redis / redis

In-memory data structure store used as a cache, database, message broker, and vector/document query engine.

VectifyAI / PageIndex

Python library and SDK that builds a hierarchical tree index of documents so an LLM can reason through it for retrieval, without vector databases or chunking.

ModernRelay / omnigraph

Object-storage native graph database with git-style branching, a typed ontology, and hybrid graph, vector, and full-text retrieval over Lance files.