5 Best Open Source Microsoft Visio Alternatives
A curated collection of the 5 best open source and self-hosted alternatives to Microsoft Visio in 2026.
Looking for a free, privacy-friendly, or self-hosted replacement for Microsoft Visio in 2026? The top open-source alternative is Excalidraw — Virtual whiteboard for sketching diagrams, flowcharts, and wireframes with a distinctive hand-drawn look. Real-time collaboration built in..
Other highly rated open-source Microsoft Visio alternatives include Mermaid, Tldraw and drawDB.
Virtual whiteboard for sketching diagrams, flowcharts, and wireframes with a distinctive hand-drawn look. Real-time collaboration built in.
Virtual whiteboard for sketching diagrams, flowcharts, and wireframes with a distinctive hand-drawn look. Real-time collaboration built in.
Open-source diagramming and charting tool
Mermaid is an open-source diagramming and charting tool that allows you to create diagrams and visualizations using text and code. It is widely used for documentation, presentations, and collaborative projects. - Text-based diagramming: Define diagrams using simple, human-readable text syntax - Live editor: Real-time preview and editing of diagrams - Multiple diagram types: Supports flowcharts, sequence diagrams, Gantt charts, class diagrams, and more - Integration-friendly: Works with popular platforms like GitHub, GitLab, VS Code, and Notion - Collaborative features: Team-based diagram creation and sharing - Extensible: Customizable themes and plugins available - Award-winning: Winner of the 2019 JavaScript Open Source Award - Self-hostable: Can be deployed on your own infrastructure Mermaid is open-source software that can be self-hosted. The project is available on GitHub and provides documentation for deployment options. The core library is JavaScript-based and can be integrated into various applications and platforms.
Free instant collaborative whiteboard for all devices
tldraw is a free, instant virtual whiteboarding tool designed for seamless online collaboration without requiring user signups. Built to work across all devices—mobile, tablets, and desktops—it provides a simple yet powerful canvas for brainstorming, planning, and visual collaboration. - Instant Collaboration: Real-time multi-user editing with no signup required. - Cross-Platform Support: Fully functional on mobile, tablet, and desktop devices. - No Installation Needed: Access directly from your browser with zero setup. - Simple & Intuitive: Clean, user-friendly interface for quick adoption. - SDK for Developers: Build custom whiteboard experiences with the tldraw SDK. - Privacy-First: No forced account creation or tracking by default. tldraw is primarily a web-based SaaS application, but developers can leverage the tldraw SDK to build custom whiteboard solutions. The SDK enables self-hosting and integration into existing applications. The core library is open source under the MIT license, allowing for extensive customization and deployment flexibility.
Visual database schema editor and SQL generator
drawDB is a free online database schema design tool that simplifies database modeling and SQL generation. Whether you're designing a new database or reverse-engineering an existing one, drawDB provides a visual interface to create, edit, and export schemas with ease. - Visual Schema Design: Drag-and-drop interface to create and customize database diagrams with tables, relationships, and notes. - Multi-Dialect SQL Generation: Export clean DDL for PostgreSQL, MySQL, SQLite, MariaDB, SQL Server, Oracle, and more. - Real-Time Collaboration: Work together with your team in real time, with shared cursors and instant sync. - AI Schema Assistant: Describe your requirements and let AI draft tables, relationships, and types for you. - Reverse Engineering: Import existing DDL scripts to automatically rebuild your database diagram. - Cloud & Local Storage: Save diagrams to the cloud (Pro) or locally in your browser (free). - Export Options: Generate SQL scripts, save diagrams as JSON or images, and create migration scripts. - Customizable Workspace: Tailor the UI to fit your workflow with keyboard shortcuts, templates, and an infinite canvas. - Self-Hosting: Fully open-source with Docker support for running drawDB on your own infrastructure. - Issue Detection: Catch errors in your diagram to ensure generated SQL scripts are always correct. - Presentation Mode: Present your diagrams during team meetings and design reviews. drawDB is built with modern web technologies and can be self-hosted using Docker. The project is fully open-source, allowing you to customize and deploy it behind your own firewall for enhanced privacy and control. Self-Hosting Steps: bash git clone https://github.com/drawdb-io/drawdb cd drawdb docker compose up -d
Free open-source diagramming tool for teams
draw.io is a free, open-source diagramming application trusted by 100M+ users worldwide. Store your data wherever you want—we can't access it. - Privacy First: Store diagrams locally or in your preferred cloud (Google Drive, OneDrive, etc.). We never access your data. - Real-time Collaboration: Work together with shared cursors and seamless teamwork. - Backwards Compatible: Diagram files created in 2005 load in today's app—no obsolescence. - Cross-Platform: Native integrations with Google Drive, Microsoft 365, Atlassian, GitHub, VS Code, and Notion. - Embed Anywhere: Embed interactive diagrams in docs, wikis, or applications. Export to SVG, PNG, PDF, or keep editable. - No Sign-Up Required: Start diagramming instantly without accounts or credit cards. - Open Source: Apache 2.0 licensed with no artificial scarcity or enterprise tiers. - Independent: Privately held, VC-free, focused on great software over valuation growth. - Self-Hosted Options: Deploy draw.io on your own infrastructure using the open-source codebase. - Desktop App: Available for Windows, macOS, and Linux for offline diagramming. - Embeddable: Integrate diagrams into your applications via iframe or API. - Developer-Friendly: Extensive documentation and SDKs for custom integrations. View all integrations | GitHub Repository
About Microsoft Visio
Microsoft Visio
Microsoft Visio is a professional diagramming tool that helps teams visualize ideas, processes, and systems with ease. From flowcharts to network diagrams, Visio provides a comprehensive suite of templates and tools to transform complex data into clear, actionable visuals.
Key Features of Microsoft Visio
- Flowchart Creation: Build professional flowcharts with an extensive library of shapes, stencils, and templates to turn information into impactful stories.
- Mind Mapping: Simplify brainstorming with templates for visualizing problems and mapping solutions, shareable via Microsoft Teams.
- Organization Charts: Easily craft org charts to visualize team hierarchies and reporting structures.
- Network Diagrams: Illustrate system designs and network architectures with specialized templates and connector tools.
- Floor Plans: Design hybrid workspaces, retail layouts, or home plans with scalable templates and tools.
- Infographic Timelines: Create engaging project timelines for product launches, marketing plans, and employee growth initiatives.
- Accessibility Features: Supports Narrator, Accessibility Checker, and high-contrast modes to ensure diagrams are accessible to everyone.
- Enterprise Security: Shares Microsoft 365 security features, including Information Rights Management (IRM) for persistent file protection.
- Collaboration Tools: Real-time editing, commenting, and sharing via the Visio web app or Microsoft Teams integration.
- Power BI Integration: Connect diagrams to Power BI for enhanced data visualization and insights.
Tech / Self-Hosting
Microsoft Visio is a cloud-based SaaS application and is not available for self-hosting. It integrates seamlessly with Microsoft 365 and other Microsoft services, including Power BI and Teams.