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Open Sunsama

opensunsama.com

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Spec score 8.8 #18 of 137 in Daily Planner Apps

What it is

Open Sunsama is a task manager and daily planner built around a board of days and calendar time blocking. Move tasks from a backlog to a daily board; unfinished work rolls over to tomorrow. Focus mode times a task and tracks actual time against its estimate. It syncs Google Calendar, Outlook, and iCloud, with support for multiple accounts. Time blocks stay in Open Sunsama rather than being copied to Google or Outlook calendars. Its hosted MCP server connects to Claude, ChatGPT, Cursor, and other MCP clients through OAuth and provides 24 tools. The REST API covers tasks, subtasks, and time blocks, with selectable API-key scopes. Users can also self-host the web app, API, MCP server, and PostgreSQL database using Docker Compose. The free plan costs nothing for personal use. The non-commercial license limits production use by companies, and there is no one-click export button. Desktop apps are available for Mac, Windows, and Linux; phones use the mobile web app, as no native phone app is available yet.

Spec sheet

What it does
Open Sunsama is a daily planner and task manager organized around a kanban board of days, calendar time blocking, and focused work.Read 15 Oct 2026 · opensunsama.com
Product
Open Sunsama is a task manager and daily planner with a board of days and calendar time blocking.Read 7 Oct 2026 · opensunsama.com
Intended users
The maker describes it as a fit for people who want to plan each day with time blocks and let an AI agent help.Read 7 Oct 2026 · opensunsama.com
API
The REST API covers tasks, subtasks and time blocks and uses API keys with selectable scopes.Read 7 Oct 2026 · opensunsama.com
License
The repository uses a custom Open Sunsama Non-Commercial License dated 2024–2026, permitting personal, educational, nonprofit, non-commercial open-source, and evaluation use.Read 15 Oct 2026 · github.com
Maker
The repository identifies Circo as the copyright holder and credits the project as made by Circo.Read 15 Oct 2026 · github.com
AI connector
A hosted MCP endpoint lets Claude, ChatGPT, Cursor, VS Code, Claude Code, and other MCP clients read and modify plans after OAuth authorization.Read 15 Oct 2026 · opensunsama.com
AI integrations
The hosted MCP server supports Claude, ChatGPT, Cursor and other MCP clients through OAuth and provides 24 tools.Read 7 Oct 2026 · opensunsama.com
API scopes
Documented scopes include tasks:read/write, time-blocks:read/write, ideas:read/write, calendar:read, and user:read/write.Read 15 Oct 2026 · npmjs.com
Calendar integrations
The product states that Google Calendar, Outlook, and iCloud calendars synchronize with its timeline.Read 15 Oct 2026 · opensunsama.com
Calendar privacy
Time blocks remain in Open Sunsama and are not copied to Google or Outlook calendars.Read 7 Oct 2026 · opensunsama.com
Calendar sync
YesRead 20 Sep 2026 · opensunsama.com
Commercial restriction
For-profit production use, resale, and commercial products require an enterprise license obtained from Circo.Read 15 Oct 2026 · github.com
Current repository activity
The GitHub repository page shows five open issues and ten open pull requests.Read 15 Oct 2026 · github.com
Daily planning
Tasks can be dragged between day columns, assigned P0 through P3 priorities, given estimates, and broken into subtasks.Read 15 Oct 2026 · opensunsama.com
Data export
Self-hosted data can be copied with pg_dump, while hosted tasks and time blocks can be retrieved through the API; there is no one-click export button yet.Read 7 Oct 2026 · opensunsama.com
Desktop availability
Downloadable desktop applications are offered for macOS, Windows, and Linux.Read 15 Oct 2026 · opensunsama.com
Desktop support
Desktop apps are available for Mac, Windows and Linux and connect to the hosted service.Read 7 Oct 2026 · opensunsama.com
Developer stack
The repository describes React/Vite web code, Hono and Drizzle on the API, PostgreSQL, Tauri desktop wrappers, and Expo React Native mobile code.Read 15 Oct 2026 · mdskills.ai
Documentation depth
Public documentation includes quick-start instructions, API and MCP guidance, calendar setup, Docker deployment, backups, updates, and keyboard shortcuts.Read 15 Oct 2026 · opensunsama.com
External MCP assessment
mdskills.ai rates the Open Sunsama MCP server 7.3 as an intermediate, verified skill and says it has extensive API documentation but limited installation and troubleshooting guidance.Read 15 Oct 2026 · mdskills.ai
External MCP permissions
The mdskills.ai listing says the MCP skill requests filesystem read/write, shell execution, network access, and Git write permissions.Read 15 Oct 2026 · mdskills.ai
Focus mode
Focus mode displays one task with a timer and records actual time against the estimate.Read 15 Oct 2026 · opensunsama.com
Focus sessions
YesRead 20 Sep 2026 · opensunsama.com
Ideas boards
Someday ideas can be kept on separate Trello-style boards and promoted into tasks.Read 15 Oct 2026 · opensunsama.com
License limit
The non-commercial license allows personal use, education, nonprofit groups, non-commercial open-source projects, evaluation and testing; companies need a commercial license for production use.Read 7 Oct 2026 · opensunsama.com
Maker contact
Commercial licensing is directed to [email protected].Read 15 Oct 2026 · github.com
MCP scope
The project documents 24 MCP tools covering tasks, time blocks, subtasks, profile operations, and calendar access.Read 15 Oct 2026 · mdskills.ai
Mobile availability
The official site says there is no native phone app in app stores; phone use is through the browser as a mobile web app.Read 15 Oct 2026 · opensunsama.com
Mobile platforms
bothRead 20 Sep 2026 · opensunsama.com
Mobile support
Open Sunsama works in a phone browser as a mobile web app, and the site says there is no native phone app yet.Read 7 Oct 2026 · opensunsama.com
Open issue: authentication
An open issue requests two-factor authentication and passkeys, indicating those controls were not yet available as requested.Read 15 Oct 2026 · github.com
Open issue: iCloud selection
An open issue requests the ability to select specific iCloud calendars for synchronization.Read 15 Oct 2026 · github.com
Open issue: Office calendar
An open issue reports that attempting to connect an Office 365 calendar can stop before completion and prevent returning to the Open Sunsama window.Read 15 Oct 2026 · github.com
Open-source qualification
The product page itself explains that the non-commercial restriction means the project is not open source under the strictest definition.Read 15 Oct 2026 · opensunsama.com
Planning method
time blockingRead 20 Sep 2026 · opensunsama.com
Recurring tasks
YesRead 20 Sep 2026 · opensunsama.com
Release packaging
The GitHub Releases page currently says there are no published releases.Read 15 Oct 2026 · github.com
REST API
A public REST API accepts JWT or scoped API-key authentication for tasks, time blocks, ideas, and user data.Read 15 Oct 2026 · github.com
Rollover and recurring work
Unfinished tasks roll to the next day and recurring tasks can be brought back automatically.Read 15 Oct 2026 · opensunsama.com
Search and shortcuts
A command palette opened with Cmd/Ctrl+K searches tasks, ideas, and events, while keyboard shortcuts cover common actions.Read 15 Oct 2026 · opensunsama.com
Security policy
The repository supports security patches for version 1.x and asks vulnerability reporters to email [email protected].Read 15 Oct 2026 · github.com
Self-host requirements
The self-hosting guide specifies Docker 20.10+, Compose 2.24+, and at least 2 GB RAM.Read 15 Oct 2026 · opensunsama.com
Self-hosting
Docker Compose can run the web app, API, MCP server, PostgreSQL, and Redis on a user's own server.Read 15 Oct 2026 · opensunsama.com
Time blocking
Dragging a task onto the calendar creates a linked time block that can be resized to show the planned duration.Read 15 Oct 2026 · opensunsama.com

Plans and prices

Free Free free forever; no premium tier or subscription all features · time blocking · calendar sync · focus mode · desktop apps · self-hosting Read 15 Oct 2026 · opensunsama.com
Personal use / hosted app or self-hosted Free Free for personal use · For-profit production use and commercial resale require a commercial license · No one-click export button yet Read 7 Oct 2026 · opensunsama.com

Every Open Sunsama plan and price →

Strong points and limits

Strong points

  • Daily board carries unfinished tasks into tomorrow.
  • Focus timer compares actual time with task estimates.
  • Syncs Google Calendar, Outlook, and iCloud.
  • Self-hosting includes the app, API, MCP server, and database.

Limits

  • No native phone app yet.
  • No one-click export button yet.
  • Companies need a commercial license for production use.

Who it suits

It suits people who plan each day with time blocks and want an AI agent to help. It may also suit users who want to self-host, provided their use falls within the non-commercial license.

Open Sunsama in depth

Read the full write-up

Open Sunsama is a daily planner that pairs a task board with calendar time blocking. It suits people who prefer to shape their own day and want the option of connecting an AI agent or running the service themselves. Its free personal-use access is a strong draw, but manual scheduling, commercial-license limits, and browser-only phone access narrow the fit.

Overview

Planning starts with a backlog: move tasks onto a board for the day, then arrange them around calendar commitments. Unfinished tasks roll over to tomorrow, while recurring tasks and priority replanning help keep ongoing work in view. Natural-language planning input adds another way to describe tasks, but Open Sunsama does not automatically place them on the calendar. It is for people who want control over the plan, not those looking to delegate scheduling.

Calendar sync covers Google Calendar, Outlook, and iCloud, including multiple accounts. Time blocks stay inside Open Sunsama rather than being copied to Google or Outlook calendars. That separation may suit people who want calendar context without filling their external calendars with planner blocks.

Key features

Time blocking and focus

Focus mode times work and tracks actual time against a task estimate. That gives users a way to compare planned and spent time during the day, though it does not adjust the schedule automatically. Time blocking is useful for deliberate daily planning; readers who want automatic rescheduling should look elsewhere.

AI connections, API, and self-hosting

The hosted MCP server connects through OAuth to Claude, ChatGPT, Cursor, and other MCP clients, with 24 tools. The REST API covers tasks, subtasks, and time blocks, with API keys that have selectable scopes. These integrations make Open Sunsama more adaptable for users who want an AI agent or custom software to work with their planning data.

Self-hosting runs the web app, REST API, MCP server, and PostgreSQL database through Docker Compose on the user's server. It requires Docker 20.10 or newer, Compose 2.24 or newer, and 2 GB of RAM. That is meaningful control for technically equipped users, but an extra operational commitment for anyone who simply wants a hosted planner.

Pricing

The Personal use / hosted app or self-hosted plan costs free. It is free for personal use, including hosted access or self-hosting. Education, nonprofit groups, non-commercial open-source projects, evaluation, and testing are also allowed under the non-commercial license. Companies need a commercial license for production use, and commercial resale also requires one. This is not a general-purpose free business tier.

The free plan does not include a one-click export button. Self-hosted users can copy data with pg_dump, while hosted tasks and time blocks can be retrieved through the API; users who need a simple export workflow should account for that limitation.

Platforms

Open Sunsama supports web, Android, iOS, Mac, Windows, and Linux, as well as API access and self-hosting. Desktop apps for Mac, Windows, and Linux connect to the hosted service. On phones it works in a browser as a mobile web app; there is no native phone app yet. That is workable for browser-based access, but less suitable for users who require a dedicated mobile app.

Who it's for

Choose Open Sunsama if you want to arrange tasks into daily time blocks, keep multiple calendar accounts in view, and carry unfinished work forward. It is especially relevant to personal users interested in AI-agent connections or self-hosting. It is a weaker fit for companies needing production use without a commercial license, people who expect automatic scheduling, or anyone who wants a native phone app or one-click export.

Pros and cons

Pro: Free personal access covers both the hosted app and self-hosting, with a clear distinction between permitted non-commercial use and commercial production.

Pro: Google Calendar, Outlook, and iCloud sync with multiple accounts, while planner time blocks remain inside Open Sunsama.

Pro: A hosted MCP server, scoped API keys, and a self-hostable stack give technically inclined users several ways to connect or control the service.

Con: Scheduling is manual; focus timing measures work against estimates but does not automatically build or revise the plan.

Con: Phone access is through a browser rather than a native app.

Con: Export requires pg_dump for self-hosted data or API retrieval for hosted tasks and time blocks; there is no one-click button.

Con: For-profit production use and commercial resale require a commercial license, limiting the free plan for business use.

Alternatives

For another planner with a free tier, Routine has a Free plan at free, capped at 3 integrations, 3 custom databases, and 250 AI credits. Consider it if those allowances suit your workflow; Open Sunsama instead offers calendar time blocking and self-hosting under its personal-use plan.

Amie is a freemium option with a free plan and a monthly Pro billing option. Its listed platforms are iOS, Mac, and Windows, so it may suit someone seeking an alternative on those systems.

FlowSavvy has a Basic plan with one scheduling-hours profile, three repeating auto-scheduled tasks, five task lists, and a two-week auto-scheduling range. Choose it if automated scheduling is the priority; Open Sunsama requires users to place tasks themselves.

SkedPal is a paid alternative with a Core plan at $9.95 a month, billed annually, including a 21-day AI scheduling window and calendar sync for one account. It is a better match for readers who want AI scheduling and accept a paid plan.

Sunsama is a paid alternative with a Pro plan at $17 a year, billed yearly, including unlimited usage, unlimited integrations, and AI, MCP, and Zapier. Consider it if those plan terms and integrations matter more than Open Sunsama's free personal-use access and self-hosting.

General Bots Calendar is a free, self-hosted calendar option with unlimited users and operations and AGPLv3 source. It may suit readers prioritizing those terms over Open Sunsama's daily task board and time-block planning.

Reclaim AI has a free Lite plan for one user, with a one-week scheduling range, one calendar sync, one scheduling link, and five AI agents. Choose it if those scheduling allowances fit better than Open Sunsama's manually arranged daily plan.

DayWise is an Android freemium alternative with a free plan for manual scheduling and core task management. It is another option for mobile task planning.

Browse AI Calendar Assistants, Time Blocking Apps, and Daily Planner Apps for more options in those categories.

Verdict

Open Sunsama is a good choice for personal users who want a free, self-hostable daily planner with calendar sync, time blocking, and AI-agent connections. Its strongest reason to choose it is the combination of those capabilities with personal-use access at no charge. Look elsewhere if you need automatic scheduling, native phone access, simple one-click export, or free commercial production use.

Verdict

Open Sunsama combines daily time-block planning with calendar sync, task timing, APIs, and self-hosting. Check the license terms, phone access, and export options against your needs before choosing it.

Where Specifiction places it

Alternatives to Open SunsamaAll alternatives →