GBrain
Garry Tan’s open-source memory layer for AI agents: sourced facts, hybrid search and a knowledge graph via MCP
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What is GBrain?
GBrain is Garry Tan’s open-source memory layer for AI agents: sourced facts, hybrid search and a knowledge graph via MCP It's designed for agent power users wanting durable memory.
About GBrain
Key Strengths
- Garry Tan’s open-source, markdown-first memory layer for AI agents
- Sourced facts, corrections, hybrid search and a typed knowledge graph
- Works with Claude Code, Codex, OpenClaw and Hermes via MCP
Limitations to Consider
- gbrain.ai (the listed URL) is a parked domain for sale
- Full always-on setup has real server and API costs
- Not on npm; the npm "gbrain" package is unrelated
Best For
Agent power users wanting durable memory.
Skip it if: You want a hosted memory service.
Pricing
flexible pricing options
Free and open source; you pay for hosting and model/API usage (checked Oct 14, 2026)
Sources
Pros, cons and pricing compiled from public sources (official pricing/docs pages, published reviews, user reports), not hands-on testing.
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What is GBrain?
GBrain is Garry Tan’s open-source memory layer for AI agents: sourced facts, hybrid search and a knowledge graph via MCP It's designed for agent power users wanting durable memory.
How much does GBrain cost?
GBrain offers flexible pricing options You can check pricing on their official website.
Who should use GBrain?
GBrain is best suited to agent power users wanting durable memory.