Musubi

Web · Android · iPhone · Self-hosted

Freedom report

Three barsScore 7.8

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely3 of 6 device platforms
DocumentedPlans, terms and facts published

Musubi is ranked #16 of 197 in calendar apps on Freedom251, made by Musubi (Brno, Czech Republic). It runs on Android, iOS, Self-hosted, Web. There is a free plan.

Musubi plans and pricing

All plans

Hosted Musubi (early access) Free Free during early access musubi.pro · 8 Oct 2026

Compared on calendar apps

Free plan: Yes
Shared calendars: Yes
Calendar sync: two_way
Mobile apps: ios and android

Best Musubi alternatives

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Three bars Mozilla Thunderbird Free tierOpen source No. 1Free9.0 Two bars Microsoft Outlook Calendar Free tier No. 2$1.67/mo8.2 Two bars Lark Free tier No. 3Free8.2 Two bars EGroupware Open source No. 4€21.90/mo8.2 One bar Proton Calendar Free tier No. 5Free8.0 Two bars Teamup Free tier No. 6$12/mo8.0

The record

Purpose: Musubi is a shared calendar for everyday life that brings calendars, tasks, and people together.
Linked events: An event can appear in multiple calendars and be updated once wherever it appears.
Tasks: Tasks can be tracked alongside events, with status, priority, due dates, and list or Kanban views on the web.
Calendar views: The product offers day, week, month, and agenda views, with personal pages for choosing which calendars and items to show.
Integrations: Musubi connects to Google Calendar, Apple iCloud, Outlook and Microsoft 365, and compatible CalDAV services such as Nextcloud, Fastmail, and Radicale.
Sync limits: Changes sync both ways where the provider and permissions allow, while read-only calendars remain read-only.
Mobile features: The Android app offers agenda and month widgets, and event reminders are scheduled on the device.
Platforms: The desktop web app and Android app are available; iOS is in beta through TestFlight.
Open source: Musubi is open source under the MIT License and can be self-hosted.
Self-hosting requirements: Self-hosting uses Docker Compose v2, a domain, and HTTPS; the stack includes the web app, API, Postgres, and Caddy gateway.
Security: The hosted app and primary database run in Germany, connections use HTTPS/TLS, and certain provider credentials receive application-level authenticated encryption.
Security limitation: Musubi states that it is not end-to-end encrypted because shared calendars and cross-provider sync require the server to read event data.
Privacy: Musubi says it does not sell calendar data or use connected calendar and task data for advertising or AI training.
Support: The maker says product questions and support requests can be sent by email, and it also provides feedback and community links.
Price from: Free

Where it ranks on Freedom251

Best Calendar Apps in 2026#16 of 197
Best Family Calendar Apps in 2026#10 of 43

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Sources

musubi.pro· checked 8 Oct 2026
musubi.pro/features· checked 8 Oct 2026
musubi.pro/self-host· checked 8 Oct 2026
musubi.pro/privacy· checked 8 Oct 2026
musubi.pro/about· checked 8 Oct 2026