Calendar and Contact Sync Tools
Calendaring and contacts are some of the most sensitive data posess. Use only products that use end-to-end encryption (E2EE) at rest. This prevents a provider from reading your data.
Software as a service (SaaS) only
These products are included with an subscription to the respective email providers.
Proton Calendar
Proton Calendar is an calendar app that is available to ProtonMail users. All data stored within it is end-to-end encrypted when stored on ProtonMail’s servers.
Tutanota Calendar
Tutanota has an encrypted calendar in their desktop and mobile clients.
Self-hostable
Some of these options are self-hostable, or able to be hosted by third party providers for a fee:
EteSync
EteSync is a secure, end-to-end encrypted, and privacy-respecting cloud backup and synchronization software for your personal information (e.g. contacts and calendars). There are native clients for Android, iOS, and the web, and an adapter layer for most desktop clients.
EteSync also offers optional software as a service for $24 per year to use, or you can host the server yourself for free.
Nextcloud
Nextcloud is a suite of client-server software for creating and using file hosting services. This includes calendar sync via CalDAV and contacts sync via CardDAV. Nextcloud is free and open-source, thereby allowing anyone to install and operate it without charge on a private server.
You can self host Nextcloud or pay for service from a provider.
DecSync
DecSync can be used to synchronize RSS, contacts, calendars and tasks without a server by using file synchronization software such as Syncthing.
Privacy Guides is a socially motivated website that provides information for protecting your data security and privacy.
Unless otherwise noted, the original content on this website is made available under a CC0 1.0 Universal Public Domain Dedication.
This content was made available by the Privacy Guides team and contributors. Get involved! | Open an Issue | Privacy Policy | Website Terms & Notices