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Best OnUML Alternatives in 2026

12 platforms from AI diagram generators ranked against OnUML on the same published basis.

  1. 1
    Creately Free plan apiLinuxMacself-hostedWeb Free8.0
    OnUML vs Creately
  2. 2
    Mermaid Chart Free plan apiextensionWeb $12/mo7.6
    OnUML vs Mermaid Chart
  3. 3
    OpenCharts Free plan apiMacWebWin $9.99/mo7.3
    OnUML vs OpenCharts
  4. 4
    ArchitectureDiagram.ai Free plan apiWeb $4.99/mo7.2
    OnUML vs ArchitectureDiagram.ai
  5. 5
    Archway Free plan apiself-hostedWeb $12/mo7.1
    OnUML vs Archway
  6. 6
    Eraser Free plan apiextensionself-hostedWeb $15/mo7.1
    OnUML vs Eraser
  7. 7
    Nimbalyst Free plan iOSLinuxMacWin $16.67/mo7.1
    OnUML vs Nimbalyst
  8. 8
    sysdraw Free plan Web $6/mo7.1
    OnUML vs sysdraw
  9. 9
    LetDraw Free plan apiself-hostedWeb $5/mo6.8
    OnUML vs LetDraw
  10. 10
    Lucid Train WinMacLinux 6.0
    OnUML vs Lucid Train
  11. 11
    yUML Web 5.9
    OnUML vs yUML
  12. 12
    AI Diagram Maker Web 5.8
    OnUML vs AI Diagram Maker
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