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AI that understands your document
and delivers verified knowledge
Extract reliable insights from complex, high-risk documents with full traceability.
5 stars
Trusted by leading teams processing thousands of documents every month.
Helping analysts cracking big issues in every industry
60% faster evidence-based research for medical teams, with full traceability.
Lettria helps medical and scientific teams query clinical trials, publications, and internal documents with answers grounded in explicit sources, evidence, and context, ready for review and validation.
"Lettria lets us maintain consistent terminology across documents, making AI outputs reliable and compliant."
Regulatory Affairs Lead, Pharmaceutical Group
Financial teams analyze complex financial disclosures in minutes.
Lettria provides reliable financial insights, grounded in explicit sources and context.
"Lettria helps us extract and organize complex financial data, so our AI systems provide answers that are traceable and auditable."
Head of IA, International Bank
Legal teams review regulations with 40% fewer document cross-checks.
Lettria helps legal teams query regulations with answers grounded in source documents.
"With Lettria, reviewing contracts and legal documents becomes faster, while keeping control over definitions and interpretation"
Legal Operations Manager, Law firm
Engineers resolve issues 3× faster with verified document intelligence.
Lettria delivers verifiable, step-by-step insights from complex technical documents.
"Our partnership with Lettria has enabled our teams to integrate AI into their workflows. Their collaborative approach and understanding of our challenges has resulted in the implementation of a solution that supports our experts on a daily basis in the analysis of complex technical documents’"Lettria helps us extract and organize complex financial data, so our AI systems provide answers that are traceable and auditable."
Jesse Berger, IS Manager
From complex documents to actionable insights
Lettria’s four core modules work together to extract structure, build knowledge, and deliver fully traceable outputs, grounded in your own data.
Document Parsing
Extracts tables, diagrams, reading order, and multi-column layouts from the most complex PDFs.
Ontology Building
Automatically generates clean, domain-specific ontologies from your documents, no manual mapping required.
Text to Graph
Converts any text into a rich knowledge graph with entities, relations, and constraints.
GraphRAG
Combines graph retrieval with reasoning for transparent, interpretable outputs without hallucinations.
Trusted by leading teams
How leading teams boost accuracy, automation, and scalability with Lettria.
new classes added
Automated ontology enrichment at scale.
“Lettria accelerated our enrichment process and improved recommendation accuracy."
articles processed
Scalable extraction for biomedical research.
“Lettria significantly improved the accuracy and scalability of our biomedical knowledge extraction.”
better accuracy
Faster, more accurate outcomes using GraphRAG.
“Lettria helped our experts avoid repetitive document analysis and deliver faster, more accurate results.”
Meet Lettria Perseus, our new model.
Lettria Perseus, where precision meets speed: 30% more accurate than any other LLMs on graph generation, schema-valid graphs under 20 ms. Build trustworthy graph-AI at enterprise scale.
Work with our experts to build your knowledge layer.
Lettria combines expert support and proven methods to accelerate results, reduce risk and unlock analyst-level intelligence.
Connect Your Data
→ Defining project needs, stakeholders, and success metrics
→ Collecting your relevant documents and sources
→ Parsing unstructured data and structuring it
→ Designing your first ontology and knowledge graph with our experts.
Activate Insights
→ Prototype development and testing
→ Feedback loops using evaluation matrix
→ Continuing enriching ontology, improving relationships in the graph
Monitor & Improve
→ Final iteration completed, preparing the system for deployment
→ Integration into your information systems, production of API docs
→ Final result: a verifiable, trustworthy AI
Deep expertise, distilled into actionable insights.
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Build trustworthy, domain-grounded intelligence
Improve RAG accuracy by 30% and let your documents deliver precise, explainable results.