Company lists · Data verified August 2026

Top 25 Calendar and scheduling software companies based in the United States

Name: Calendar and scheduling software companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 147 companies tracked

There are 147 calendar and scheduling software companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 1,215 professional contacts across them, including 430 with verified work emails and 515 with mobile numbers. San Francisco is the largest hub.

This list covers calendar and scheduling software companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

147Companies

1,215Contacts tracked

430Verified emails

515Mobile numbers

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The 25 largest calendar and scheduling software companies based in the United States

Ranked by team size

Top 25 of 147 calendar and scheduling software companies based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Calendly	Atlanta, GA	501-1,000	515	252
2	Sumo Scheduler	Atlanta, GA	51-200	57	18
3	Clockwise	San Francisco, CA	51-200	36	9
4	Franklin Planner Corporation	Salt Lake City, UT	51-200	30	11
5	Picktime	Austin, TX	11-50	30	6
6	Reclaim.ai From Dropbox	Portland, OR	11-50	19	15
7	Addevent	San Francisco, CA	11-50	18	15
8	Vimcal	New York City	11-50	18	13
9	SKED	Grand Rapids, MI	11-50	12	3
10	Timetap	Charlotte, NC	1-10	11	9
11	Calendar	Draper, UT	11-50	11	3
12	Acuity Scheduling	New York, NY	1,001-5,000	11	1
13	Atlas Business Solutions, INC	Fargo, ND	11-50	9	1
14	Stormsource Software	Scottsdale, AZ	51-200	6	2
15	Appointmentcore	Austin	11-50	6	2
16	FONS	Seattle, WA	1-10	6	2
17	Docketcalendar	Alamo, CA	1-10	5	4
18	Appointlet	Portland	1-10	5	3
19	Full Slate	San Francisco, CA	11-50	5	2
20	Forge Business Relationships	Philadelphia, PA	1-10	5	2
21	Acumen	New York, NY	1-10	5	2
22	Casino Schedule Ease	Sebastian, FL	11-50	5	1
23	Shift Admin	Columbia, SC	11-50	4	3
24	Letsmeet	San Francisco, CA	1-10	4	2
25	Asprova INC	Bowie, MD	1-10	4	2

Showing 25 of 147 calendar and scheduling software companies based in the United States

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Calendar and scheduling software companies based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

San FranciscoLargest hub · 14 HQs

515Contacts with mobile numbers

2Emails re-verified in last 30 days

Companies by employee count

1-10

109

11-50

51-200

201-500

501-1,000

1,001-5,000

Calendar and scheduling software companies by metro

Metro	Companies
Calendar and scheduling software companies in San Francisco	14
Calendar and scheduling software companies in New York	12
Calendar and scheduling software companies in Austin	7
Calendar and scheduling software companies in Seattle	6
Calendar and scheduling software companies in Chicago	5
Calendar and scheduling software companies in Salt Lake City	4
Calendar and scheduling software companies in Atlanta	3
Calendar and scheduling software companies in Los Angeles	3

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “calendar and scheduling software companies”, with match quality audited by blind human judging, and headquartered in the United States.
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: Contact records re-verify on a rolling cadence; 2 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many calendar and scheduling software companies are there based in the United States?

There are 147 calendar and scheduling software companies headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Calendly, headquartered in Atlanta, tops this list with the largest team on record.

Which city has the most calendar and scheduling software companies?

San Francisco leads with 14 headquartered companies, followed by New York (12) 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 430 verified decision-maker contacts tracked across these 147 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.