Best Proton Calendar Alternatives in 2026
The top Proton Calendar alternatives are Google Calendar, Microsoft Outlook and Zoho Calendar: 15 calendar apps our editors would look at instead of Proton Calendar, in our ranking order.
Proton Calendar: A privacy-focused calendar with free scheduling tools and limited two-way sync. Where it falls short: external calendar synchronization is one-way.
Switching from Proton Calendar? For most calendar apps buyers the best Proton Calendar alternative is Google Calendar, built for most individuals and Google Workspace teams.
Why People Look for a Proton Calendar Alternative
- External calendar synchronization is one-way
- Narrower integration set than general-purpose calendars
- Calendar is bundled with Proton Mail plans
Quick Picks by What You Need
- Best overallGoogle Calendar9.4
Most individuals and Google Workspace teams
Visit Google Calendar - Lowest priceGoogle Calendar9.4
Paid plans from $7/user/mo
Visit Google Calendar - Best free optionGoogle Calendar9.4
Has a free plan
Visit Google Calendar
All 15 Proton Calendar Alternatives, Ranked
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
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Best forMost individuals and Google Workspace teams
- Better than Proton Calendar:
- Editor score 9.4 vs 8.8
A versatile calendar for personal schedules and Google Workspace collaboration.
- Scheduling links
- Time blocking
- Video meeting support
9.4/10★★★★★Try Google Calendar -
Best forMicrosoft-centered individuals and organizations
- Better than Proton Calendar:
- Editor score 9.2 vs 8.8
A flexible calendar choice for people and teams already working in Microsoft’s ecosystem.
- Video meeting support
- Shared calendars
9.2/10★★★★★Visit site -
Best forBudget-conscious teams needing rich scheduling
- Better than Proton Calendar:
- Editor score 9.1 vs 8.8
A low-cost calendar with booking, sync, room reservations, and broad integrations.
- Scheduling links
- Time blocking
- Video meeting support
9.1/10★★★★★Visit Zoho Calendar -
Best forNotion users wanting calendar-database integration
- Better than Proton Calendar:
- Editor score 9.0 vs 8.8
A free calendar with two-way connections and unusually close Notion integration.
- Scheduling links
- Time blocking
- Video meeting support
9.0/10★★★★☆Try Notion Calendar -
Best forSelf-hosting teams needing collaborative scheduling
- Better than Proton Calendar:
- Editor score 8.9 vs 8.8
A collaborative calendar for teams that want self-hosting, sharing, and booking links.
- Scheduling links
- Video meeting support
- Shared calendars
8.9/10★★★★☆Visit Nextcloud -
Best forPolls, bookings, and paid appointments
A scheduling-focused calendar app for polls, booking pages, reminders, and payments.
8.7/10★★★★☆Visit Doodle -
Best forLinux users needing open-source group calendaring
A capable Linux group calendar for users who value open standards and source freedom.
- Shared calendars
8.6/10★★★★☆Visit KDE -
Best forUsers prioritizing encrypted calendar privacy
A privacy-focused calendar with sharing, invitations, and broad device support.
- Shared calendars
8.5/10★★★★☆Visit Tuta Calendar -
Best forPrivacy-focused users needing broad device access
A paid Fastmail bundle for shared calendars, invitations, and two-way external sync.
- Shared calendars
8.4/10★★★★☆Visit Fastmail -
Best forAndroid users needing a straightforward calendar
A capable free calendar for Galaxy users, with broad views and account consolidation.
- Shared calendars
8.3/10★★★★☆Try Samsung Calendar -
Best forOrganizations wanting an all-in-one work suite
A broad work suite that brings calendar tools into messaging, meetings, and collaboration.
8.1/10★★★★☆Visit Lark -
Best forOrganizations managing shared operational calendars
A flexible shared calendar for organizations that need structured scheduling and permissions.
- Time blocking
- Shared calendars
8.0/10★★★★☆Visit Teamup -
Best forFamilies coordinating schedules and household tasks
A family-focused organizer that combines shared calendars, lists, meals, and recipes.
- Video meeting support
- Shared calendars
7.9/10★★★★☆Visit Cozi -
Best forFamilies and groups sharing schedules
A social shared calendar with useful group planning tools and one-way external calendar sync.
- Shared calendars
7.8/10★★★★☆Visit TimeTree -
Best forOrganizations publishing public calendars
A paid calendar platform for public events, shared scheduling, resources, and RSVPs.
- Shared calendars
7.7/10★★★★☆Visit CalendarWiz
Proton Calendar Alternatives: Common Questions
What is the best alternative to Proton Calendar?
Google Calendar: #1 in our Calendar Apps ranking, with an editor score of 9.4 out of 10. A versatile calendar for personal schedules and Google Workspace collaboration.
Is there a free alternative to Proton Calendar?
Yes. Google Calendar, Microsoft Outlook, Zoho Calendar, Notion Calendar and Nextcloud Calendar have a free plan or a free tier (13 of the 15 alternatives on this page).
What is the cheapest paid alternative to Proton Calendar?
Of the alternatives here that publish a price, Google Calendar starts lowest, at $7/user/mo.
Why do people look for Proton Calendar alternatives?
External calendar synchronization is one-way; Narrower integration set than general-purpose calendars; Calendar is bundled with Proton Mail plans.
How do I switch from Proton Calendar?
Export your data from Proton Calendar (most tools have an export in their settings). Sign up for the alternative; start on its free plan or trial if it has one. Import your export and set up the integrations your team relies on. Run both side by side for a short while, then cancel Proton Calendar.
How to Switch from Proton Calendar
- Export your data from Proton Calendar (most tools have an export in their settings).
- Sign up for the alternative; start on its free plan or trial if it has one.
- Import your export and set up the integrations your team relies on.
- Run both side by side for a short while, then cancel Proton Calendar.
Proton Calendar vs Each Alternative
| # | Tool | Free plan | Paid from | Shared calendars | Calendar sync | Mobile apps | Score |
|---|---|---|---|---|---|---|---|
| 6 | Proton Calendar | Yes | Yes | One_way | Ios and android | 8.8 | |
| 1 | Google Calendar | Yes | $7/user/mo | Yes | Two_way | Ios and android | 9.4 |
| 2 | Microsoft Outlook | Yes | $99.99/user/yr | Yes | One_way | Ios and android | 9.2 |
| 3 | Zoho Calendar | Yes | Yes | Two_way | Ios and android | 9.1 | |
| 4 | Notion Calendar | Yes | Free | Yes | Two_way | Ios and android | 9.0 |
| 5 | Nextcloud Calendar | Yes | €42/user/yr | Yes | Two_way | Ios and android | 8.9 |
| 6 | Doodle | Yes | $11/seat/mo | 8.7 | |||
| 7 | KOrganizer | Yes | Free | Yes | Two_way | 8.6 | |
| 8 | Tuta Calendar | Yes | €3/user/mo | Yes | One_way | Ios and android | 8.5 |
| 9 | Fastmail Calendar | No | Yes | Two_way | Ios and android | 8.4 | |
| 10 | Samsung Calendar | Yes | Yes | Android | 8.3 | ||
| 11 | Lark | Yes | 8.1 | ||||
| 12 | Teamup | Yes | $12/mo | Yes | One_way | Ios and android | 8.0 |
| 13 | Cozi | Yes | $39/yr | Yes | One_way | Ios and android | 7.9 |
| 14 | TimeTree | Yes | $44.99/yr | Yes | One_way | Ios and android | 7.8 |
| 15 | CalendarWiz | No | $144/yr | Yes | One_way | Ios and android | 7.7 |
Head-to-Head
- Proton Calendar vs Google Calendar
- Proton Calendar vs Microsoft Outlook
- Proton Calendar vs Zoho Calendar
- Proton Calendar vs Notion Calendar
- Proton Calendar vs Nextcloud Calendar
- Proton Calendar vs Doodle
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update