Best Google Calendar Alternatives in 2026

4 private alternatives, vetted against our public criteria.

Your schedule says everything about you. These calendars encrypt it.

Select the "Mail Plus" or "Proton Unlimited" paid plans for more features.

Audited Encrypted Android Bitcoin

Tutanota: Free, Cross-Platform and Zero-Knowledge Calendar

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Audited by Cure53 in May 2019.

Audited Encrypted Bitcoin

If you decide to self-host EteSync you won't have to pay for the subscription. Tutorial here .

Encrypted Paid Plan Bitcoin Android iOS Hosted Self-Hosted