End-to-end encrypted notes that last 100 years
Open Source
E2E Encrypted
Zero Knowledge
Obsidian
Local-first markdown knowledge base
E2E Encrypted
Zero Knowledge
No Logs
Free / $4/mo sync
Personal use free forever. Obsidian Sync $4/mo for E2E encrypted sync.
Quick Specs
| Open Source | ✗ No |
|---|---|
| E2E Encrypted | ✓ Yes |
| Zero Knowledge | ✓ Yes |
| Self-Hostable | ✗ No |
| No Logs Policy | ✓ Yes |
| Audited | ✗ No |
| Jurisdiction | International |
| Pricing | Freemium |
About Obsidian
Powerful note-taking using local markdown files. Your notes stay on your device - no cloud required. Link notes together to build a knowledge graph. Huge plugin ecosystem.
Best For
Researchers, writers, anyone building long-term knowledge bases
Security Considerations
A tool is only as effective as its implementation. Consider these factors:
- Configuration matters: Default settings may not match your threat model. Review security options carefully.
- Training is essential: Tools protect nothing if your team doesn't use them correctly or consistently.
- Integration points: Consider how this tool connects with your existing systems and what data flows between them.
- Continuity planning: Ensure you have backup access methods and know the recovery process.
Need help implementing this securely? Take our free assessment or book a discovery call.
Other Note-Taking Options
Open source Evernote alternative with E2E sync
Open Source
E2E Encrypted
Zero Knowledge