesure en externalisation pour accompagner les entreprises dans leur croissance et améliorer leur relation client.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 64 contacts → | ||||
Strong evidence “At TIMIFY, we empower businesses with cutting-edge appointment booking and resource scheduling solutions.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 62 contacts → | ||||
Indirect evidence “ReferWell is a healthcare technology company on a mission to get people to the doctor.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 61 contacts → | ||||
Partial evidence “Seasoned appointment setters ready to fill your pipeline with verified and qualified prospects.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 61 contacts → | ||||
Indirect evidence “At Telemed, we help healthcare providers in the U.S.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 57 contacts → | ||||
Strong 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 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 56 contacts → | ||||
Indirect evidence “STATLINX’s medical call center services streamline patient communication and practice operations through a HIPAA‑compliant contact center that integrates directly with Epic and…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 56 contacts → | ||||
Indirect evidence “Modern Receptionist is a small group of savvy and sophisticated receptionists that make life easier!” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 54 contacts → | ||||
Indirect evidence “A young & dynamic company set up by medical professionals to provide back-office services for small and medium health care practices in the USA.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 52 contacts → | ||||
Strong evidence “Automate appointment scheduling, confirmations, and bilingual patient communication for clinics in the U.S.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 47 contacts → | ||||
Indirect evidence “En Cero ayudamos a que Hospitales y Clínicas atiendan a más pacientes y pierdan menos horas.” 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: appointment scheduling outsourcing 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 appointment scheduling outsourcing companies.
- Partial evidence
- Its own public description names part of appointment scheduling outsourcing companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name appointment scheduling outsourcing 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 1,902 appointment scheduling outsourcing companies worldwide
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Appointment scheduling outsourcing companies worldwide at a glance
As of Sep 27, 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 appointment scheduling outsourcing 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 appointment scheduling outsourcing companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “appointment scheduling outsourcing 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 appointment scheduling outsourcing 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 appointment scheduling outsourcing 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, 1,593 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.
Appointment scheduling outsourcing companies by location
8 lists · largest firstEvery Appointment scheduling outsourcing companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Appointment scheduling outsourcing companies based in the United States354
- Appointment scheduling outsourcing companies based in France150
- Appointment scheduling outsourcing companies based in Brazil90
- Appointment scheduling outsourcing companies based in the United Kingdom83
- Appointment scheduling outsourcing companies based in Canada57
- Appointment scheduling outsourcing companies based in Germany46
- Appointment scheduling outsourcing companies based in Australia30
- Appointment scheduling outsourcing companies based in the Netherlands25
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 appointment scheduling outsourcing 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 appointment scheduling outsourcing companies are there worldwide?
RevenueBase identified 1,902 appointment scheduling outsourcing 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?
TEEM, headquartered in Salt Lake City, tops this list with the largest team on record.
Which country has the most appointment scheduling outsourcing companies?
The United States leads with 354 companies, followed by France (150) and Brazil (90). Every appointment scheduling outsourcing companies list by country and city is linked on this page.
Which city has the most appointment scheduling outsourcing companies?
London leads with 29 headquartered companies, followed by Paris (23) and New York (19).
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 1,593 verified decision-maker contacts tracked across these 1,902 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.