Knowledge Graphs

Build, reason over and serve knowledge graphs — ontologies, triple stores and graph context for agents.

Knowledge-extraction CLI: LLMs turn documents into structured graphs, hypergraphs and spatio-temporal knowledge — with an MCP server for agents and Obsidian vault export.

knowledge-graphsrag

→ pairs well with open-ontologies, omnigraph

ModernRelay 1k · 2 days ago

omnigraph

Lakehouse graph database for agent context — graph, vector and full-text retrieval fused in one runtime on branchable Lance/S3 storage; agent fleets write on isolated branches and merge Git-style.

memoryknowledge-graphs

→ pairs well with LangGraph, skillkit

databrickslabs 254 · yesterday

ontobricks

Turns Databricks Unity Catalog tables into a materialized knowledge graph: OWL ontology design, R2RML mapping, OWL 2 RL/SWRL/SHACL reasoning, auto-generated GraphQL — exposed to agents over MCP.

knowledge-graphs

→ alternative to open-ontologies, pgGraph

fabio-rovai 315 · 2 days ago

open-ontologies

Rust MCP server + desktop Studio for AI-native ontology engineering: 70+ tools over an in-memory Oxigraph store — OWL2-DL tableaux reasoning, SHACL, SPARQL, versioning. Single binary, no JVM.

knowledge-graphs

→ pairs well with Hyper-Extract, ontobricks

Evokoa 898 · 3 days ago

pgGraph

PostgreSQL extension adding graph search, traversal and shortest-path over your existing tables — a derived graph index queried from plain SQL, no separate graph DB or query language. Rust.

knowledge-graphsrag

→ alternative to ontobricks, omnigraph