## [Best Diagram App for Jira — 2026 Comparison with Mermaid & Excalidraw](/blog/jira-diagram-apps-comparison.md)

April 18, 2026 ·

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7 min read

[NGPilot](https://ngpilot.com)

Every engineering team needs diagrams in Jira — architecture decisions on epics, bug reproduction flows on tickets, wireframes on stories. But Jira has no built-in diagramming. You either paste screenshots from external tools or install a marketplace app.

We built two diagram apps for Jira: **Mermaid+ Diagrams for Jira** for text-based diagrams using Mermaid syntax (flowcharts, sequence diagrams, ER models, C4 architecture), and **Excalidraw Diagrams + Whiteboards for Jira** for freeform drawing with 229 built-in shape libraries. In this post we compare both against every alternative on the Atlassian Marketplace.

**Tags:**

* [jira-diagrams](/blog/tags/jira-diagrams.md)
* [mermaid](/blog/tags/mermaid.md)
* [excalidraw](/blog/tags/excalidraw.md)
* [whiteboard](/blog/tags/whiteboard.md)
* [flowchart](/blog/tags/flowchart.md)
* [architecture-diagram](/blog/tags/architecture-diagram.md)
* [jira-plugin](/blog/tags/jira-plugin.md)

[**Read more**](/blog/jira-diagram-apps-comparison.md)