Lettria

Lettria is a web and API platform for enterprises in regulated industries that turns unstructured documents into structured, traceable knowledge graphs for research, compliance, and decision support.

Key capabilities include:

• Multimodal document parsing for complex PDFs, including scanned documents, tables, multi-column layouts, reading order, and multilingual content.
• Ontology building and enrichment to automatically generate domain-specific ontologies from internal documents and align terminology for consistent, governed outputs.
• Text-to-graph extraction to identify entities, events, relationships, and constraints, then populate graph databases (integrations include Neo4j, Amazon Neptune, and Ontotext).
• GraphRAG to combine vector semantic search with graph queries, delivering conversational answers with source references for auditability and review.

Pricing: Not publicly listed.

What makes it notable: Lettria focuses on transparency and compliance for high-risk workflows, emphasizing source traceability, role-based governance, GDPR-oriented practices, and on-premise or sovereign deployment options. It also received €4 million in France 2030 R&D funding for its LettRAGraph initiative and provides benchmarks for ontology and text-to-graph methods.