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Open Planner Studio
Dordrecht, Netherlands
What it is
Open Planner Studio is a free, open-source construction planning tool for buildings, infrastructure, and civil works. It provides Gantt charts, automatic critical-path calculation, resource histograms, and levelling when resources are overallocated. Schedules use native IFC 4.3 and can import or export IFC, CSV, MS Project XML, and Primavera P6 XML; MS Project MPP files can be opened natively. Construction calendars can include holidays, recesses, frost delays, inspections, and phasing, with task durations entered in days or hours. Reports export as PDFs at approximately 220 DPI, on paper sizes up to A2, with baseline overlays and status or progress lines. A built-in MCP server lets compatible AI clients such as Claude Code read and edit schedules, with pause, read-only mode, automatic backups, and an activity panel. Schedules are stored as IFC files rather than a proprietary closed format. Crash recovery and optional periodic saving are included. An offline manual is available in fourteen languages. The product is marked Available Beta and runs on Linux, macOS, Windows, and the web; no mobile apps are listed.
For and against
For
- Free and open source
- Gantt charts and critical-path analysis
- Imports and exports several schedule formats
- Built-in MCP server for compatible AI clients
- Offline manual in fourteen languages
Against
- Marked Available Beta
- No mobile apps listed
- PDF export is approximately 220 DPI
- AI editing requires a compatible client
The verdict
Open Planner Studio combines construction scheduling, IFC interoperability, resource planning, and optional AI-assisted editing without subscription or per-seat fees. Its beta status and lack of mobile apps are the main limitations to weigh.
Who it suits
It suits work planners, schedulers, project leads, and BIM coordinators handling construction schedules. Teams wanting open IFC-based files, desktop or browser access, and AI-assisted editing may find it relevant.
Plans and prices
Free and open source
Gantt charts · Critical-path analysis · Resource planning and levelling · IFC 4.3 schedules
Read 22 Sep 2026 · open-aec.com
Open Planner Studio
Free and open source under LGPL-3.0 · no subscription · no per-seat licence fees
Read 29 Sep 2026 · open-aec.com
On the record
- AI integration
- A built-in MCP server lets compatible AI clients such as Claude Code read and edit schedules, with pause, read-only mode, automatic backups and an activity panel.open-aec.com · read 29 Sep 2026
- Availability
- The product is marked Available Beta in the OpenAEC ecosystem.open-aec.com · read 29 Sep 2026
- Construction planning
- Users can configure construction calendars with holidays, recesses, frost delays, inspection moments and phasing, and set task durations in days or hours.open-aec.com · read 29 Sep 2026
- Data handling
- The product page says schedules are stored as IFC files, an open buildingSMART standard, rather than in a proprietary closed format.open-aec.com · read 29 Sep 2026
- File formats
- Schedules use native IFC 4.3 and the app imports and exports IFC, CSV, MS Project XML and Primavera P6 XML, as well as opening MS Project MPP files natively.open-aec.com · read 29 Sep 2026
- Intended users
- The maker invites work planners, schedulers, project leads and BIM coordinators to test the product and provide feedback.open-aec.com · read 29 Sep 2026
- Maker structure
- OpenAEC describes a Foundation that maintains tools, OpenAEC Studio that provides implementation, hosting, custom development and professional support, and a community of contributors.open-aec.com · read 29 Sep 2026
- Purpose
- Open Planner Studio is an open source construction planning tool for buildings, infrastructure and civil works.open-aec.com · read 29 Sep 2026
- Reporting
- Reports support PDF export at approximately 220 DPI, paper sizes up to A2, baseline overlays and status or progress lines.open-aec.com · read 29 Sep 2026
- Saving and recovery
- The app offers crash recovery, and optional periodic saving back to a writable project file; unsaved documents are not automatically overwritten.open-aec.com · read 29 Sep 2026
- Scheduling
- It provides Gantt charts, automatic critical path calculation, resource histograms and automatic levelling of overallocation.open-aec.com · read 29 Sep 2026
- Support
- The app includes an offline manual in fourteen languages, with a quick start, practical guides, reference pages and sample projects.open-aec.com · read 29 Sep 2026
