Build with the Soulcraft platform.

Brainy

MIT · Open Source · v7.30

The open-source knowledge operating system.

Vector search, graph relationships, and document storage unified in one library. Self-hosted, free forever, zero config — runs on its own up to millions of entities.

What is Brainy → Install Quick Start API reference

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Cortex

Native Rust · v3.0 coming Q3 2026

10B+ even on a laptop. 100B+ on a server.

The native Rust accelerator that scales Brainy from millions to billions. DiskANN algorithm (Microsoft Research, 2019), reimplemented in 100% Rust. Same Brainy code, same files, same API — scale by adding servers, no managed service in the middle.

How it scales → DiskANN Comparison Performance

Jump into Brainy

Brainy is where most developers start. It's MIT-licensed, runs on its own, and ships with everything you need to build a real knowledge graph.

What is Brainy?

Brainy is a knowledge operating system that combines three types of data intelligence into one simple API:

• Vector Search — Find content by meaning, not just keywords
• Graph Relationships — Connect entities with typed relationships (127 verb types)
• Document Filtering — Query metadata with MongoDB-style operators

This combination — called Triple Intelligence — lets you replace multiple specialized databases (Pinecone + Neo4j + MongoDB) with a single unified system.

Quick Example

import { Brainy, NounType, VerbType } from '@soulcraft/brainy'

const brain = new Brainy()
await brain.init()  // zero config — auto-detects everything

const reactId = await brain.add({
  data: "React — a JavaScript library for building user interfaces",
  type: NounType.Concept,
  metadata: { category: "frontend", year: 2013 }
})

// Triple Intelligence: vector + graph + metadata in one query
const results = await brain.find({
  query: "modern frontend frameworks",       // vector similarity
  where: { year: { greaterThan: 2015 } },         // metadata filter
  connected: { to: reactId, depth: 2 }            // graph traversal
})

Key Brainy Features

Jump into Cortex

Cortex is the native Rust accelerator. Same Brainy code, same files, same API — orders of magnitude faster on vector search, aggregation, and large graph traversals at billion-scale.