# Gbrain

> Second-brain tool for AI agents

- Category: Agents & dev (`agents`)
- Tags: `free`, `open-source`
- Official: https://github.com/garrytan/gbrain
- Wunderlust: https://wunderlust.xyz/r/gbrain
- Image: https://wunderlust.xyz/media/gbrain-poster.jpg
- Video preview: https://wunderlust.xyz/media/gbrain.webm
- Added: 2026-11-05

## What it is

Second-brain tool for agents, cited among the knowledge-retrieval levels of a Claude Second Brain.

## What it’s for

For people exploring ways to give agents memory and knowledge retrieval.

## Benefits

- Sits among the approaches to knowledge retrieval for agents

## Caveats

- Description based on third-party accounts
- Its function isn't described in detail
- Those who promote it also promote a community and courses

## Similar on Wunderlust

- [OpenViking](https://wunderlust.xyz/r/openviking.md): Context database for agents that organizes memory and skills like a file system
- [Agent Browser](https://wunderlust.xyz/r/agent-browser.md): Tool that gives AI agents web browsing
- [Personal Context Portfolio](https://wunderlust.xyz/r/personal-context-portfolio.md): Ten markdown files of personal context for AI agents, with a guided interview
- [LightRAG](https://wunderlust.xyz/r/lightrag.md): A RAG framework with a knowledge graph and embeddings
- [QMD](https://wunderlust.xyz/r/qmd.md): Support tool for OpenClaw
- [Personal AI Infrastructure (PAI)](https://wunderlust.xyz/r/personal-ai-infrastructure.md): Personal AI infrastructure approach with memory, hooks and autonomy