Conceptboard alternatives · Whiteboards
Open-source alternatives to Conceptboard
Conceptboard is not described as open source on its own site. 12 of the 98 other whiteboard and mind map tools in this directory are open source, according to their own sites.
Conceptboard has a free plan. Paid plans start at 5€ per user / month (billing period not stated; monthly and yearly billing are offered). All of them are free or have a free plan.
12 tools · Listings checked up to Nov 13, 2026 · Where the facts come from
How each one differs from Conceptboard
- Free plan · from $8/mo
Parabol
Retrospectives, standups and sprint poker for agile teams
- Parabol starts at $8 per active user / month. Conceptboard starts at 5€ per user / month (billing period not stated; monthly and yearly billing are offered).
- Parabol is open source, according to its own site.
- Conceptboard also covers whiteboard and kanban boards.
- Free
draw.io
Free diagram editor that saves files to storage you choose
- draw.io is free. Conceptboard starts at 5€ per user / month (billing period not stated; monthly and yearly billing are offered).
- Only draw.io lists macOS, Windows and Linux apps.
- draw.io is open source and self-hostable, according to its own site.
- draw.io also covers diagrams.
- Free plan · from $6/mo
Excalidraw
Open-source whiteboard for hand-drawn style sketches and diagrams
- Excalidraw starts at $6 per user / month, billed annually. Conceptboard starts at 5€ per user / month (billing period not stated; monthly and yearly billing are offered).
- Excalidraw is open source, self-hostable and end-to-end encrypted, according to its own site.
- Excalidraw also covers diagrams.
- Conceptboard also covers templates, tasks and kanban boards.
- Free
Freeplane
Free, open source mind mapping app for the desktop
- Freeplane is free. Conceptboard starts at 5€ per user / month (billing period not stated; monthly and yearly billing are offered).
- Only Freeplane lists Windows, macOS and Linux apps.
- Only Conceptboard lists a web app.
- Freeplane is open source, according to its own site.
- Free
OpenBoard
Free open-source interactive whiteboard software for classrooms
- OpenBoard is free. Conceptboard starts at 5€ per user / month (billing period not stated; monthly and yearly billing are offered).
- Only OpenBoard lists Windows, macOS and Linux apps.
- Only Conceptboard lists a web app.
- OpenBoard is open source, according to its own site.
- Free
Pencil Project
Free open-source desktop tool for GUI mockups and diagrams
- Pencil Project is free. Conceptboard starts at 5€ per user / month (billing period not stated; monthly and yearly billing are offered).
- Only Pencil Project lists macOS, Windows and Linux apps.
- Only Conceptboard lists a web app.
- Pencil Project is open source, according to its own site.
- Free
PlantUML
Draw UML and other diagrams from plain-text descriptions
- PlantUML is free. Conceptboard starts at 5€ per user / month (billing period not stated; monthly and yearly billing are offered).
- Only PlantUML lists a browser extension.
- PlantUML is open source, according to its own site.
- PlantUML also covers Gantt & timelines, mind mapping and diagrams.
- Free plan · from $2/mo
Flowchart Fun
Text-based flowchart maker that draws diagrams as you type
- Flowchart Fun starts at $2 per month (billing basis not stated). Conceptboard starts at 5€ per user / month (billing period not stated; monthly and yearly billing are offered).
- Flowchart Fun is open source, according to its own site.
- Flowchart Fun also covers mind mapping and diagrams.
- Conceptboard also covers whiteboard, templates, tasks and kanban boards.
- Free
WiseMapping
Free open-source online mind mapping with a self-hosted option
- WiseMapping is free. Conceptboard starts at 5€ per user / month (billing period not stated; monthly and yearly billing are offered).
- Only WiseMapping lists macOS, Windows and Linux apps.
- WiseMapping is open source and self-hostable, according to its own site.
- WiseMapping also covers mind mapping.
- Free
Markmap
Free open-source tool that turns Markdown outlines into mind maps
- Markmap is free. Conceptboard starts at 5€ per user / month (billing period not stated; monthly and yearly billing are offered).
- Markmap is open source, according to its own site.
- Markmap also covers Markdown, mind mapping and diagrams.
- Conceptboard also covers whiteboard, templates, tasks and kanban boards.
- Free plan · from £300/mo
Structurizr
Open-source models-as-code tool for C4 architecture diagrams
- Structurizr starts at £300 per month for up to 20 unique users, per server installation. Conceptboard starts at 5€ per user / month (billing period not stated; monthly and yearly billing are offered).
- Structurizr is open source and self-hostable, according to its own site.
- Structurizr also covers diagrams.
- Conceptboard also covers whiteboard, templates, tasks and kanban boards.
- Free
nomnoml
Text-to-UML diagram editor with a live preview
- nomnoml is free. Conceptboard starts at 5€ per user / month (billing period not stated; monthly and yearly billing are offered).
- nomnoml is open source, according to its own site.
- nomnoml also covers diagrams.
- Conceptboard also covers whiteboard, templates, tasks and kanban boards.
Common questions
Is there an open-source alternative to Conceptboard?
Yes. Parabol, draw.io, Excalidraw, Freeplane, OpenBoard, Pencil Project, PlantUML, Flowchart Fun and 4 more are open source, according to their own sites.
Is Conceptboard open source?
Conceptboard is not described as open source on its own site. The listing was checked on Nov 12, 2026 against the pages it cites.
When was this checked?
Each listing shows its own date. On this page they run from Oct 5, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.
This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Conceptboard: the alternatives its listing names first, then the tools that share the most features with it.