Lettria
AI platform for extracting knowledge from complex documents with verifiable accuracy.
Pricing
About Lettria
Lettria is an AI platform designed for document intelligence and unstructured text structuring in regulated industries. It combines document parsing, ontology building, text-to-graph conversion, and GraphRAG capabilities to extract reliable, traceable insights from complex technical documents. The platform helps organizations in healthcare, finance, legal, and engineering sectors turn textual data into queryable knowledge graphs with full source attribution and reduced hallucinations. A key limitation is that the platform requires initial setup and domain expertise to define ontologies effectively, making implementation somewhat involved for users without prior knowledge graph experience.
At a glance
- Company
- Lettria
- Platforms
- Web, API
- API
- Available
- Integrations
- Neo4j, Qdrant
- Last verified
- June 2026
Who It's For
- •Healthcare and pharmaceutical organizations managing clinical data
- •Financial institutions processing regulatory documents
- •Legal teams handling complex compliance documentation
- •Engineering firms extracting insights from technical documents
- •Research institutions conducting biomedical knowledge extraction
- •Enterprise teams requiring traceable, explainable AI outputs
How It Works
- 1Document Parsing: Extracts tables, diagrams, reading order, and multi-column layouts from complex PDFs
- 2Ontology Building: Automatically generates clean, domain-specific ontologies directly from documents without manual mapping
- 3Text to Graph: Converts unstructured text into rich knowledge graphs with entities, relations, and constraints
- 4GraphRAG: Combines graph retrieval with reasoning to deliver transparent, interpretable outputs without hallucinations
- 5Fine-tuned extraction models ensure high accuracy for regulated industries with proprietary models
How to Use Lettria
- 1Connect your data sources (PDFs, SQL databases, or APIs) to the platform
- 2Define project needs, stakeholders, and success metrics with Lettria experts
- 3Parse unstructured data and design your first ontology and knowledge graph
- 4Prototype and test the system with feedback loops using evaluation matrices
- 5Deploy into your information systems with generated API documentation
Key Features
- •Document Parsing with table and diagram extraction
- •Auto-Ontology Building from raw text without manual rebuilds
- •Text to Graph conversion for knowledge graph generation
- •GraphRAG for transparent reasoning and retrieval
- •Fine-tuned proprietary extraction models
- •Full source traceability and auditability
- •Multi-source data unification (PDFs, databases, APIs)
- •Version control for schemas and ontologies
- •No-code collaborative framework
Use Cases
- •Evidence-based research in healthcare with full traceability for clinical trials and publications
- •Biomedical knowledge extraction at scale for research institutions
- •Document analysis for regulated industries requiring audit trails and compliance
- •Ontology enrichment and automated classification at scale
- •GraphRAG workflows for complex document understanding without hallucinations
Pros & Cons
Advantages
- •30% accuracy improvement through GraphRAG compared to standard LLM approaches
- •Full source traceability and auditability prevents hallucinations critical for regulated industries
- •Automatic ontology generation eliminates manual mapping burden
- •Pre-built domain expertise for healthcare, finance, legal, and engineering verticals
Disadvantages
- •Requires collaborative setup process and domain expertise to define effective ontologies
- •Implementation typically takes 12 weeks for production deployment
- •Primarily targets regulated industries, which narrows general-purpose applicability
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Frequently Asked Questions
What is Lettria?
Lettria is an AI platform designed for document intelligence and unstructured text structuring in regulated industries. It combines document parsing, ontology building, text-to-graph conversion, and GraphRAG capabilities to extract reliable, traceable insights from complex technical documents.
How much does Lettria cost?
Lettria uses custom pricing — contact the vendor for a quote. A free trial is available.
Is Lettria free?
Lettria is a paid tool, but it offers a free trial.
What are the best Lettria alternatives?
Popular Lettria alternatives include Spellbook Legal, Legal Robot, BetterLegal Assistant.
What is Lettria used for?
Lettria is commonly used for Evidence-based research in healthcare with full traceability for clinical trials and publications, Biomedical knowledge extraction at scale for research institutions, Document analysis for regulated industries requiring audit trails and compliance.
Does Lettria have an API?
Yes, Lettria offers an API for developers.
What platforms does Lettria support?
Lettria is available on Web, API.
Information Accuracy
Please note: While we regularly update all tool information including descriptions, features, pricing, and other details, this information may change over time as tools evolve and update their offerings. For the most current and accurate information, we recommend visiting the official website directly. Our goal is to provide you with comprehensive and up-to-date information to help you make informed decisions.