Company lists · Data refreshed September 2026
Top 25 Calendar software developers worldwide
RevenueBase identified 142 company matches for calendar software developers worldwide as of September 2026 and tracks 517 professional contacts across them, including 99 with verified work emails. The United States is the largest market and San Francisco the largest hub.
This list covers company matches for calendar software developers worldwide, 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 27, 2026. Country and city lists for calendar software developers follow the table.
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.
The 25 largest calendar software developers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 48 contacts → | ||||
Exact match “TimeTree 500 TimeTree Apple Best of 2015 App Store Watch App Store App StoreApp VERYLEECHANTO Web10 FacebookFbStart 4 120%#02 Web Designing 20163…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 2 | 37 contacts → | ||||
Exact match “Clockwise is an AI-powered calendar assistant that builds smarter schedules for everyone by coordinating the way individuals, teams, and companies prefer to work.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 3 | 19 contacts → | ||||
Exact match “Vimcal is the world's fastest calendar, beautifully designed for people who have too many meetings.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 4 | 19 contacts → | ||||
Exact match “Your 9am class.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 5 | 18 contacts → | ||||
Exact match “AddEvent is a cutting-edge software company providing best-in-class calendar marketing and event management solutions to thousands of companies worldwide.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 6 | 17 contacts → | ||||
Exact match “The important stuff doesn't happen just because you write it down.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 7 | 11 contacts → | ||||
Exact match “We are Calendar, trying to make the world a much more productive place.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 8 | 9 contacts → | ||||
Exact match “Zersey Infotech is a next-gen tech based company that has many brands under its portfolio.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 9 | 7 contacts → | ||||
Exact match “Mobiscroll helps engineering teams build complex scheduling, appointment booking, planning, and resource management experiences without starting from scratch or getting locked…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 10 | 7 contacts → | ||||
Exact match “Elevate your planning with Lectie's interactive, branded calendars.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 11 | 5 contacts → | ||||
Exact match “Forge stronger relationships in every meeting with the only people-centered calendar app.#forgeyournetwork” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 12 | 5 contacts → | ||||
Exact match “Stop juggling calendars.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 13 | 5 contacts → | ||||
Exact match “Acumen is a powerful and innovative software that helps individuals and teams achieve their goals by maximizing their productivity.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 14 | 4 contacts → | ||||
Exact match “We're the sync experts!” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 15 | 4 contacts → | ||||
Exact match “OneCal is a tool that syncs Outlook, iCloud and Google Calendars, provides intuitive scheduling links that make scheduling simple, and allows you to view Outlook, iCloud and…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 16 | 4 contacts → | ||||
Exact match “Fhynix is a daily planner and calendar, built with Open AI, text and voice to help focus on what matters to you and not just tasks and to-dos.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 17 | 4 contacts → | ||||
Exact match “ET Labs is a software development company in Austin, Texas devoted to simplicity and productivity.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 18 | 3 contacts → | ||||
Exact match “Sparkeey is a mobile calendaring application product with a patented status.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 19 | 3 contacts → | ||||
Exact match “Productivity software to run your business on your device anytime -leveraging the cloud, AI and social tools to optimize your calendar experience.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 20 | 3 contacts → | ||||
Exact match “Raft is a beautiful and fun calendar app designed for couples, families and close friends that want to sync calendars, spend more time together and have things to look forward to.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 21 | 3 contacts → | ||||
Exact match “In today's fast-paced world, staying on top of your schedule and sharing events seamlessly can be a challenge.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 22 | 3 contacts → | ||||
Exact match “Our user-friendly App lets you effortlessly plan for birthdays, festivals, sports events, holidays, and more.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 23 | 2 contacts → | ||||
Exact match “Time Theory Software develops apps for iOS.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 24 | 2 contacts → | ||||
Exact match “CalendarBridge helps professionals, teams, and organizations manage their multiple calendars seamlessly and with confidence.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 25 | 2 contacts → | ||||
Exact match “You have messaging apps for chatting.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “calendar software developers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 142 calendar software developers worldwide
See the full list, filter by size, metro and specialty, and access 99 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Calendar software developers 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
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.
- Coverage
- Every country. Country and city lists for calendar software developers are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “calendar software developers” 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. 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 99 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 27, 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.
Calendar software developers by location
1 lists · largest firstEvery Calendar software developers 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 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 “calendar software developers”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many calendar software developers are there worldwide?
RevenueBase identified 142 company matches for calendar software developers worldwide 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?
株式会社timetree tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which country has the most calendar software developers?
The United States leads with 43 companies. Every calendar software developers list by country and city is linked on this page.
Which city has the most calendar software developers?
San Francisco leads with 5 company records, followed by Paris (3) and Austin (2).
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 99 professional contacts with verified work emails tracked across these 142 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 27, 2026.
Ready to reach these companies? Verified emails and direct dials for all 142 calendar software developers worldwide. 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.
More company lists
Company intelligence · public preview
Top 25 calendar software developers worldwide
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 142 matching company records for calendar software developers worldwide, with 517 tracked contacts and 99 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 27, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 calendar software developers worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | 株式会社timetreejubilee.works HQ: 新宿区, JapanReported employees: 11-50 | 新宿区, Japan | 11-50 | Exact match | 48 contacts → |
“TimeTree 500 TimeTree Apple Best of 2015 App Store Watch App Store App StoreApp VERYLEECHANTO Web10 FacebookFbStart 4 120%#02 Web Designing 20163…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Clockwisegetclockwise.comHQ: San Francisco, CA, United StatesReported employees: 51-200 | San Francisco, CA, United States | 51-200 | Exact match | 37 contacts → |
“Clockwise is an AI-powered calendar assistant that builds smarter schedules for everyone by coordinating the way individuals, teams, and companies prefer to work.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Vimcalvimcal.comHQ: New York, United StatesReported employees: 11-50 | New York, United States | 11-50 | Exact match | 19 contacts → |
“Vimcal is the world's fastest calendar, beautifully designed for people who have too many meetings.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Howbouthowbout.app HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 19 contacts → |
“Your 9am class.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Addeventaddevent.comHQ: San Francisco, CA, United StatesReported employees: 11-50 | San Francisco, CA, United States | 11-50 | Exact match | 18 contacts → |
“AddEvent is a cutting-edge software company providing best-in-class calendar marketing and event management solutions to thousands of companies worldwide.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Reclaim.ai From Dropboxreclaim.aiHQ: Portland, OR, United StatesReported employees: 11-50 | Portland, OR, United States | 11-50 | Exact match | 17 contacts → |
“The important stuff doesn't happen just because you write it down.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Calendarcalendar.comHQ: Spokane, WA, United StatesReported employees: 11-50 | Spokane, WA, United States | 11-50 | Exact match | 11 contacts → |
“We are Calendar, trying to make the world a much more productive place.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Zerseyzersey.com HQ: Gurugram, IndiaReported employees: 11-50 | Gurugram, India | 11-50 | Exact match | 9 contacts → |
“Zersey Infotech is a next-gen tech based company that has many brands under its portfolio.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Mobiscrollmobiscroll.com HQ: Targu Mures, RomaniaReported employees: 11-50 | Targu Mures, Romania | 11-50 | Exact match | 7 contacts → |
“Mobiscroll helps engineering teams build complex scheduling, appointment booking, planning, and resource management experiences without starting from scratch or getting locked…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Lectielectie.com HQ: Melbourne, AustraliaReported employees: 1-10 | Melbourne, Australia | 1-10 | Exact match | 7 contacts → |
“Elevate your planning with Lectie's interactive, branded calendars.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Forge Business Relationshipsforgeyournetwork.comHQ: Philadelphia, PA, United StatesReported employees: 1-10 | Philadelphia, PA, United States | 1-10 | Exact match | 5 contacts → |
“Forge stronger relationships in every meeting with the only people-centered calendar app.#forgeyournetwork” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Daybridgedaybridge.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 5 contacts → |
“Stop juggling calendars.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Acumenacumenweb.appHQ: New York, NY, United StatesReported employees: 1-10 | New York, NY, United States | 1-10 | Exact match | 5 contacts → |
“Acumen is a powerful and innovative software that helps individuals and teams achieve their goals by maximizing their productivity.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Mark Space, INCmarkspace.comHQ: Los Gatos, CA, United StatesReported employees: 11-50 | Los Gatos, CA, United States | 11-50 | Exact match | 4 contacts → |
“We're the sync experts!” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Onecalonecal.io HQ: United StatesReported employees: 1-10 | United States | 1-10 | Exact match | 4 contacts → |
“OneCal is a tool that syncs Outlook, iCloud and Google Calendars, provides intuitive scheduling links that make scheduling simple, and allows you to view Outlook, iCloud and…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Fhynixfhynix.comHQ: San Francisco, CA, United StatesReported employees: 1-10 | San Francisco, CA, United States | 1-10 | Exact match | 4 contacts → |
“Fhynix is a daily planner and calendar, built with Open AI, text and voice to help focus on what matters to you and not just tasks and to-dos.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  ET Labsetdevlabs.comHQ: Austin, TX, United StatesReported employees: 1-10 | Austin, TX, United States | 1-10 | Exact match | 4 contacts → |
“ET Labs is a software development company in Austin, Texas devoted to simplicity and productivity.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Sparkeeysparkeey.com HQ: Dublin, IrelandReported employees: 1-10 | Dublin, Ireland | 1-10 | Exact match | 3 contacts → |
“Sparkeey is a mobile calendaring application product with a patented status.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Stamp, INCstamp.appHQ: Albuquerque, NM, United StatesReported employees: 1-10 | Albuquerque, NM, United States | 1-10 | Exact match | 3 contacts → |
“Productivity software to run your business on your device anytime -leveraging the cloud, AI and social tools to optimize your calendar experience.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | RAFTjoinraft.com HQ: Stockholm, SwedenReported employees: 1-10 | Stockholm, Sweden | 1-10 | Exact match | 3 contacts → |
“Raft is a beautiful and fun calendar app designed for couples, families and close friends that want to sync calendars, spend more time together and have things to look forward to.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Calendar On MY Phonecalendaronmyphone.com HQ: United StatesReported employees: 1-10 | United States | 1-10 | Exact match | 3 contacts → |
“In today's fast-paced world, staying on top of your schedule and sharing events seamlessly can be a challenge.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Socircsocirc.co HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 3 contacts → |
“Our user-friendly App lets you effortlessly plan for birthdays, festivals, sports events, holidays, and more.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Time Theory Softwaretimetheorysoftware.com HQ: Portsmouth, United StatesReported employees: 1-10 | Portsmouth, United States | 1-10 | Exact match | 2 contacts → |
“Time Theory Software develops apps for iOS.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Calendarbridgecalendarbridge.comHQ: Miami, FL, United StatesReported employees: 1-10 | Miami, FL, United States | 1-10 | Exact match | 2 contacts → |
“CalendarBridge helps professionals, teams, and organizations manage their multiple calendars seamlessly and with confidence.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Caughtupcaughtup.appHQ: Mclean, VA, United StatesReported employees: 1-10 | Mclean, VA, United States | 1-10 | Exact match | 2 contacts → |
“You have messaging apps for chatting.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 142 company matches
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Calendar software developers: dataset insights
September 27, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
142 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 142 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 27, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Calendar software developers by location
1 lists · largest firstEvery Calendar software developers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Questions about this company list
What does Exact match mean for calendar software developers?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many calendar software developers did RevenueBase find worldwide?
The saved snapshot records 142 matching company records, 517 tracked contacts and 99 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 27, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 calendar software developers worldwide. Snapshot: September 27, 2026. https://revenuebase.ai/companies/browse/calendar-software-developers.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
Company intelligence · public preview
Top 25 calendar software developers worldwide
RevenueBase records 142 matching company records for calendar software developers worldwide, with 517 tracked contacts and 99 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 27, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 calendar software developers worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | 株式会社timetreejubilee.works HQ: 新宿区, JapanReported employees: 11-50 | 新宿区, Japan | 11-50 | Exact match | 48 contacts → |
“TimeTree 500 TimeTree Apple Best of 2015 App Store Watch App Store App StoreApp VERYLEECHANTO Web10 FacebookFbStart 4 120%#02 Web Designing 20163…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Clockwisegetclockwise.com HQ: San Francisco, CA, United StatesReported employees: 51-200 | San Francisco, CA, United States | 51-200 | Exact match | 37 contacts → |
“Clockwise is an AI-powered calendar assistant that builds smarter schedules for everyone by coordinating the way individuals, teams, and companies prefer to work.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Vimcalvimcal.com HQ: New York, United StatesReported employees: 11-50 | New York, United States | 11-50 | Exact match | 19 contacts → |
“Vimcal is the world's fastest calendar, beautifully designed for people who have too many meetings.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Howbouthowbout.app HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 19 contacts → |
“Your 9am class.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Addeventaddevent.com HQ: San Francisco, CA, United StatesReported employees: 11-50 | San Francisco, CA, United States | 11-50 | Exact match | 18 contacts → |
“AddEvent is a cutting-edge software company providing best-in-class calendar marketing and event management solutions to thousands of companies worldwide.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Reclaim.ai From Dropboxreclaim.ai HQ: Portland, OR, United StatesReported employees: 11-50 | Portland, OR, United States | 11-50 | Exact match | 17 contacts → |
“The important stuff doesn't happen just because you write it down.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Calendarcalendar.com HQ: Spokane, WA, United StatesReported employees: 11-50 | Spokane, WA, United States | 11-50 | Exact match | 11 contacts → |
“We are Calendar, trying to make the world a much more productive place.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Zerseyzersey.com HQ: Gurugram, IndiaReported employees: 11-50 | Gurugram, India | 11-50 | Exact match | 9 contacts → |
“Zersey Infotech is a next-gen tech based company that has many brands under its portfolio.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Mobiscrollmobiscroll.com HQ: Targu Mures, RomaniaReported employees: 11-50 | Targu Mures, Romania | 11-50 | Exact match | 7 contacts → |
“Mobiscroll helps engineering teams build complex scheduling, appointment booking, planning, and resource management experiences without starting from scratch or getting locked…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Lectielectie.com HQ: Melbourne, AustraliaReported employees: 1-10 | Melbourne, Australia | 1-10 | Exact match | 7 contacts → |
“Elevate your planning with Lectie's interactive, branded calendars.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Forge Business Relationshipsforgeyournetwork.com HQ: Philadelphia, PA, United StatesReported employees: 1-10 | Philadelphia, PA, United States | 1-10 | Exact match | 5 contacts → |
“Forge stronger relationships in every meeting with the only people-centered calendar app.#forgeyournetwork” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Daybridgedaybridge.com HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 5 contacts → |
“Stop juggling calendars.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Acumenacumenweb.app HQ: New York, NY, United StatesReported employees: 1-10 | New York, NY, United States | 1-10 | Exact match | 5 contacts → |
“Acumen is a powerful and innovative software that helps individuals and teams achieve their goals by maximizing their productivity.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Mark Space, INCmarkspace.com HQ: Los Gatos, CA, United StatesReported employees: 11-50 | Los Gatos, CA, United States | 11-50 | Exact match | 4 contacts → |
“We're the sync experts!” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Onecalonecal.io HQ: United StatesReported employees: 1-10 | United States | 1-10 | Exact match | 4 contacts → |
“OneCal is a tool that syncs Outlook, iCloud and Google Calendars, provides intuitive scheduling links that make scheduling simple, and allows you to view Outlook, iCloud and…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Fhynixfhynix.com HQ: San Francisco, CA, United StatesReported employees: 1-10 | San Francisco, CA, United States | 1-10 | Exact match | 4 contacts → |
“Fhynix is a daily planner and calendar, built with Open AI, text and voice to help focus on what matters to you and not just tasks and to-dos.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | ET Labsetdevlabs.com HQ: Austin, TX, United StatesReported employees: 1-10 | Austin, TX, United States | 1-10 | Exact match | 4 contacts → |
“ET Labs is a software development company in Austin, Texas devoted to simplicity and productivity.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Sparkeeysparkeey.com HQ: Dublin, IrelandReported employees: 1-10 | Dublin, Ireland | 1-10 | Exact match | 3 contacts → |
“Sparkeey is a mobile calendaring application product with a patented status.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Stamp, INCstamp.app HQ: Albuquerque, NM, United StatesReported employees: 1-10 | Albuquerque, NM, United States | 1-10 | Exact match | 3 contacts → |
“Productivity software to run your business on your device anytime -leveraging the cloud, AI and social tools to optimize your calendar experience.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | RAFTjoinraft.com HQ: Stockholm, SwedenReported employees: 1-10 | Stockholm, Sweden | 1-10 | Exact match | 3 contacts → |
“Raft is a beautiful and fun calendar app designed for couples, families and close friends that want to sync calendars, spend more time together and have things to look forward to.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Calendar On MY Phonecalendaronmyphone.com HQ: United StatesReported employees: 1-10 | United States | 1-10 | Exact match | 3 contacts → |
“In today's fast-paced world, staying on top of your schedule and sharing events seamlessly can be a challenge.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Socircsocirc.co HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 3 contacts → |
“Our user-friendly App lets you effortlessly plan for birthdays, festivals, sports events, holidays, and more.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Time Theory Softwaretimetheorysoftware.com HQ: Portsmouth, United StatesReported employees: 1-10 | Portsmouth, United States | 1-10 | Exact match | 2 contacts → |
“Time Theory Software develops apps for iOS.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Calendarbridgecalendarbridge.com HQ: Miami, FL, United StatesReported employees: 1-10 | Miami, FL, United States | 1-10 | Exact match | 2 contacts → |
“CalendarBridge helps professionals, teams, and organizations manage their multiple calendars seamlessly and with confidence.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Caughtupcaughtup.app HQ: Mclean, VA, United StatesReported employees: 1-10 | Mclean, VA, United States | 1-10 | Exact match | 2 contacts → |
“You have messaging apps for chatting.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 142 company matches
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Calendar software developers: dataset insights
September 27, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
142 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 142 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 27, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Calendar software developers by location
1 lists · largest firstEvery Calendar software developers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Questions about this company list
What does Exact match mean for calendar software developers?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many calendar software developers did RevenueBase find worldwide?
The saved snapshot records 142 matching company records, 517 tracked contacts and 99 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 27, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 calendar software developers worldwide. Snapshot: September 27, 2026. https://revenuebase.ai/companies/browse/calendar-software-developers.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗