Smart Second Brain

Open-source Obsidian plugin adding semantic search, a knowledge graph, and an AI assistant over your notes.

Pluginfreeglobal

Smart Second Brain is a free, open-source Obsidian plugin that adds semantic search, an interactive knowledge graph, and a local-first AI assistant grounded in the user's own notes. It's for Obsidian users with large vaults who want to surface connections and answers that plain keyword search would miss.

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Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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