Open Sunsama
Open Sunsama: A self-hostable planner for structured daily work, calendars, and AI-assisted workflows. Ranked #17 of 27 in AI Calendar Assistants by our editors (7.6/10); pricing: Open source; best for open-source Sunsama-style planning.
At a glance
- Editor score7.6 / 10
- PricingOpen source
- Best forOpen-source Sunsama-style planning
- Paid fromFree
- Automatic schedulingNo
- Facts checked20 Sep 2026
Where it wins
- Daily kanban planning, time blocking, focus mode, and recurring routines
- Syncs with Google Calendar, Outlook, and iCloud
- Self-hosting, MCP support, and a REST API with scoped keys
Where it doesn't
- Automatic scheduling is not part of its planning model
- For-profit commercial use requires an enterprise license
- AI workflows depend on MCP-compatible assistant tools
Our verdict on Open Sunsama
Open Sunsama is an open-source daily planner and task manager for individuals, managers, engineers, and teams that organize work through daily kanban boards, calendar time blocks, focus sessions, and task rollover. Its task tools include subtasks, notes, attachments, priorities, and estimates, while recurring routines support repeatable planning. Hosted web access is available alongside Windows, macOS, Linux, iOS, and Android applications, with Docker-based self-hosting for teams that want to run the project themselves.
Its ecosystem fit is a central strength. Open Sunsama synchronizes with Google Calendar, Outlook, and iCloud, giving users a multi-calendar planning layer rather than a task list isolated from existing schedules. The MCP connector connects workflows with Claude, ChatGPT, Cursor, Claude Code, and VS Code. A REST API with scoped API keys extends that model to programmatic task and schedule management. These capabilities make it a practical choice for users who want calendar planning alongside configurable developer and AI-assistant workflows.
The product’s main trade-off is focus: it supports priority replanning and natural-language planning input, but its planning model centers on organizing work into time blocks and routines rather than automatic scheduling. Licensing also matters. The custom non-commercial license permits personal, educational, nonprofit, open-source, and evaluation use, while commercial use by for-profit companies requires an enterprise license. Choose Open Sunsama if open-source ownership, self-hosting, broad platform coverage, and structured daily planning are priorities. Choose another tool if automatic scheduling is the defining requirement or if commercial licensing without an enterprise agreement is necessary.
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Open Sunsama pricing
Open Sunsama fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Free |
| Automatic scheduling | No |
| Task management | Yes |
| Priority replanning | Yes |
| Multiple calendars | Yes |
| Planning input | Natural language |
| Supported platforms | Not verified |
| Deployment | Cloud, Self-hosted, Desktop, Mobile |
| Platforms | Web, Windows, macOS, Linux, iOS, Android |
| Support | Docs |
| Built for | Solo, Small business, Mid-market (editorial estimate) |
| Integrations | 8 integrations: Google Calendar, Outlook, iCloud, Claude, ChatGPT, Cursor … |
| Pricing | Open source |
| Website | opensunsama.com |
| Facts checked | 20 Sep 2026 |
Open Sunsama integrations
Open Sunsama lists 8 integrations on its own site.
- Google Calendar
- Outlook
- iCloud
- Claude
- ChatGPT
- Cursor
- Claude Code
- VS Code
Alternatives to Open Sunsama
- MotionA broad AI planner for people who want scheduling, tasks, meetings, and projects together.9.4
- MorgenA broad calendar and task workspace for coordinating schedules across tools.9.2
- FlowSavvyA flexible automatic scheduler with a useful free plan and affordable Pro tier.9.1
See all Open Sunsama alternatives →
Also Ranked In
Open Sunsama is ranked in 3 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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