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Open Ontologies is written in Rust. It ships as one binary.

Carrel is a self-hosted knowledge base for AI agents. It automates document parsing, indexing, and retrieval, with optional knowledge graphs. Agents use its API to retrieve source passages, images, and related facts, then generate their own answers.

The enterprise world model built by DeepLethe. It is the first open substrate for knowledge engineering that learns passively and governs itself.

Graph-Native Infrastructure for Context and Accountable AI Systems

Connect your company's data, let an agent draft an ontology over it, and load it into HelixDB as one graph you can explore and ask questions of. com, or run it on your own machine.