# Free Diagram Apps for Confluence — Free-Tier Limits & Licensing May 10, 2026 · 3 min read [NGPilot](https://ngpilot.com) Need diagram tools for Confluence without paying for a large team? NGPILOT's three diagramming apps — Mermaid Plus, Excalidraw Plus, and Graphviz Charts — are all **free for up to 10 users**. This guide compares them so you can pick the right free diagram plugin for your Confluence. ## Free diagram plugins for Confluence compared[​](#free-diagram-plugins-for-confluence-compared "Direct link to Free diagram plugins for Confluence compared") | Feature | Mermaid Plus | Excalidraw Plus | Graphviz Charts | | ------------- | ------------------------------------------- | ---------------------------------------- | ------------------------------------ | | Free tier | Up to 10 users | Up to 10 users | Up to 10 users | | Input method | Text / code | Visual canvas (drag & drop) | Text / DOT language | | Diagram types | 29 types | Freeform drawing | Directed/undirected graphs | | Best for | Flowcharts, sequence, Gantt, class diagrams | Whiteboarding, wireframes, brainstorming | Network topologies, dependency trees | | Live preview | Yes | Yes | Yes | | Templates | Built-in library | 220+ shape packs | DOT snippets | ## Mermaid Plus — free flowcharts, sequence & Gantt charts[​](#mermaid-plus--free-flowcharts-sequence--gantt-charts "Direct link to Mermaid Plus — free flowcharts, sequence & Gantt charts") [Mermaid Plus for Confluence](https://marketplace.atlassian.com/apps/1236814/mermaid-plus-for-confluence?hosting=cloud\&tab=overview) lets you write diagram code and renders it instantly. It supports **29 diagram types** including flowcharts, sequence diagrams, class diagrams, ER diagrams, Gantt charts, pie charts, mindmaps, and timelines. **Why it's great for free use:** * Text-based diagrams are fast to create and easy to maintain * 29 diagram types cover most documentation needs * One-click templates get you started immediately * Diagrams are versionable alongside your documentation Read the full guide: [Does Confluence support Mermaid?](/blog/does-confluence-support-mermaid.md). ## Excalidraw Plus — free whiteboarding & drawing[​](#excalidraw-plus--free-whiteboarding--drawing "Direct link to Excalidraw Plus — free whiteboarding & drawing") [Excalidraw plus Whiteboards for Confluence](https://marketplace.atlassian.com/apps/1237651/excalidraw-plus-whiteboards-for-confluence?hosting=cloud\&tab=overview) provides a visual canvas with drag-and-drop shapes, freeform drawing, and **220+ shape libraries**. It's like having a digital whiteboard in every Confluence page. **Why it's great for free use:** * Visual editor — no syntax to learn * 220+ shape packs (AWS, Azure, UML, networking, wireframes) * Perfect for brainstorming and quick sketches * Also available for Jira: [Excalidraw for Jira](/docs/Excalidraw-Diagrams-plus-Whiteboards-for-Jira/usage.md) ## Graphviz Charts — free network & dependency graphs[​](#graphviz-charts--free-network--dependency-graphs "Direct link to Graphviz Charts — free network & dependency graphs") [Graphviz Charts for Confluence](https://marketplace.atlassian.com/apps/1237659/graphviz-charts-for-confluence?hosting=cloud\&tab=overview) uses the DOT language to generate directed and undirected graphs with automatic layout. It excels at complex node-and-edge diagrams. **Why it's great for free use:** * Automatic layout — no manual positioning needed * Perfect for network topologies and dependency trees * DOT language is simple and expressive * Great for documenting infrastructure ## Which free diagram plugin should you install?[​](#which-free-diagram-plugin-should-you-install "Direct link to Which free diagram plugin should you install?") * **Need flowcharts and process diagrams?** → Mermaid Plus * **Need whiteboarding and freeform drawing?** → Excalidraw Plus * **Need network graphs and dependency trees?** → Graphviz Charts * **Need all of the above?** → Install all three — each is free for up to 10 users All three apps are available on the [Atlassian Marketplace](https://marketplace.atlassian.com/vendors/1226848/) with free trials. ## Get started[​](#get-started "Direct link to Get started") **Install free diagram plugins for Confluence:** [Browse all NGPILOT apps →](https://marketplace.atlassian.com/vendors/1226848/) ## Related resources[​](#related-resources "Direct link to Related resources") * [Mermaid Plus — marketplace](https://marketplace.atlassian.com/apps/1236814/mermaid-plus-for-confluence?hosting=cloud\&tab=overview) | [docs](/apps/mermaid-plus-for-confluence.md) * [Excalidraw Plus — marketplace](https://marketplace.atlassian.com/apps/1237651/excalidraw-plus-whiteboards-for-confluence?hosting=cloud\&tab=overview) | [docs](/apps/excalidraw-plus-for-confluence.md) * [Graphviz Charts — marketplace](https://marketplace.atlassian.com/apps/1237659/graphviz-charts-for-confluence?hosting=cloud\&tab=overview) | [docs](/apps/graphviz-charts-for-confluence.md) * [Confluence diagram tools comparison](/blog/confluence-diagram-tools-comparison.md) * [Drawing & diagramming tools guide](/blog/confluence-drawing-diagramming-tools.md) ## Related guides * [Best Diagram Tool for Confluence — Compared](/blog/confluence-diagram-tools-comparison.md) * [How to Create Mermaid Diagrams in Jira](/blog/how-to-create-mermaid-diagrams-jira.md) * [Export Jira Issues to Excel or CSV](/blog/export-jira-issues-to-excel.md) * [Bulk Download Jira Attachments](/blog/bulk-download-jira-attachments.md) Explore NGPILOT[Browse Solutions](/solutions.md)[All Apps](/apps.md)[Atlassian Marketplace →](https://marketplace.atlassian.com/vendors/1226848/?utm_source=ngpilot.com\&utm_medium=blog\&utm_campaign=hub-links) **Tags:** * [confluence](/blog/tags/confluence.md) * [diagrams](/blog/tags/diagrams.md) * [free](/blog/tags/free.md) * [mermaid](/blog/tags/mermaid.md) * [excalidraw](/blog/tags/excalidraw.md) * [graphviz](/blog/tags/graphviz.md) * [comparison](/blog/tags/comparison.md)