Lettria

Lettria is a document intelligence and graph context platform for regulated industries. It unifies structured data and unstructured knowledge into ontology powered knowledge graphs, so that enterprise AI answers are grounded and traceable. The company offers two routes: Knowledge Studio, a GraphRAG platform for knowledge and business teams, and Perseus, a developer platform for generating ontologies and knowledge graphs from domain data with business experts kept in the loop. It is aimed at organizations in fields such as engineering, healthcare and retail that need reliable extraction and reasoning across technical documentation, biomedical research or product catalogs. The vendor positions GraphRAG against vector search for questions that require reasoning across connected facts, and lists compliance features including SSO, SAML, audit logs, SIEM export, cloud or VPC deployment and on premises options. GraphRAG engagements start with a scoped pilot of 8 to 12 weeks, followed by production deployment or embedded ontology experts, all priced by scope with no seat fees or per query meters. Perseus has three tiers. Developer is free, with a 30 KB input limit, 5 graph builds and 1 ontology build every 30 days. Plus is pay per use at $0.01 per PCU, with a 1 MB input limit, 3,000 graph builds and 300 ontology builds every 30 days. Enterprise pricing is custom.