ketcher

The premium Open Source alternative to ChemDraw JS

🎯 Best for:Integrating molecule sketching into web apps.
Visit WebsiteCompare with ChemDraw JS
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Apache-2.0License

What is ketcher?

Replaces commercial web-based molecule editors like ChemDraw JS. It provides a high-performance React-based canvas for drawing complex chemical structures and reactions.

Tech Stack
TypeScriptChemistry & Materials

Why ketcher?

  • React-ready component
  • SVG rendering
  • Modular architecture

Limitations

  • Browser resource usage
  • Limited 3D features
  • Complex state management
3/5/2026
Last Update
225
Forks
1,256
Issues
Apache-2.0
License
Financial Leak Detected

Stop the "SaaS Tax"

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Competitor Cost
-$1,440
/ year (est. based on ChemDraw JS)
Self-Hosted
$0
/ year
Team Size10 Users
150+
SAVE 100%

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