5 Best Open Source LucidChart Alternatives
A curated collection of the 5 best open source and self-hosted alternatives to LucidChart in 2026.
Looking for a free, privacy-friendly, or self-hosted replacement for LucidChart 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 LucidChart 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.
Create flowcharts, sequence diagrams, Gantt charts, and more using a simple Markdown-like syntax that renders anywhere.
Create flowcharts, sequence diagrams, Gantt charts, and more using a simple Markdown-like syntax that renders anywhere.
Virtual whiteboard that works instantly on any device, no signup required, with real-time multiplayer collaboration built in.
Virtual whiteboard that works instantly on any device, no signup required, with real-time multiplayer collaboration built in.
Free online database diagram editor with SQL generation. Create ER diagrams, visualize relationships, export scripts, and reverse engineer schemas - no signup required.
Free online database diagram editor with SQL generation. Create ER diagrams, visualize relationships, export scripts, and reverse engineer schemas - no signup required.
Create professional diagrams online or offline with security-first approach. No registration needed. Works with Google Drive, SharePoint, Atlassian, and more.
Create professional diagrams online or offline with security-first approach. No registration needed. Works with Google Drive, SharePoint, Atlassian, and more.
About LucidChart
Create professional diagrams, flowcharts, and visual documentation with collaborative cloud-based diagramming software that transforms complex ideas into clear visuals.