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BusyCal alternatives · Calendar

Open-source alternatives to BusyCal

BusyCal is not described as open source on its own site. 11 of the 75 other calendar and scheduling apps in this directory are open source, according to their own sites.

BusyCal has a free plan. Paid plans start at $49.99 one-time for Mac, or $39.99 per year on the Mac App Store; iOS app $9.99. All of them are free or have a free plan.

11 tools · Listings checked up to Oct 9, 2026 · Where the facts come from

How each one differs from BusyCal

  1. Itsycal

    Free, tiny menu bar calendar for the Mac

    • Itsycal is free. BusyCal starts at $49.99 one-time for Mac, or $39.99 per year on the Mac App Store; iOS app $9.99.
    • Only BusyCal lists an iOS app.
    • Itsycal is open source, according to its own site.
    • BusyCal can be bought with a one-time purchase.
    Itsycal vs BusyCalItsycal pricing and details

  2. MeetingBar

    Free Mac menu bar app that shows and joins your next meeting

    • MeetingBar is free. BusyCal starts at $49.99 one-time for Mac, or $39.99 per year on the Mac App Store; iOS app $9.99.
    • Only BusyCal lists an iOS app.
    • MeetingBar is open source, according to its own site.
    • BusyCal can be bought with a one-time purchase.
    MeetingBar pricing and details

  3. Fossify Calendar

    Open-source Android calendar with no ads, tracking or account

    • Fossify Calendar is free. BusyCal starts at $49.99 one-time for Mac, or $39.99 per year on the Mac App Store; iOS app $9.99.
    • Only Fossify Calendar lists an Android app.
    • Only BusyCal lists macOS and iOS apps.
    • Fossify Calendar is open source, according to its own site.
    Fossify Calendar pricing and details

  4. Etar

    Open-source Material Design calendar for Android

    • Etar is free. BusyCal starts at $49.99 one-time for Mac, or $39.99 per year on the Mac App Store; iOS app $9.99.
    • Only Etar lists an Android app.
    • Only BusyCal lists macOS and iOS apps.
    • Etar is open source, according to its own site.
    Etar pricing and details

  5. GNOME Calendar

    Free, open-source calendar app for the GNOME desktop on Linux

    • GNOME Calendar is free. BusyCal starts at $49.99 one-time for Mac, or $39.99 per year on the Mac App Store; iOS app $9.99.
    • Only GNOME Calendar lists a Linux app.
    • Only BusyCal lists macOS and iOS apps.
    • GNOME Calendar is open source, according to its own site.
    GNOME Calendar pricing and details

  6. Merkuro Calendar

    Open-source calendar and task app from KDE for Linux

    • Merkuro Calendar is free. BusyCal starts at $49.99 one-time for Mac, or $39.99 per year on the Mac App Store; iOS app $9.99.
    • Only Merkuro Calendar lists a Linux app.
    • Only BusyCal lists macOS and iOS apps.
    • Merkuro Calendar is open source, according to its own site.
    Merkuro Calendar pricing and details

  7. Proton Calendar

    End-to-end encrypted calendar from the maker of Proton Mail

    • Proton Calendar starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly. BusyCal starts at $49.99 one-time for Mac, or $39.99 per year on the Mac App Store; iOS app $9.99.
    • Only Proton Calendar lists a web app.
    • Only Proton Calendar lists Windows, Linux and Android apps.
    • Proton Calendar is open source and end-to-end encrypted, according to its own site.
    Proton Calendar pricing and details

  8. Tuta Calendar

    End-to-end encrypted calendar bundled with Tuta Mail

    • Tuta Calendar starts at €3 per month, paid yearly (€3.60 paid monthly). BusyCal starts at $49.99 one-time for Mac, or $39.99 per year on the Mac App Store; iOS app $9.99.
    • Only Tuta Calendar lists a web app.
    • Only Tuta Calendar lists Windows, Linux and Android apps.
    • Tuta Calendar is open source and end-to-end encrypted, according to its own site.
    Tuta Calendar pricing and details

  9. Timeful

    Free, open-source group availability poll with calendar autofill

    • Timeful is free. BusyCal starts at $49.99 one-time for Mac, or $39.99 per year on the Mac App Store; iOS app $9.99.
    • Only Timeful lists a web app.
    • Only BusyCal lists macOS and iOS apps.
    • Timeful is open source and self-hostable, according to its own site.
    Timeful pricing and details

  10. Rallly

    Open-source meeting polls for finding a time that suits a group

    • Rallly starts at $6 per seat / month, billed yearly ($10 billed monthly). BusyCal starts at $49.99 one-time for Mac, or $39.99 per year on the Mac App Store; iOS app $9.99.
    • Only Rallly lists a web app.
    • Only BusyCal lists macOS and iOS apps.
    • Rallly is open source and self-hostable, according to its own site.
    Rallly pricing and details

  11. Crab Fit

    Free, open-source availability heat map for group events

    • Crab Fit is free. BusyCal starts at $49.99 one-time for Mac, or $39.99 per year on the Mac App Store; iOS app $9.99.
    • Only Crab Fit lists a web app.
    • Only Crab Fit lists an Android app.
    • Only Crab Fit lists a browser extension.
    Crab Fit pricing and details

Common questions

Is there an open-source alternative to BusyCal?

Yes. Itsycal, MeetingBar, Fossify Calendar, Etar, GNOME Calendar, Merkuro Calendar, Proton Calendar, Tuta Calendar and 3 more are open source, according to their own sites.

Is BusyCal open source?

BusyCal is not described as open source on its own site. The listing was checked on Oct 5, 2026 against the pages it cites.

When was this checked?

Each listing shows its own date. On this page they run from Oct 5, 2026 to Oct 9, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.

This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to BusyCal: the alternatives its listing names first, then the tools that share the most features with it.