Security & Data Handling
How ChemStitch protects your research data. We believe in transparency about what we do and don’t do with your structures.
Data Flow
All connections use TLS encryption in transit.
What We Don’t Do
- ×We don't sell your data
- ×We don't share your structures with anyone except the services that run ChemStitch, listed on our Subprocessors page
- ×We don't use your data to train AI models
- ×We don't require you to share your AI API key
BYO API Key Architecture
Your key, your costs, your control.
- Keys encrypted with AES-256-GCM before storage
- Keys are only used to make AI requests on your behalf
- You can delete your key at any time from Settings
- Your trial and plan include AI usage on our key, up to a daily limit
What Data Is Sent to AI Providers
- Your chat message and its structure context (SMILES representation), sent to OpenAI or Anthropic when you send a chat message
- Images you upload for structure recognition, sent to OpenAI
- Only sent when you use one of these AI features
- AI providers process the request and return results; no training on your data
Data Storage
Storage & encryption
- ✓Structures and documents stored in your private account in a managed PostgreSQL database
- ✓Encryption at rest, TLS in transit
- ✓No cross-user data sharing
Authentication
Access controls
- ✓Magic link authentication (email-based, no passwords)
- ✓Session tokens with automatic refresh
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