OurCal vs Proton Calendar

OurCal

• Couples and families split between iPhone and Android
• Groups that want their shared calendar end-to-end encrypted
• Shift workers sharing a rota with family and friends
• People who want the discussion about a plan kept inside the event

Proton Calendar

• People who want event details kept unreadable to the provider
• Existing Proton Mail users who want invitations handled in the inbox
• Privacy-focused organizations standardizing on Proton's business suite

OurCal

• There is no free plan: when the trial ends the group is paused until a member subscribes.
• Each group needs its own subscription, so a family group and a work group are billed separately.
• Billing is monthly only. OurCal says annual plans were retired on August 1, 2025.
• No web or Windows app is listed, and pushing OurCal events out to other calendars is not yet available on Android.

Proton Calendar

• Proton Free allows 3 personal calendars; Mail Plus and higher plans allow 25.
• Calendar sharing and booking pages need a paid plan, and Mail Plus and Proton Unlimited include only 1 booking page.
• Calendar has no subscription of its own: paid features come with Mail Plus, Proton Unlimited or a business plan.
• Desktop use is through the Proton Mail app for Mac, Windows and Linux, a 14-day trial on free accounts; the Linux app is labeled beta.

OurCal

Chat on every event

Each event has its own thread for messages, photos, files and notes, with reactions, replies and quotes. A separate group chat covers anything that does not belong to one event.

Automatic change tracking

When someone edits an event, a before-and-after update is posted automatically in the event chat and the activity feed, and reminders go to the members concerned.

End-to-end encryption by default

Every profile, group, calendar, event, message and file is end-to-end encrypted. The encryption is provided by Seald, whose technology is certified by ANSSI, France's cybersecurity agency.

Calendar sync in both directions

Google, Microsoft and Apple iCloud calendars, plus subscribed calendars, can be shared with a group. OurCal events can be pushed out to a calendar on the device from iPhone, iPad and Mac.

Natural-language event creation

Typing a phrase such as "Dentist Tuesday 3pm for an hour" creates the event, and reminders, to-dos and repeating events work the same way. The vendor says this runs on the device.

Multiple groups and availability sharing

Each group has its own calendars, members and chat, and a person can join any number of groups. Busy times can be shared group by group without revealing event details.

Proton Calendar

End-to-end encrypted events

An event's title, description, location and attendees are encrypted on your device. Events received from people on other calendar services are stored with zero-knowledge encryption.

Appointment booking pages

Publish a booking page that shows only the times you choose and syncs with your calendars to prevent double bookings. Confirmed meetings can include a Proton Meet link. Paid plans only.

Calendar sharing

On paid plans, share a calendar by link or by inviting people directly, showing either full event details or only your availability.

Works with Proton Mail

Send invitations from a Proton Mail address, manage them without leaving the inbox, and add events received by email, such as flights or meetings, to the calendar.

Recurring events and reminders

Events can repeat daily, weekly, monthly or on a custom pattern, with several reminders or email alerts each. Views switch between day, week and month.

Import and calendar subscriptions

The Easy Switch tool imports existing calendars from other providers, and you can subscribe to calendars that other people keep on a different service.

OurCal

• Up to 6 people$6.99

  per month for the whole group

  For couples and small families. One member subscribes and everyone else in the group joins free. Every feature is included.

• Up to 20 people$12.99

  per month for the whole group

  For bigger families and friend groups, with the same features as the other tiers.

• Up to 100 people$29.99

  per month for the whole group

  For clubs, teams and communities, up to the 100-member limit of a group.

Proton Calendar

• Proton Free$0

  3 personal calendars, end-to-end encryption, and sending and receiving invitations.

• Mail Plus$3.99

  per month, billed every 12 months ($47.88); $4.99 billed monthly

  25 personal calendars, calendar sharing and 1 booking page, plus 15 GB of storage and 10 email addresses.

• Proton Unlimited$9.99

  per month, billed every 12 months ($119.88); $12.99 billed monthly

  The same calendar features as Mail Plus, bundled with 500 GB of storage and Proton's VPN, password manager and cloud storage.

• Workspace Standard$12.99

  per user / month, billed every 12 months ($155.88)

  Business suite with 25 calendars and 25 booking pages per user, 1 TB of storage per user and 15 custom email domains.

• Workspace Premium$19.99

  per user / month, billed every 12 months ($239.88)

  Everything in Workspace Standard, plus 3 TB of storage per user, 20 custom email domains and data retention policies.

• EnterpriseCustom

  All Proton services in a customizable package with a dedicated account manager; priced through sales.

OurCal

No public discounts listed.

Proton Calendar

• Annual discount

  20% off Mail Plus on the 12-month plan

  Proton's pricing page lists Mail Plus at $3.99 a month when billed every 12 months ($47.88), against $4.99 billed monthly. Proton Unlimited is $9.99 instead of $12.99.

• Education

  Student discount for the first 12 months

  Students verified through Student Beans get 50% off Mail Plus and 62% off Proton Unlimited for the first 12 months; the plan then renews at the regular price.

• Nonprofit

  Reduced pricing for registered nonprofits

  Registered nonprofits can request discounted pricing on Proton's business plans from the sales team. No fixed percentage is published.