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Best European alternatives to Plantuml in 2026

We found 1 EU-built alternative to Plantuml — GDPR-native, with verified data sovereignty and transparent rankings. No pay-to-win.

1 EU-built alternative to Plantuml

Mermaid

Developer Tools

EU Based

Mermaid is an open-source diagramming and charting tool that uses a simple Markdown-like syntax to generate diagrams such as flowcharts, sequence diagrams, Gantt charts, and more directly in the browser.

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