Each diagram is stored as attachments on its own page: the diagram file and a PNG preview. A small index entry powers the diagram list, search and comments. Settings, company templates, shared libraries and AI usage counts are kept in the app's Atlassian (Forge) storage.
Data leaves Atlassian only to load the draw.io editor and viewer from diagrams.net and, when someone uses AI, to send their request to Anthropic. Excalidraw and Mermaid run entirely inside Confluence.
If you uninstall, diagram files stay on your pages as attachments. Settings, templates and shared libraries are deleted. Read our privacy policy.