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Knowledge Graphs

Graphiti, FalkorDB, Neo4j, GraphRAG, and entity extraction. 10 articles, written by the engineers building AI App Lab.

Graphiti Tutorial: Temporal Knowledge Graphs for AI Agents with Bi-Temporal Edges and Hybrid Search

Graphiti tutorial 2026: temporal knowledge graphs, episodes, bi-temporal edges, entity resolution, edge invalidation, hybrid search, Neo4j/FalkorDB, MCP server, agent memory, add_episode, and production checklist.

May 28, 2026 14 min read

pgvector Knowledge Graph Hybrid: Vector Search and Graph Traversal in PostgreSQL for 2026

pgvector knowledge graph hybrid 2026: pgvector HNSW IVFFlat, Apache AGE Cypher, recursive CTE graph traversal, hybrid retrieval RRF fusion, single PostgreSQL for vectors and graphs, and production checklist.

May 23, 2026 16 min read

Entity Extraction with LLMs: spaCy, GLiNER, and LLM Structured Output Comparison for 2026

Entity extraction LLM 2026: spaCy vs GLiNER vs LLM structured output. Zero-shot NER, relation extraction, GLiREL, LLMGraphTransformer, hybrid pipeline, F1 benchmarks, confidence thresholds, and production checklist.

Mar 9, 2026 15 min read

FalkorDB vs Neo4j: Graph Database Comparison for GraphRAG, Performance, and AI Applications

FalkorDB vs Neo4j 2026: sparse matrix vs index-free adjacency, ultra-low latency, multi-graph tenancy, GraphRAG-SDK, OpenCypher, vector index, Bolt protocol migration, LangChain LlamaIndex, Docker, and developer checklist.

Mar 3, 2026 13 min read

Cypher Query Tutorial: MATCH, CREATE, MERGE, and Graph Traversal for GraphRAG Applications

Cypher query tutorial 2026: MATCH, CREATE, MERGE, WHERE, RETURN, multi-hop traversal, shortest path, vector search, GraphRAG retrieval, Python neo4j driver, FalkorDB OpenCypher, and developer checklist.

Dec 7, 2025 14 min read

Build Knowledge Graph from Documents: LLM Extraction Pipeline with Neo4j and LlamaIndex

Build knowledge graph from documents: LLM entity extraction, SchemaLLMPathExtractor, Neo4j Cypher upsert, LangChain LLMGraphTransformer, chunking, embedding, hybrid retrieval, and production checklist for 2026.

Oct 23, 2025 13 min read

GraphRAG Tutorial: Microsoft GraphRAG, LightRAG, and Neo4j Implementation Guide for 2026

GraphRAG tutorial 2026: Microsoft GraphRAG community detection, LightRAG dual-level retrieval, Neo4j hybrid. Global vs local vs DRIFT search, indexing cost, token economics, Python API, and production checklist.

Sep 25, 2025 14 min read

Neo4j Python Tutorial: Driver, Transactions, GraphRAG, and LLM Integration for 2026

Neo4j Python tutorial 2026: GraphDatabase driver, sessions, transactions, execute_write, async, connection pool, neo4j-graphrag, LangChain, LlamaIndex, vector index, Docker, and production checklist.

Sep 20, 2025 13 min read

FalkorDB Docker: Production Deployment with Persistence, Clustering, and GraphRAG-SDK

FalkorDB Docker 2026: docker-compose production setup, persistent volumes, AOF durability, multi-graph tenancy, FalkorDB Browser, clustering, GraphRAG-SDK, Python client, and deployment checklist.

Jul 31, 2025 13 min read

What Is a Knowledge Graph? Entities, Relationships, and GraphRAG for LLM Applications

Knowledge graph explained: entities, relationships, triples, property graph vs RDF, Neo4j vs FalkorDB, GraphRAG vs vector RAG, Cypher queries, LLM extraction, schema design, and developer checklist for 2026.

Jul 3, 2025 14 min read