Open Source Calendly AlternativesTop Appointment Schedulers and other similar apps like Calendly

The best open source alternative to Calendly is Cal.com. It's not free, so if you're looking for a free alternative, you could try Cal.com or Thunderbird Appointment. If that doesn't suit you, our users have ranked more than 100 alternatives to Calendly and 16 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Calendly are meetergo, Zaptime, Calendula and DFN Scheduler.

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Alternatives list

  1. Cal.com icon

    Cal.com

     33 likes

    Open-source scheduling tool offering self-hosted or hosted deployment, complete white-label branding, API-driven customization, data ownership, online booking management, flexible embedding, privacy, and integration for business meetings, seminars, and more.

    103 Cal.com alternatives

    Cost / License

    • Free Personal
    • Open Source (MIT)

    Application types

    Platforms

    • Android
    • Self-Hosted
    • Google Chrome
    • Software as a Service (SaaS)
    • Cloudron
    • Windows
    • Mac
    • Linux
    • Safari
    • Mozilla Firefox
    • iPhone
    • Online
    Cal.com screenshot 1
     
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    4
    Cal.com vs Calendly Comments
    Ada Byron
    Positive
    2

    Not dependent on JavaScript and open source. Honestly, more and more businesses are locking down JS to only trusted sites or ones they use internally. Calendly depends on it, and I had some people not be able to use it because of this. Cal provides you the same kind of functionality and is much easier to manager. Calendly does have some added functionality but as I found out

    phytographer
    Positive
    0

    Offers multiple appointment types for free

    tangycandy
    Positive
    0

    Cal.com (formerly Calendly) is the BEST alternative to Calendso that I've tried, and offers additional intergrations. Their free tier is also a lot more generous, and if you want to self-host, there are simple ways of doing so via Railway.

    3 of 4 comments
    • Cal.com is Free Personal and Open SourceCalendly is Freemium and Proprietary
    • Cal.com is Privacy focused and CustomizableCalendly is not according to our users
  2. Thunderbird Appointment icon

    Thunderbird Appointment

     19 likes

    Coordinate meetings by setting your availability, sharing a booking link via email or website, planning one-off or recurring events, integrating your calendar to see appointments in one view, and simplifying scheduling by replacing manual back-and-forth.

    89 Thunderbird Appointment alternatives

    Cost / License

    Application type

    Platforms

    • Online
    Thunderbird Appointment screenshot 1
     
  4. Easy!Appointments icon

    Easy!Appointments

     10 likes

    Easy!Appointments is a highly customizable web application that allows your customers to book appointments with you via the web. Moreover, it provides the ability to sync your data with Google Calendar so you can use them with other services.

    96 Easy!Appointments alternatives

    Cost / License

    Application type

    Platforms

    • Self-Hosted
    • Cloudron
    • Wordpress
    Easy!Appointments screenshot 1
     
  5. Ad
    Screenshot
    Cal.com icon
    Cal.com

    Get a 20% discount on Cal.com with AlternativeTo!

    Open-source scheduling tool offering self-hosted or hosted deployment, complete white-label branding, API-driven customization, data ownership, online booking management, flexible embedding, privacy, and integration for business ...

    https://cal.com
    Learn More
  6. meetergo icon

    meetergo

     3 likes

    AI-powered platform automates appointment booking via email, stores data in Germany for full GDPR compliance, supports team scheduling, payments, reminders, integrations with 90+ services, offers instant setup, multi-language support, and enterprise features.

    Cost / License

    • Freemium
    • Open Source (MIT)

    Application type

    Platforms

    • Online
    • Software as a Service (SaaS)
    meetergo screenshot 1
     
  8. Zaptime icon

    Zaptime

     Like

    Personalized scheduling of your meetings and calls. Meet Zaptime! 📅 Connect your Google Calendar or iCloud Calendar, customize your availability, and wave goodbye to double bookings. Your schedule, supercharged!.

    Cost / License

    • Freemium
    • Open Source

    Platforms

    • Online
    Bookings inside Zaptime application
     
  9. Calendula icon

    Calendula

     Like

    A modern Material 3 Expressive calendar for Android. Reads, writes, and reminds — on top of the system calendar, with zero network access.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Android
    • Android Tablet
    • F-Droid
    • Obtainium
    Calendula screenshot 1
     
  10. DFN Scheduler icon

    DFN Scheduler

     1 like
    • an Framadate installation - Easy and fast coordination of appointments that pays special attention to the protection of data. All data used are exclusively stored in Germany.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Online
    DFN Scheduler screenshot 1
     
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    1
    DFN Scheduler vs Calendly Comments
    Guest
    Negative
    0

    Like Doodle pollot calendly

    • DFN Scheduler is Free and Open SourceCalendly is Freemium and Proprietary
  12. hash-calendar icon

    hash-calendar

     1 like

    lightweight, client-only calendar web application. All data persists in the URL hash for instant sharing, No backend required. Optional AES-GCM password protection keeps shared links locked without a server.

    Cost / License

    • Freemium
    • Open Source (MIT)

    Application type

    Platforms

    • Online
    • Self-Hosted
    • Docker
    • YunoHost
    hash-calendar screenshot 1
     
  13. Nextcloud Polls icon

    Nextcloud Polls

     10 likes

    A polls app, similar to doodle/dudle with the possibility to restrict access (members, certain groups/users, hidden and public).

    Cost / License

    Application type

    Platforms

    • Online
    • Self-Hosted
    Nextcloud Polls screenshot 1
     
  15. C

    Croodle

     2 likes

    Croodle is a web application to schedule a date or to do a poll on a general topics. All data like title and description, number and labels of options and available answers and names of users are encrypted/decrypted in the browser using 256 bits AES.

    Cost / License

    • Free
    • Open Source (MIT)

    Application types

    Platforms

    • Linux
    • Online
    • Self-Hosted
    • PHP
     
12 of 16 Calendly alternatives