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Side-by-side features, use cases and pricing — because the right pick depends on your job and budget, not just the ranking.
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Mermaid Viewer
✓ verifiedFreemium
Browser-based Mermaid diagram editor with live preview, AI generation and multi-format export.
1.4K saves
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Open Apps
✓ verifiedFreemium
Curated directory of vetted open-source alternatives to paid SaaS, with health ratings and an OSS-migration service.
38K visits/mo
Pricing
Free: $0 (3 diagrams, watermarked export)
Starter: $69.99/yr (30 diagrams)
Pro: $119.99/yr (unlimited diagrams)
Stack Audit: $499 (one-time)
Core features
- ✦Live diagram preview while typing
- ✦AI (GPT-4) text-to-Mermaid generation
- ✦Export to SVG, PNG, PDF and Markdown
- ✦Syntax error highlighting and auto-correction
- ✦Real-time collaborative editing
- ✦Docker private deployment with access control
- ✦680+ curated open-source apps
- ✦Five-metric health rating per app
- ✦Category and alternative browsing
- ✦Open-source ecosystem insights and reports
- ✦OSS migration consultancy service
Use cases
- →Draft and preview Mermaid diagrams quickly
- →Generate diagrams from plain-text descriptions
- →Share and co-edit diagrams with a team
- →Self-host diagram editing for enterprises
- →Finding open-source replacements for SaaS tools
- →Cutting software costs by self-hosting
- →Comparing open-source project health
- →Getting help migrating a SaaS stack
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