These buttons open the developer's own site, repository or store listing in a new tab. wares.gg does not host downloads.
About Proton Calendar
Proton Calendar encrypts events end to end, including the title, description, location and invitees, so Proton cannot read them. Events received from people using other calendars are stored with zero-knowledge encryption. It includes scheduling that updates your availability and adds confirmed meetings to the calendar.
Proton is based in Switzerland. The calendar works alongside Proton Mail and is available in the browser and as apps for iOS and Android. A free account is available, and there is a business offering.
Strengths
- End-to-end encryption of event details
- Built-in scheduling for booking meetings
- Integrates with Proton Mail
Limitations
- Requires a Proton account
- Works best within the Proton ecosystem
Details
- Pricing
- FreemiumFree account available, with paid Proton plans and a business version.
- License
- Proprietary
- Developer
- Proton
- Platforms
- Android, iOS, Web
- How it runs
- Downloadable app, Web application, Hosted service
- Account
- Required
- Best suited for
- People who want a private calendar, especially Proton Mail users
- Categories
- Office tools, Privacy tools
- Last verified
- Added
- Provenance
- Facts checked against the developer's own pages and store listings, 1 sources on file.
Alternatives to Proton Calendar
Compare allSoftware that can replace Proton Calendar for an important use case, and what changes if you switch.
Google Calendar
Google's free web calendar for scheduling events, used with a Google account and synced across devices.
Google Calendar is free and widely supported by other tools, but events are stored on Google's servers without end-to-end encryption and it requires a Google account.
Microsoft Outlook
Microsoft's email, calendar and contacts app for desktop, mobile and the web.
Microsoft Outlook combines email, calendar and contacts on desktop, mobile and web within Microsoft 365, but is closed source and tied to Microsoft services instead of encryption.
Fastmail
A paid, privacy-focused email, calendar and contacts service with web and mobile apps.
Fastmail is a paid email, calendar and contacts service with EU or USA data residency and custom domains, but it does not describe end-to-end encrypted events.
Fantastical
A calendar and tasks app with natural language event entry for Mac, Windows and iOS.
Fantastical is a calendar client for Mac, Windows and iOS that merges many calendars with natural language entry, but has no Android version and premium features cost extra.
Notion Calendar
A free calendar app, formerly Cron, that works with Google Calendar and Notion workspaces.
Notion Calendar is a free app for Windows, macOS, Android and iOS with scheduling links, but it is built around Google Calendar and Notion rather than encryption.
Mailfence
Encrypted email service from Belgium with OpenPGP support, calendars, contacts and document storage.
Mailfence is a Belgian encrypted email service with OpenPGP, calendar, contacts and documents in one account, offering standard IMAP access and a free tier.
BusyCal
A calendar app for Mac, iPhone and iPad with tasks, smart filters and natural language entry.
BusyCal is a paid calendar app for Mac, iPhone and iPad that works with iCloud, Google, Exchange and CalDAV, but runs only on Apple platforms.
Etar
An open-source Material Design calendar app for Android.
Etar is a free GPL-3.0 Android calendar with no proprietary components, whose sync depends on the accounts set up on the phone.
Proton Calendar as an alternative
Listings that name Proton Calendar as an alternative.
calcurse
A text-based calendar and to-do application for the terminal with reminders and scripting options.
Proton Calendar moves events into an end-to-end encrypted web and mobile calendar, but it requires a Proton account and has no terminal interface.
Vimcal
A keyboard-driven calendar that combines Google and Outlook calendars and helps share availability across time zones.
Proton Calendar end-to-end encrypts event details and includes booking, but requires a Proton account and works best within the Proton ecosystem.
Similar software
Related functionality, not necessarily a direct replacement.
Calendly
A hosted meeting scheduler that shares booking pages so others can pick an open slot.
Cal.com
Open-source scheduling software for online bookings that can be used hosted or self-hosted.
DAVx⁵
An Android app that syncs contacts, calendars and tasks over CardDAV and CalDAV and accesses WebDAV files.
Radicale
A small self-hosted CalDAV and CardDAV server for keeping calendars and contacts on your own machine.
Baïkal
A lightweight self-hosted CalDAV and CardDAV server for syncing your own calendars and contacts.
HEY
An email and calendar service from 37signals that screens senders before they reach your inbox.
