Open Brain

Open Brain is an infrastructure layer and database that connects multiple AI tools to a single persistent memory.

Open Brain acts as an infrastructure layer and database featuring vector search and an open protocol. It allows various AI tools like Claude, ChatGPT, and Cursor to share a single persistent memory of a user. The system includes a setup guide for building a database, AI gateway, Slack capture, and MCP server. Users can import data from sources such as ChatGPT, Obsidian, X, Instagram, and Google Activity. Extensions enable features like a household knowledge base, family calendar, meal planning, and a professional CRM.

Open Brain at a glance

Best for: Software engineer, Writer
Runs on: Web, API, Slack, Discord, Telegram, self-hosted, open source
Pricing: Free
Released: March 2026
Category: AI productivity tool
Website: github.com/NateBJones-Projects/OB1

Key features

Vector search
Open protocol
AI gateway
Data import recipes
MCP server connection
Shared memory across AI tools

Use it for

Manage household knowledge and maintenance
Coordinate multi-person family schedules
Plan meals and share grocery lists
Track professional network contacts and job hunts

Alternatives to Open Brain

Make0 Brain — Maintains persistent and portable memory across different AI applications.
OpenViking — Unifies agent memory, knowledge RAG, and skills into a single directory structure.
Basic Memory — Stores data in local Markdown files that remain accessible and readable by any AI.
Deep Recall — Keep your personal context and history when switching between different AI tools.
OpenUsage — Monitors AI usage limits locally to prevent service interruptions.
Obsidian Second Brain — Agent memory as plain Markdown notes that keep themselves current
Open Health Sync — It normalizes thirteen health data sources into one clean model with a single set of units.
Open Slide — Pages are built as React code by AI agents on a fixed canvas.
OpenJobs — Tailors resumes from a complete experience bank and requires your approval.
SiYuan — Privacy-first personal knowledge management with local storage and block-based editing.
Open Knowledge — Local-first open source markdown editor with built-in agent tools.
Openbroca — AI cleanup and translation turn messy speech into ready-to-send text directly in your apps.

All Open Brain alternatives