Average Ratings 1 Rating

Total
ease
features
design
support

Average Ratings 1 Rating

Total
ease
features
design
support

Description

Your calendar serves as a comprehensive record of your life, and Proton Calendar prioritizes your privacy. With automatic end-to-end encryption, Proton Calendar ensures that all your events remain secure. Events shared by users of other calendars are protected through zero-knowledge encryption, guaranteeing that details such as titles, descriptions, locations, and guest lists remain confidential, even from Proton. This service allows you to efficiently manage your schedule while safeguarding your personal information. Developed by the creators of Proton Mail, which is recognized as the largest encrypted email provider globally, Proton Calendar has attracted over 50 million users, including prominent organizations. Additionally, Proton Calendar includes a Proton Mail address for sending secure event invitations, enhancing your organization capabilities. You can conveniently add new events to your calendar directly from your Proton Mail inbox, streamlining your scheduling process even further.

Description

SYNCDATE keeps several calendars honest about when one person is busy. It is for anyone who holds a calendar at more than one organisation: a consultant with a calendar at every client, a fractional executive, an agency owner, or someone with a day job and a business on the side. Connect each account over OAuth: Google Calendar, Microsoft Outlook or Microsoft 365, iCloud, Fastmail, Nextcloud or any CalDAV server. Choose which calendars feed which, one way or both ways. From then on, a meeting booked at one company blocks the time at the others. Subscribed iCal feeds can be used as a read-only source. A copy says what you decide. By default a copy shows Busy and nothing else, except in a two-way sync between calendars you own, which keeps the real titles. You can write your own text for the title, description and location on every plan. The Plus plan adds if/otherwise rules that look at an event's length, start time, weekday or a guest's email domain. The Pro plan lets each calendar in one sync follow its own rule. Google and Outlook changes usually reach the other calendar in under a minute. CalDAV calendars are checked about every 15 minutes. Every run is recorded and shown on the dashboard with the state of each sync. SYNCDATE only adds and removes its own copies, never edits your original events, and when you delete a sync it can remove everything it created. The free plan holds two calendars across two accounts with no card and no time limit. Plus and Pro add accounts, calendars, range and rules, with a 7-day trial. Team gives every seat the Pro plan on one invoice; the administrator sees plan status and sync health, never anyone's events. Hosted in the EU. The same account can be used from an AI assistant over MCP.

API Access

Has API No 

API Access

Has API No 

Screenshots View All

Screenshots View All

Integrations

Google Calendar No 
Proton Mail Yes 

Integrations

Google Calendar Yes 
Proton Mail No 

Pricing Details

Free
Free Trial No 
Free Version Yes 

Pricing Details

Free
Paid from $1.99/month
Free Trial No 
Free Version Yes 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App Yes 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Proton AG

Founded

2014

Country

Switzerland

Website

proton.me/calendar

Vendor Details

Company Name

DUMA DIGITAL SOLUTIONS S.R.L.

Founded

2025

Country

Bucharest, Romania

Website

syncdate.app

Product Features

Appointment Scheduling

Appointment Reminders No 
Automated Scheduling No 
Calendar Sync No 
Client Database No 
Group Scheduling No 
Mobile Access No 
Multi-Location No 
Online Booking No 
Online Payments No 
Recurring Appointments No 
Room Booking Management No 

Calendar

Calendar Sync No 
Collaboration Tools No 
Multi-Device Support No 
Reminders No 
Room Booking No 
Scheduling No 
Task Manaagement No 

Productivity

Collaboration No 
Database Creation No 
Document Creation No 
File Sharing No 
Notes Management No 
Office Suite No 
Presentation Tools No 
Project Management No 
Task Management No 
Team Chat No 

Product Features

Calendar

Calendar Sync No 
Collaboration Tools No 
Multi-Device Support No 
Reminders No 
Room Booking No 
Scheduling No 
Task Manaagement No 

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