Open Planner Studio

Open Planner Studio is ranked #6 of 47 in gantt chart software on The Geeks Club. It runs on Linux, macOS, Web, Windows. There is a free plan.

Open Planner Studio plans and pricing

All plans

Free and open source Free Nothing; no subscription and no per-seat licence fees. Gantt charts · Critical-path analysis · Resource planning and levelling · IFC 4.3 schedules · Desktop and browser use open-aec.com · 22 Sept 2026

Open Planner Studio Free Free and open source under LGPL-3.0 · no subscription · no per-seat licence fees open-aec.com · 29 Sept 2026

Compared on gantt chart software

Free plan: Yes
Critical path: Yes
Gantt charts: Yes
Resource planning: Yes
Mobile apps: none

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Open Planner Studio

Purpose: Open Planner Studio is an open source construction planning tool for buildings, infrastructure and civil works.
Scheduling: It provides Gantt charts, automatic critical path calculation, resource histograms and automatic levelling of overallocation.
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.
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.
Platforms: The app runs in a browser and has desktop builds for Windows, macOS and Linux.
Construction planning: Users can configure construction calendars with holidays, recesses, frost delays, inspection moments and phasing, and set task durations in days or hours.
Reporting: Reports support PDF export at approximately 220 DPI, paper sizes up to A2, baseline overlays and status or progress lines.
Data handling: The product page says schedules are stored as IFC files, an open buildingSMART standard, rather than in a proprietary closed format.
Saving and recovery: The app offers crash recovery, and optional periodic saving back to a writable project file; unsaved documents are not automatically overwritten.
Support: The app includes an offline manual in fourteen languages, with a quick start, practical guides, reference pages and sample projects.
Availability: The product is marked Available Beta in the OpenAEC ecosystem.
Intended users: The maker invites work planners, schedulers, project leads and BIM coordinators to test the product and provide feedback.
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.
Headquarters: Dordrecht, Netherlands
Price from: Free

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Where it ranks on The Geeks Club

Best Gantt Chart Software in 2026#6 of 47
Best Construction Scheduling Software in 2026#4 of 28

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Sources

open-aec.com/en/open-planner-studio/· checked 29 Sept 2026
open-aec.com/en/· checked 29 Sept 2026
open-aec.com/en/structuur/· checked 29 Sept 2026