Tired of ChemDraw pricing?
There’s a modern alternative.
Draw structures, calculate properties, predict reactions, and export publication-quality figures — in your browser, no install required. Priced for individual researchers, not enterprise budgets.
Everything you need in a structure editor
ChemStitch covers the core workflows chemists use every day — structure drawing, property calculation, reaction prediction, and publication export.
Professional structure drawing
Draw with Ketcher — bonds, atoms, rings, templates, and keyboard shortcuts. Import from ChemDraw (CDXML), MOL, SDF, and SMILES.
Property calculation
Molecular weight, logP, H-bond donors/acceptors, TPSA, Lipinski Rule of Five — computed by RDKit with deterministic accuracy.
Reaction prediction & schemes
Draw reactants, describe reagents, see predicted products. Multi-step scheme drawing with reaction arrows and RXN export.
Retrosynthesis suggestions
Draw your target molecule and get multi-step retrosynthetic analysis with starting materials and reagents.
Publication-quality export
PNG, SVG, and PDF export with journal-standard formatting. Copy structures to clipboard for Word and PowerPoint.
IUPAC naming & structure OCR
Get systematic names for any structure. Paste an image of a molecule and convert it to an editable structure.
ChemStitch vs. ChemDraw vs. Ketcher
How ChemStitch compares to the tools you already know.
| ChemStitch | ChemDraw | Ketcher | |
|---|---|---|---|
| Annual cost | Free trial, then paid | ~$200–1,200+/yr | Free |
| Web-based (no install) | |||
| Structure drawing | |||
| Property prediction | |||
| Retrosynthesis | Partial | ||
| IUPAC naming | |||
| Batch analysis (SDF) | |||
| Structure OCR from images | |||
| PubChem search |
Try it free
Try ChemStitch free for 14 days — no credit card required. Sign up and start drawing structures in minutes.
No credit card required. Free for 14 days — we’ll email you a sign-in link.