LatticeDB

LatticeDB is a single-file embedded database designed for applications that need to query connected data by relationships, semantics, and text simultaneously. It combines graph traversal, HNSW vector similarity search, and BM25 full-text search in one query layer using Cypher syntax, with no server or configuration required. The project describes itself as built for relationship-heavy workloads on a single machine.

Features include ACID transactions, durable named streams with graph changefeeds, configurable vector indexing parameters, fuzzy search with Levenshtein distance, and a portable single-file format. Available as a CLI tool and via Python, Node.js, and Java bindings, it targets use cases like Graph RAG, agent memory systems, and local knowledge applications.