Musubi
Musubi is a shared calendar that brings calendars, tasks, and people together for everyday planning.
What Musubi is
Musubi is a shared calendar that brings calendars, tasks, and people together for everyday planning. Events can appear in multiple calendars, with changes reflected across those appearances. It connects to Google Calendar, Apple iCloud, Outlook, Microsoft 365, and compatible CalDAV services such as Nextcloud, Fastmail, and Radicale. Synchronization works both ways when the provider and permissions allow; read-only calendars remain read-only. Users can view schedules by day, week, month, or agenda, and tasks include status, priority, and due dates, with list and Kanban views on the web. Musubi has Android and iOS apps, shared tasks, and reminders; Android also offers agenda and month widgets. It is open source under the MIT License and can be self-hosted. The hosted app and primary database run in Germany, but Musubi says it is not end-to-end encrypted because the server must read event data for sharing and cross-provider sync. Hosted Musubi is free during early access, and the product may change or have bugs.
Good
- Free hosted access during early access.
- Connects to major calendar providers and compatible CalDAV services.
- Offers shared tasks, reminders, and multiple calendar views.
- Open source under the MIT License; self-hosting is available.
- Android and iOS apps are available.
Watch out
- Not end-to-end encrypted.
- Early-access features may change and bugs may occur.
- Self-hosting requires Docker Compose v2, a domain, and HTTPS.
- Read-only calendars remain read-only.
Who it suits
Musubi suits people who want to coordinate calendars and tasks across providers, devices, or shared schedules. It may also suit users comfortable self-hosting or using an early-access product.
Verdict
Musubi brings shared calendars and tasks together, with provider connections and self-hosting options. Its lack of end-to-end encryption and early-access status are important considerations.
Plans and prices
From Musubi's own pricing page, checked 8 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Hosted Musubi (early access) | Free | Free during early access |
The facts
Each one read from Musubi's own pages, with the date it was checked.
What it does
- Calendar sync
- two_waychecked 22 Sep 2026
- Calendar views
- The product offers day, week, month, and agenda views, with personal pages for choosing which calendars and items to show.checked 8 Oct 2026
- Early access
- Musubi is still evolving, and the maker says features may change and users may encounter bugs.checked 8 Oct 2026
- Integrations
- Musubi connects to Google Calendar, Apple iCloud, Outlook and Microsoft 365, and compatible CalDAV services such as Nextcloud, Fastmail, and Radicale.checked 8 Oct 2026
- Linked events
- An event can appear in multiple calendars and be updated once wherever it appears.checked 8 Oct 2026
- Mobile features
- The Android app offers agenda and month widgets, and event reminders are scheduled on the device.checked 8 Oct 2026
- Open source
- Musubi is open source under the MIT License and can be self-hosted.checked 8 Oct 2026
- Privacy
- Musubi says it does not sell calendar data or use connected calendar and task data for advertising or AI training.checked 8 Oct 2026
- Purpose
- Musubi is a shared calendar for everyday life that brings calendars, tasks, and people together.checked 8 Oct 2026
- Security
- The hosted app and primary database run in Germany, connections use HTTPS/TLS, and certain provider credentials receive application-level authenticated encryption.checked 8 Oct 2026
- 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.checked 8 Oct 2026
- Self-hosting requirements
- Self-hosting uses Docker Compose v2, a domain, and HTTPS; the stack includes the web app, API, Postgres, and Caddy gateway.checked 8 Oct 2026
- Shared calendars
- Users can invite selected people to a shared calendar and grant view or edit access.checked 8 Oct 2026
- Support
- The maker says product questions and support requests can be sent by email, and it also provides feedback and community links.checked 8 Oct 2026
- Sync limits
- Changes sync both ways where the provider and permissions allow, while read-only calendars remain read-only.checked 8 Oct 2026
- Tasks
- Tasks can be tracked alongside events, with status, priority, due dates, and list or Kanban views on the web.checked 8 Oct 2026
Money
- Free plan
- Yeschecked 22 Sep 2026
The company
- Headquarters
- Brno, Czech Republicchecked 28 Sep 2026
Where it runs
- Mobile apps
- ios and androidchecked 22 Sep 2026
- Platforms
- The desktop web app and Android app are available; iOS is in beta through TestFlight.checked 8 Oct 2026
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