Keywords AI

Neo4j vs Weaviate

Compare Neo4j and Weaviate side by side. Both are tools in the Vector Databases category.

Quick Comparison

	Neo4j	Weaviate
Category	Vector Databases	Vector Databases
Pricing	Freemium	Open Source
Best For	Enterprises that need a mature, production-grade graph database	Developers who need a flexible, open-source vector database with multimodal and hybrid search
Website	neo4j.com	weaviate.io
Key Features	Native graph database with Cypher query language ACID-compliant transactions Graph data science library GenAI integrations Enterprise clustering and scaling	Open-source vector database Hybrid search (vector + keyword) Multi-modal support GraphQL and REST APIs Kubernetes-native deployment
Use Cases	Knowledge-augmented RAG systems Fraud detection and network analysis Recommendation engines Identity and access management Supply chain optimization	Multimodal search across text, images, and more RAG with hybrid retrieval E-commerce product search Content recommendation engines Self-hosted vector search

When to Choose Neo4j vs Weaviate

Choose Neo4j if you need

Knowledge-augmented RAG systems
Fraud detection and network analysis
Recommendation engines

Pricing: Freemium

Choose Weaviate if you need

Multimodal search across text, images, and more
RAG with hybrid retrieval
E-commerce product search

Pricing: Open Source

How to Choose a Vector Databases Tool

Key criteria to evaluate when comparing Vector Databases solutions:

Query performanceSearch latency and throughput at your expected data scale and query volume.

ScalabilityHow well the database handles growing from thousands to billions of vectors.

Hosting modelFully managed cloud, self-hosted, or embedded options depending on your infrastructure needs.

Filtering supportAbility to combine vector similarity search with metadata filters efficiently.

Integration ecosystemNative integrations with popular frameworks like LangChain, LlamaIndex, and Haystack.

About Neo4j

Neo4j is the world's leading graph database, widely used for building knowledge graphs that power AI applications. Its native graph storage and Cypher query language enable complex relationship queries, pattern matching, and path finding. Neo4j's GenAI integrations include vector search, LLM-powered knowledge graph construction, and GraphRAG capabilities that combine structured graph data with LLM reasoning for more accurate, explainable AI.

View Neo4j profile →Visit website

About Weaviate

Weaviate is an open-source vector database that combines vector search with structured filtering and generative capabilities. It supports multiple vectorization modules, hybrid search (combining BM25 and vector search), and built-in integrations with LLMs for retrieval-augmented generation. Weaviate offers both self-hosted and managed cloud deployments, with a GraphQL API that makes it easy to query complex data structures.

View Weaviate profile →Visit website

What is Vector Databases?

Purpose-built databases for storing, indexing, and querying high-dimensional vector embeddings used in semantic search, RAG, and recommendation systems.

Browse all Vector Databases tools →

Frequently Asked Questions

What is a vector database?▾

A vector database stores high-dimensional numerical representations (embeddings) of data like text, images, or audio, and enables fast similarity search across millions or billions of vectors using approximate nearest neighbor algorithms.

Do I need a dedicated vector database or can I use pgvector?▾

For small to medium datasets (under 10 million vectors), pgvector in PostgreSQL works well and avoids adding another service. For larger datasets or when you need advanced features like hybrid search and real-time indexing, a dedicated vector database is recommended.

How do I choose the right embedding model for my vector database?▾

Match the embedding model to your use case. For general text search, models like OpenAI text-embedding-3 or Cohere embed-v3 work well. For domain-specific applications, consider fine-tuned models. Always benchmark with your actual data.