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3 tools selected

Mermaid

Turn text into flowcharts, sequence diagrams, and charts

Toolora score92Free tier

Free

Flowcharts that live in a file, not a lock-in

Toolora score92Free

Free

Local-first knowledge base with linked notes

Toolora score95Free

Free for personal use

Spec	Mermaid	diagrams.net	Obsidian
Category	Productivity	Productivity	Productivity
Pricing	Free + mermaid.ai	Free	Free for personal use + Sync/Publish paid
Toolora score	92/100	92/100	95/100
Best for	diagrams, flowcharts, markdown, docs	diagrams, flowchart, uml, free	notes, pkms, markdown, local
Top features	·Live editor ·Flowcharts and sequence diagrams ·Markdown-style syntax	·Flowcharts and UML ·Save to Drive or disk ·Desktop app option	·Local markdown vaults ·Graph view and backlinks ·Huge community plugins