Work / AI & Machine Learning
Hybrid AI Search

Neo4j + Pinecone RAG System

A hybrid AI search and retrieval system combining Neo4j graph database with Pinecone vector search, orchestrated by LangChain and deployed on AWS.

Hybrid RAG
Architecture
LangChain
Orchestration
Neo4j Aura
Graph DB
AWS
Infrastructure

Overview

A hybrid AI search and retrieval system combining Neo4j graph database with Pinecone vector search, deployed on AWS. Uses LangChain for orchestration, enabling queries that require both semantic understanding and relationship traversal simultaneously.

The Challenge

Pure vector search finds semantically similar content but misses structural relationships. Pure graph search captures relationships but struggles with semantic similarity. Enterprise AI applications need both: find documents semantically AND traverse the relationship graph to find connected entities — a capability neither database achieves alone.

What We Built

Built a hybrid retrieval architecture using Pinecone for vector-based semantic search and Neo4j Aura for relationship-based graph traversal. LangChain orchestrates the pipeline, deciding when to use vector search vs. graph traversal based on query type. AWS hosts the infrastructure. The system answers complex questions that require both semantic understanding and graph reasoning.

Results

  • Hybrid RAG — Architecture. Vector (Pinecone) + Graph (Neo4j) retrieval
  • LangChain — Orchestration. Intelligent query routing and synthesis
  • Neo4j Aura — Graph DB. Managed graph database for relationship traversal
  • AWS — Infrastructure. Cloud-native deployment and scaling
More Work

Related case studies.

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