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 nine of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Calendly are meetergo, Zaptime, DFN Scheduler and Meetsy.

filter to find the best alternatives

Calendly alternatives are mainly Appointment Schedulers, but if you're looking for Calendar Apps or Poll Makers you can filter on that. Other popular filters include Open Source and Free. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Calendly.
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Alternatives list

  1. Cal.com icon

    Cal.com

     29 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.

    69 Cal.com alternatives

    Cost / License

    • Free Personal
    • Open Source

    Application type

    Platforms

    • Android
    • Self-Hosted
    • Google Chrome
    • Software as a Service (SaaS)
    • Cloudron
    Cal.com screenshot 1
    Promotion 😀

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    3
    9
    Comments about Cal.com as an Alternative to Calendly
    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

    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.

    Guest
    Positive
    1

    More features, pretty, and OSS.

    Review by a new / low-activity user.
    Cal.com icon
    Cal.com icon

    • Almost everyone thinks Cal.com is a great Calendly alternative.

    • Cal.com is Free Personal and Open SourceCalendly is Freemium and Proprietary
  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.

    73 Easy!Appointments alternatives

    Cost / License

    Application type

    Platforms

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

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    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 ...

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  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.

    29 meetergo alternatives

    Cost / License

    • Freemium
    • Open Source (MIT)

    Application type

    Platforms

    • Online
    • Software as a Service (SaaS)
    meetergo screenshot 1
     
  7. 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
     
  8. 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
    Comments about DFN Scheduler as an Alternative to Calendly
    Guest
    Negative
    0

    Like Doodle pollot calendly

    Review by a new / low-activity user.
    DFN Scheduler icon
    DFN Scheduler icon
    • DFN Scheduler is Free and Open SourceCalendly is Freemium and Proprietary
  11. Ink-In-Time icon

    Ink-In-Time

     3 likes

    Appointment scheduling/booking application that aims to be super-simple, and open source!

    Cost / License

    • Free
    • Open Source (MIT)

    Platforms

    • Linux
    • Online
    • Self-Hosted
    Ink-In-Time screenshot 1
     

  12. 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 type

    Platforms

    • Linux
    • Online
    • Self-Hosted
    • PHP
     
9 of 9 Calendly alternatives