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ProjectLibre

ProjectLibre is the leading open-source desktop alternative to Microsoft Project, running locally on Windows, macOS, and Linux. It covers Gantt charts, network diagrams, WBS/RBS charts, resource allocation, task dependencies, critical-path tracking, and earned-value costing, and can read and write Microsoft Project (.mpp) files. Founded by Marc O'Brien and Laurent Chretienneau, it is released under the Common Public Attribution License (CPAL) and has been downloaded millions of times worldwide.

3.6/5desktop-ganttFree (open-source desktop app, CPAL)

Our verdict

Last verified Jun 15, 2026

The de facto open-source MS Project desktop alternative: strong scheduling/EVM features, .mpp compatibility, and millions of downloads across 190+ countries, with full local data control. Held back because it is a single-user desktop app (not a self-hosted multi-user server) with a dated Java interface and slow release cadence (v1.9.8, April 2025).

Rating
3.6/5
Editorial score
Users
0
Verified users
Starting at
Free (open-source desktop app, CPAL)
open-source free desktop; ProjectLibre Cloud/Enterprise quoted separately
Category
desktop-gantt
Market segment

Key Features

Gantt charts and critical-path scheduling
Network diagrams and WBS/RBS charts
Resource allocation and histograms
Task dependencies and constraints
Earned-value cost management
Reads/writes Microsoft Project (.mpp) files
Runs on Windows, macOS, and Linux

Pros & cons

Pros

  • Closest open-source equivalent to Microsoft Project's desktop UI
  • Reads and writes .mpp files for easy migration
  • Strong scheduling, resource, and earned-value features
  • Free, cross-platform, and fully local (no cloud required)

Cons

  • Desktop, single-user app — not a self-hosted multi-user server
  • Aging Java-based interface
  • Team/cloud collaboration features are a separate quote-based product

Detailed Information

No information available for Inventory Tracking Methods.

Best For

Individual project managers needing an MS Project desktop replacementTeams that exchange .mpp files and want full local data controlGovernment, non-profit, and small-agency planners on a budget

Not ideal for

Teams needing real-time, multi-user collaboration on a serverAgile teams wanting boards, sprints, and issue tracking

Integrations

Microsoft Project (.mpp import/export)
Microsoft Excel / CSV export

Frequently Asked Questions

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0 verified users

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Additional Information

Category
desktop-gantt
Price Range
Free (desktop); Cloud/Enterprise quoted
Pricing Model
open-source free desktop; ProjectLibre Cloud/Enterprise quoted separately

Company

Founded
2012
Headquarters
San Mateo, California, USA