ketcher
The premium Open Source alternative to ChemDraw JS
🎯 Best for:Integrating molecule sketching into web apps.
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"
Your team could be burning cash. Switching to ketcher instantly boosts your runway.
Competitor Cost
-$1,440
/ year (est. based on ChemDraw JS)
Self-Hosted
$0
/ year
Team Size10 Users
150+
SAVE 100%