The Best Open Source Google Calendar AlternativesTop Calendar Apps like Google Calendar
The best open source alternative to Google Calendar is Etar. If that doesn't suit you, our users have ranked more than 100 alternatives to Google Calendar and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Google Calendar are Calendar Lock PEA, Fossify Calendar, Tuta Calendar and Nextcloud Calendar.
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Google Calendar alternatives are mainly Calendar Apps, but if you're looking for Todo List Managers or Email Clients you can filter on that. Other popular filters include Android + Open Source and Windows + Open Source. 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 Google Calendar.- Calendar App
- Free • Proprietary
License model
- Free • Open Source
Application type
Country of Origin
Germany
EU
Platforms
- Android
- Android Tablet
- F-Droid
Comments about Etar as an Alternative to Google Calendar
Top Positive CommentTop Negative CommentThird OpinionImport and export function is listed but it didnt work for me at all. Worse, on my latest phone I could not even import an ICS file with all my stuff.
Most Recent Commentdoes not conform to UNIX principles (let the application be one, but it will work well and cooperate with other functions and applications in the system); The interface is hideous. Nothing is anywhere, it's hard to figure out; It is not practical. Notion Calendar or Apple Calendar for example have a lot of common handy features that Etar doesn't have;
- 67 Calendar Lock PEA alternatives
Calendar encryption: View calendars and stores them encrypted on your device or in the cloud.
- 49 Fossify Calendar alternatives
Your privacy-aware, open-source calendar with intuitive design and multi-platform syncing.
License model
- Free • Open Source
Application type
Country of Origin
India
Platforms
- Android
- Android Tablet
- F-Droid
Comments about Fossify Calendar as an Alternative to Google Calendar
Customizable and you have control over your data.
- 30 Tuta Calendar alternatives
Tuta Calendar offers secure event organization with end-to-end encryption and no ads or tracking. Enjoy multi-device sync, multiple calendar views, and offline access. Fully compliant with strict German data protection laws. Manage recurring events, unlimited calendars, and seamlessly integrate with Tuta Mail.
License model
- Freemium • Open Source
Application type
Country of Origin
Germany
EU
Platforms
- Online
- Android
- iPhone
- Android Tablet
- iPad
- F-Droid
Comments about Tuta Calendar as an Alternative to Google Calendar
JOPloumeEnd-to-end encryption and works across all platforms: for me, on Android, Mac, and Windows (and even via Browser)!
- 31 Nextcloud Calendar alternatives
The Calendar app is a user interface for Nextcloud's CalDAV server. Easily sync events from various devices with your Nextcloud and edit them online.
License model
- Free • Open Source
Application type
Country of Origin
Germany
EU
Platforms
- Online
- Self-Hosted
- Nextcloud
Comments about Nextcloud Calendar as an Alternative to Google Calendar
Free (and open source) alternative. Your data is yours !
- 54 fruux alternatives
fruux is a free service that takes care of your contacts, calendars and more so you don't have to. Never manually copy contacts and calenders between your devices again!
License model
- Freemium • Open Source
Application type
Country of Origin
Germany
EU
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Blackberry
- Windows Phone
- iPad
- Blackberry 10
- Sailfish OS
- Software as a Service (SaaS)
fruux Features
License model
- Free • Open Source
Application types
Country of Origin
Germany
EU
Platforms
- Linux
- Flathub
Kontact Features
- 47 Kolab Community alternatives
Kolab is entirely Free and Open Source Software (a.k.a. FOSS), and uses Open Standards. We’ll get to why this is important to us, and hope that it is important to you thereafter.
License model
- Freemium • Open Source
Application types
Country of Origin
Switzerland
Platforms
- Linux
- Online
- Self-Hosted
Kolab Community Features
Merkuro is a calendar and contact application that allows you to manage your tasks, events and contacts. Merkuro supports both local calendars as well as a multitude of online calendars: Nextcloud, Google® Calendar, Outlook®, Caldav, and many more.
License model
- Free • Open Source
Application types
Country of Origin
Germany
EU
Platforms
- Linux
Nice, clean, and to the point calendar!