Private knowledge tools source bundleCopy wiki link

This source card preserves primary evidence for the claim that private knowledge work is a combination gap, not an empty category.

• Obsidian Sync security and privacy documents optional E2EE for remote vaults, unrecoverable encryption-password loss, and unencrypted local vaults.
• Notesnook about page describes an open-source, subscription-funded E2EE note service intended for non-technical users.
• Joplin E2EE documentation describes open encrypted sync across user-selected targets and the operational complexity of enabling it across devices.

The evidence supports Open-source encrypted knowledge workspace and Privacy market gaps.