Best Open-Source Project Management Tools from Europe

Project management tools are the operational backbone of modern teams. They track who is working on what, when deadlines fall, how time is spent, and how projects progress from idea to delivery. This makes them rich repositories of personal data: employee names, workload patterns, performance indicators, and client project details all live in your PM tool. When that tool is operated by a US company like Asana, Trello (Atlassian), or Notion, this operational data is processed under US jurisdiction.

Europe has produced excellent open-source project management tools that combine professional-grade features with the transparency and control that only open-source software provides. Self-hosting these tools on your own EU infrastructure gives you complete data sovereignty, but even their cloud-hosted versions offer EU data residency and GDPR compliance by default.

Why Open Source for Project Management?

Open-source project management tools offer three distinct advantages over proprietary SaaS platforms.

First, data sovereignty through self-hosting. When you deploy an open-source PM tool on your own servers or your chosen EU cloud provider, you have absolute control over where your data lives, who can access it, and how long it is retained. No third party processes your project data. For organisations in regulated industries or those handling government contracts, this level of control is often a requirement, not a preference.

Second, transparency. With open-source software, you can audit the codebase to verify exactly how your data is processed, stored, and protected. There are no black boxes, no hidden telemetry, and no surprise data sharing with third parties. This transparency makes it significantly easier to complete GDPR data protection impact assessments and demonstrate accountability to data protection authorities.

Third, no vendor lock-in. Your project data is stored in a database you control, in formats you can export at any time. If you ever want to switch tools or migrate to a different hosting provider, your data moves with you. With proprietary SaaS tools, you are dependent on the vendor’s export capabilities and goodwill.

OpenProject: Enterprise-Grade PM from Germany

OpenProject is developed by OpenProject GmbH in Berlin, Germany, and is one of the most feature-complete open-source project management platforms available. It covers the full spectrum of project management methodologies: Gantt charts for waterfall planning, agile boards for scrum and kanban workflows, and hybrid approaches that combine both.

OpenProject includes time tracking, cost reporting, meeting management, a wiki for documentation, and a work package system that serves as the central unit for tasks, user stories, bugs, and milestones. The Gantt chart implementation is particularly strong, with dependency tracking, critical path highlighting, and baseline comparisons that rival commercial tools like Microsoft Project.

For teams that need structured project management with formal processes, such as engineering firms, government agencies, or organisations following PRINCE2 or PMI methodologies, OpenProject provides a depth of features that most SaaS alternatives lack. The platform supports multi-project portfolios, cross-project reporting, and custom workflows that adapt to your organisation’s processes.

OpenProject offers both a community edition (free, self-hosted) and an enterprise edition with additional features like LDAP integration, two-factor authentication, and professional support. The cloud-hosted version runs on EU infrastructure in Germany, making it straightforward for teams that want OpenProject’s features without managing their own servers.

Taiga: Agile-First PM from Spain

Taiga is developed by Kaleidos Ventures in Madrid, Spain, and takes a deliberately opinionated approach to project management. Where OpenProject aims to cover every methodology, Taiga focuses on agile workflows and does them exceptionally well. The interface is designed for scrum and kanban teams, with sprint planning, backlog grooming, burndown charts, and velocity tracking as first-class features.

Taiga’s interface is one of its strongest assets. It is clean, modern, and pleasantly free of the visual clutter that plagues many PM tools. The user experience is designed for developers and product teams who want to focus on their work rather than wrestling with project management overhead. Drag-and-drop task management, intuitive sprint planning, and a well-designed backlog view make daily use efficient and enjoyable.

Beyond scrum and kanban, Taiga includes an issues module for bug tracking, a wiki for documentation, and integration capabilities via webhooks and a REST API. The platform supports epics for large initiatives that span multiple sprints, and its reporting features provide clear visibility into team velocity and sprint progress.

Taiga is fully open source and can be self-hosted on your own infrastructure. The cloud-hosted option processes data within the EU. For agile teams that want a focused, well-designed tool without the complexity of enterprise PM platforms, Taiga delivers an excellent balance of capability and usability.

OpenProject vs Taiga: Which Fits Your Team?

The choice between OpenProject and Taiga comes down to your team’s methodology and complexity requirements.

Choose OpenProject if you need Gantt charts, waterfall planning, time and cost tracking, or multi-project portfolio management. OpenProject excels for organisations that manage complex projects with formal processes, dependencies, and reporting requirements. It is the stronger choice for engineering, construction, government, and enterprise teams.

Choose Taiga if your team runs agile sprints and wants a clean, focused tool that does scrum and kanban exceptionally well. Taiga is ideal for software development teams, product teams, and startups that prioritise velocity and simplicity over comprehensive project accounting. Its interface will feel immediately familiar to teams experienced with agile workflows.

Both tools are open source, both can be self-hosted, and both offer cloud-hosted options with EU data residency. Neither is a wrong choice; they simply serve different working styles.

The Self-Hosting Advantage

Self-hosting an open-source PM tool on your own EU infrastructure is the gold standard for GDPR compliance in project management. Your data never touches a third party’s servers. You control encryption, access, backups, and retention policies. You can demonstrate to any data protection authority exactly where your data is stored and how it is protected.

The operational effort of self-hosting has decreased significantly in recent years. Both OpenProject and Taiga offer Docker-based deployments that can be up and running in under an hour on any EU cloud provider. Managed Kubernetes services from European providers like Hetzner or Scaleway make scaling and maintenance straightforward. For teams with even modest DevOps capability, self-hosting is no longer the burden it once was.

If self-hosting is not feasible, both platforms’ cloud-hosted versions provide EU data residency with transparent data processing agreements. The cloud option trades some control for convenience while still keeping your data within European jurisdiction.

Migrating from US-Based PM Tools

Moving away from Trello, Asana, or Notion is achievable with planning. Most US-based PM tools offer data export in CSV or JSON formats. OpenProject provides importers for common formats, and Taiga supports CSV import for its backlog and task modules.

The migration is also an opportunity to clean up your project data. Archive completed projects, remove inactive users, and review your task structures. When you import into a European tool, you start with a clean, well-organised project environment that is fully GDPR-compliant from day one.

Start with a pilot team or a single project to validate that the new tool meets your workflow requirements. Once confirmed, roll out across the organisation with confidence that your project data is under your control and within EU jurisdiction.

Explore all European project management tools or compare Trello alternatives, Asana alternatives, and Notion alternatives to find your ideal fit.