Free Microsoft Project Alternatives (2026): The Honest List

The genuinely free Microsoft Project alternatives in 2026 are Onplana Free (cloud, 2 projects, dependencies, Gantt with critical path, and .mpp import), ProjectLibre and GanttProject (open-source desktop), OpenProject Community (self-hosted server), and Microsoft Planner Free (basic task tracking only). Each one runs out in a different place, and that is the part most lists skip. Here is the pattern that repeats across every free Microsoft Project alternative evaluation. A team finds a free project management tool, migrates two months of project history into it, trains the team on the interface, and builds report templates. Six months in, they hit the one feature they actually need: more than a couple of active projects, a dependency type other than finish-to-start, or a resource utilization view that goes beyond a single sheet. That feature is locked behind a paid tier that costs more than they expected.

The frustration is not that paid tiers exist. It is that "free" is used to describe everything from "free forever with real features" to "free trial for 14 days" to "free as in you can read the brochure without signing up." The differences are material, and they are almost never explained in the comparison articles that dominate Google's results for this query.

This post breaks down five tools that legitimately qualify as free Microsoft Project alternatives, explains exactly what each free tier includes and where it stops, and tells you which one fits which situation. The goal is to help you pick the right tool before you commit months of project data to it.

Head-to-head comparison: see the head-to-head Onplana vs Plane comparison for a direct feature-by-feature breakdown.

Onplana positioning: the comprehensive why Onplana covers this topic end-to-end; this post zooms in on one aspect.

TL;DR. For cloud-based free with AI, all four dependency types, .mpp import, and a Gantt with critical path: Onplana Free (2 projects, no credit card). For unlimited offline desktop use with .mpp compatibility: ProjectLibre (open-source). For free open-source server deployment with no user limits: OpenProject Community (self-hosted, requires server). For staying inside Microsoft 365: Planner Free (limited scheduling). For a native Gantt desktop app: GanttProject (open-source). None of these is free Microsoft Project at scale, and this post explains exactly where each one runs out.

Microsoft Project Replacement: What Actually Has to Carry Over

Replacing Microsoft Project is not really a feature comparison. It is a question of what survives the export: a .mpp file carries your tasks, dates, durations and dependencies into almost any tool on this list, and leaves your custom fields, your working calendars and your baselines behind.

That last one deserves a number. When we audited 500 real project schedules in April 2026, only 27% had a baseline set at all, and 41% of those were more than 90 days old. For most teams the thing that does not survive the move was already missing before they started, and the migration is simply when they find out.

What comes across. Task names and the outline structure, durations, start and finish dates, predecessors with their type and lag, constraints, percent complete, resource names and milestones. That is the schedule as a schedule. How much of it a given tool actually reads varies widely across this list, and it is the first thing to check rather than the last.

What does not, in roughly the order teams hit it:

Enterprise custom fields, lookup tables and calculated fields. The export covers the headline data; the metadata your reports are built on does not travel with it, so dashboards arrive looking right and reading wrong. Which ones transfer, which need mapping and which you rebuild is covered field by field.

Calendars, which run three layers deep: enterprise, project-specific and resource. Miss one layer and the schedule math breaks quietly, with a task that should start the Monday after a bank holiday opening on the Friday before it instead and nobody able to say why. All three layers, and how to check each one.

Baselines and resource calendars, which most tools treat as optional and most PMOs discover are not.

Where the free options separate. Reading a .mpp at all is the first filter, and it is a real one. Onplana Schedule opens .mpp and MSPDI .xml files on Windows and Mac, free, with no Microsoft Project licence, and saves back to MSPDI XML that Project itself reads. It draws baseline bars when the file carries them, which is how you find out whether yours does. One detail stated in full rather than glossed, and it turns on the contents of the file rather than its extension: if the contents are Microsoft Project XML, Onplana Schedule reads them on your own machine and nothing is uploaded. Everything else, a binary .mpp and a Primavera P6 or Planner XML export alike, is converted on Onplana's servers and the uploaded copy is deleted within 24 hours. If you only need to read the file once, you can open it without installing anything.

What the switch actually costs. The schedule itself imports in one pass. Rebuilding what did not come with it, the fields, the calendars and the baselines, is the long part, and it is worth sequencing on purpose instead of discovering in order. A 90-day plan for exactly that.

What "Free Forever" Actually Means

Free tools fall into three categories, and conflating them is how teams end up committing to the wrong one.

Free tier of a commercial SaaS product. The product exists primarily as a paid service. The free tier is a real product with real limits designed to convert users to paid plans. Onplana Free and Microsoft Planner Free fall here. You get a working product with genuine features, but you will eventually need paid tiers for larger usage. The trade-off: you get maintained cloud infrastructure, zero hosting cost, and ongoing product development. You give up: control over when features change or disappear, data portability if the company pivots pricing, and the ability to self-host for compliance reasons.

Open-source desktop or server software. The product is developed under an open-source license. You install it yourself, own your data, and pay nothing for the license indefinitely. GanttProject, ProjectLibre, and OpenProject Community fall here. The trade-off: you bear the installation and maintenance cost (hosting for server tools, compatibility issues for desktop tools), and open-source tools usually lag commercial products on polish, mobile access, and integrations.

Freemium tools with severe limits. Some tools label themselves free but provide so few features in the free tier that the label is misleading. These are not covered here because they do not genuinely substitute for Microsoft Project at any realistic usage level.

The five tools below all pass a basic test: a team could use them for real project work, at no cost, indefinitely, within their stated limits.

Onplana Free: All Four Dependency Types, .mpp Import, and AI

Onplana's free tier is the strongest cloud-based option here for getting real Microsoft Project data into a browser. Here is what is included: 2 active projects, up to 5 members, 300 MB storage, unlimited tasks per project, all four dependency types (FS/SS/FF/SF with lag), milestones, Kanban and calendar views, native .mpp, MSPDI XML, Primavera .xer and Excel import, AI chat (a one-time 100,000-token-per-seat bonus), and no time limit. No credit card required to sign up.

One thing to be clear about, because it is the reason many readers land on this page: the Gantt timeline and critical path are on the free tier. Every Onplana plan, Free included, carries the Gantt chart with critical path and baseline overlay. Your dependency logic is fully preserved on Free, and an imported .mpp keeps its FS/SS/FF/SF links and lag values, so you work that schedule on the Gantt as well as in list, board, and calendar views. If a free visual Gantt is the hard requirement, Onplana Free meets it in the browser, and GanttProject or ProjectLibre meet it on the desktop.

What the free tier does not include: project templates (Starter), more than 2 projects (Starter at $7/user/month raises the cap to 25), enterprise resource pool and utilization heatmap (Pro), AI plan generation and AI status reports (Pro), advanced governance pipeline (Business), and self-hosted deployment (paid).

For teams that are moving off Microsoft Project Professional or Project Online and want to evaluate a modern Microsoft Project alternative before committing, the free tier provides enough room to run a real pilot. Import a few .mpp files, validate that dependency types and schedule logic survive the import, and run the free Migration Preview tool to see exactly what migrates before touching production data.

The two-project cap is the constraint to plan around, and it is tight enough to be honest about. A solo PM tracking one live project alongside a personal one, a startup managing a single product roadmap, or a team running a genuine pilot before migrating off Project Online all fit inside it with no paid upgrade. A consulting firm juggling three or four client engagements at once does not, and neither does a PMO with a portfolio. Those cases need Starter at $7 per user per month, which raises the cap to 25 projects.

GanttProject: Open-Source Desktop Gantt

GanttProject is a free, open-source (GPL3) desktop application that has been developed since 2003 and remains actively maintained, with the v3.3 release in January 2025 and a beta v3.4 release in February 2026.

GanttProject does what it says: it creates Gantt charts with task dependencies, resource assignments, and milestones. It generates PDF and PNG exports. It has basic resource load charts. It runs on Windows, macOS, and Linux.

Limitations that matter for teams moving off Microsoft Project: GanttProject supports finish-to-start dependencies only. It does not support SS, FF, or SF relationship types, so any schedule that uses those relationships will lose them on import. Its .mpp import is limited and unreliable for complex schedules. There is no cloud sync, no mobile app, no collaboration, and no web-based access: it is a file-based desktop tool.

GanttProject is the right free tool for: solo project managers or small teams that want a Gantt chart application on their desktop at no cost, do not need cloud collaboration, and are not migrating a complex Project Online schedule. It is not a replacement for Microsoft Project's scheduling engine; it is a free Gantt drawing tool with basic scheduling capability.

ProjectLibre: The Closest Open-Source Match for MS Project Users

ProjectLibre is the most direct open-source equivalent to Microsoft Project's desktop interface. It is free (CPAL license), open-source, and runs on Windows, macOS, and Linux. The current version (1.9.8 as of April 2025) has roughly 13,000 downloads per week on Sourceforge.

ProjectLibre opens .mpp files from Microsoft Project, supports FS/SS/FF/SF dependency types with lag values, calculates the critical path, handles resource pools and cost tracking, and presents a UI that Microsoft Project users will recognize. For a team whose primary need is "keep working on our existing .mpp files without paying a Microsoft license," ProjectLibre is the most direct open-source answer, and of the two desktop options here it is the only one that runs on Linux and ships its source under an open licence.

Onplana Schedule reaches the same place from a different direction: free, Windows and Mac, it opens .mpp without a Microsoft licence, shows the critical path and float, and saves edits back as Project XML that Microsoft Project reads. It is our own app and it is not open source, so where that is the requirement ProjectLibre is the answer and this is not. If the need is narrower still, just opening a single file someone sent you rather than adopting a desktop tool at all, see how to open an .mpp file without Microsoft Project, which covers the browser route alongside both desktop apps.

The trade-offs: ProjectLibre is a desktop application with no cloud sync, no mobile access, and no collaboration features. Schedules live in local files. If two PMs need to update the same project, they work sequentially and merge manually. The UI has not changed significantly in years and it shows: it is functional but not modern. There is no AI, no automated risk detection, and no executive dashboard.

ProjectLibre is the right free tool for: individual PMs who need to keep working with .mpp file formats at no cost, teams with a single PM per project who do not need cloud collaboration, and organizations that need an air-gapped scheduling tool for compliance reasons.

OpenProject Community: Free Self-Hosted Project Management

OpenProject Community edition is the free, open-source (GPL3) version of OpenProject, a full-featured web-based project management platform. It is free to self-host with no per-seat cost and no project or user limit.

OpenProject Community supports Gantt charts, task dependencies (FS, SS, FF, SF), work packages, boards, sprints, and basic reporting. It has a genuinely full feature set for a free tool. The community edition is a real server application, not a demo.

The trade-offs: you have to run a server. OpenProject's installation is not trivial: it uses a Debian/Ubuntu package or Docker, requires a server with adequate RAM (recommended 4+ GB), and needs ongoing maintenance for updates and security patches. For organizations without internal IT capacity to run a server, the "free" label understates the real cost. Cloud-hosted OpenProject starts at around 6 euros per user per month (annual billing, 25-user minimum).

OpenProject also has limited .mpp import capability: it can import some .mpp data but the fidelity is not as high as Onplana's native import or ProjectLibre's direct file compatibility.

OpenProject Community is the right free tool for: organizations with IT infrastructure and the technical capacity to self-host a server application, teams that need an unlimited-user web-based project management tool at zero license cost, and organizations with data-residency requirements that prevent using commercial SaaS products.

Microsoft Planner Free: The In-the-Box Option

Microsoft Planner's free tier is available to anyone with a Microsoft 365 subscription (which most organizations already have). It provides task boards, basic scheduling, and Microsoft 365 integration (Teams, Outlook, SharePoint).

The free tier is limited: no Gantt chart, no dependency types, no critical path, no advanced reporting, and no portfolio views. It is a task management tool, not a project scheduling tool.

If you are evaluating Planner as a Microsoft Project Online replacement specifically, it is worth reading the Microsoft Planner Premium limitations post, which covers what even the paid Planner Premium tier does not provide for enterprise PMOs. The free tier's limitations are even more severe.

Planner Free is the right option for: teams that already have Microsoft 365, need basic task tracking within the Microsoft ecosystem, and do not need any form of scheduling precision. For actual project scheduling, Planner Free is not a realistic free Microsoft Project alternative.

Comparing the Free MS Project Alternatives: Six Dimensions

The diagram below shows where each free tier stands on the capabilities that matter most for teams migrating from Microsoft Project.

Feature	Onplana Free	GanttProject	ProjectLibre	OpenProject Community	Planner Free
Gantt chart	Yes	Yes	Yes	Yes	No
Dependency types	FS/SS/FF/SF + lag	FS only	FS/SS/FF/SF	FS/SS/FF/SF	FS only
.mpp import	Yes (up to 2 projects)	Limited	Yes	Limited	No
Cloud / web access	Yes (SaaS)	No (desktop)	No (desktop)	Self-hosted	Yes (M365)
AI features	Chat (one-time 100K tokens/seat)	None	None	None	None
Project limits	2 projects	Unlimited (local)	Unlimited (local)	Unlimited	Requires M365

How to Pick the Right Free Microsoft Project Alternative

The decision reduces to three questions.

Do you need to migrate existing .mpp files with full dependency fidelity? If yes, start with Onplana Free for a cloud pilot (native .mpp import, FS/SS/FF/SF preserved) or ProjectLibre for a desktop-only workflow. Run the free Migration Preview tool before committing data to any tool; it shows exactly what your .mpp file will look like after import.

Do you need more than two active projects at zero cost? If yes, the cloud options run out fast. OpenProject Community (self-hosted, unlimited) is the most capable free option beyond that limit if you have infrastructure to run it. ProjectLibre or GanttProject cover unlimited local files for desktop-only use cases.

Do you need cloud collaboration and a Gantt in the browser? Onplana Free is the strongest answer. It is the only option here that combines all four dependency types, a Gantt with critical path, native .mpp and Primavera import, AI, and real-time cloud collaboration at no cost. Two limits bind early and you should plan around both: two active projects and five members. For a team importing a couple of real Project Online schedules to see how faithfully they land before committing budget, that is enough to run a genuine test, and the Gantt is there to work in every day.

One thing the free tools cannot tell you: whether the tool will handle your full project portfolio at scale. The free tier is a proof-of-concept window, not a long-term plan for a 40-project PMO. Before committing to any platform, run a representative sample of your most complex projects through it and verify that the scheduling logic, resource model, and reporting structure survive the transition.

The best Microsoft Project alternatives 2026 guide covers the broader paid-tier landscape for teams whose requirements go beyond what any free tier can handle. The best project management software for small teams covers tools optimized for teams under 20 people, where free tiers are often sufficient for the full workload. If you are exploring the free Gantt chart tools specifically, that page covers the Gantt-specific comparison in more depth.

Run the free Migration Preview tool Upload a .mpp file and see exactly what your project data looks like after import: tasks, dependencies, resources, and baselines. No signup required. Takes about two minutes. → Open the Migration Preview

Microsoft Project Online™ is a trademark of Microsoft Corporation. Onplana is not affiliated with Microsoft.