Summary
Ben AI introduces Balder, an open-source alternative to Obsidian designed specifically for the “second brain” use case — giving AI agents like Claude persistent context and memory across sessions, providers, and entire teams. The video walks through the limitations that motivated the build: Obsidian lacks real-time team sync, granular permission settings, version history, and a native MCP connector for automating context updates.
Balder addresses each of these gaps. Team members can be onboarded by sharing a vault link rather than manually syncing folders, with real-time updates propagating across everyone’s instance simultaneously. Permission controls operate at the folder, subfolder, or individual file level, supporting shared, read-only, and private states with per-member overrides. Automatic daily backups and per-file version history with revert capability are built in.
The MCP integration is the centerpiece for AI power users: Balder exposes a connector that Claude (or any MCP-compatible agent) can use to read and write the second brain directly, enabling scheduled routines that pull in fresh meeting transcripts, email threads, or CRM data and keep the knowledge base current without manual intervention. The app is available as a self-hosted open-source install or a managed hosted version, both with a free tier. The video includes a full live demo of vault sharing, permission configuration, and MCP setup within Claude’s connector settings.
📺 Source: Ben AI · Published August 29, 2026
🏷️ Format: Showcase
