Lettria

What it does

Lettria is a graph context layer for enterprise AI. It unifies structured data and unstructured knowledge into ontology-powered graphs. Teams use GraphRAG for traceable answers and Perseus to build graph agents.

Lettria targets teams that need AI answers they can trace and defend. The platform builds ontologies from domain data, turns documents, tables and exports into knowledge graphs, and answers queries through graph reasoning with provenance. The homepage states that Lettria structures complex documentation, scientific knowledge and enterprise data into AI systems that are reliable, traceable and usable in production. It lists finance, healthcare, legal and engineering as sectors. GraphRAG is sold and scoped with your team, and every engagement starts with a scoped pilot and a clear ontology plan. Perseus is the platform, free to start, with a Developer tier that has a 30 KB max input size, 5 graph builds per 30 days and 1 ontology build per 30 days. Paid tiers are Plus at 0.01 dollars per PCU and Enterprise with custom pricing. The homepage does not state whether an account is required, whether an API is available, or whether the software is open source. A careful buyer should confirm pilot scope and data residency before committing.