Knowledge Studio
Knowledge Studio Overview ->
SOLUTIONS
Ontology Enrichment

Build your ontology from your data.

Text to Graph Pipeline

Build a GraphDB using raw text.

Private GPT

Build and fine-tune your own GPT chatbot.

GraphRAG

The best of graph and vector combined.

USE CASES
Logo AP-HP
AP-HP

See how AP-HP uses knowledge graphs to structure patient data with Lettria's help.

Logo Leroy Merlin
Leroy Merlin

See how Leroy Merlin used Lettria to improve product recommendation.

NLP Studio
NLP Studio Overview ->
SOLUTIONS
Text Mining API

Extract useful insights from raw text data.

Text Classification API

Classify raw text data using your ontology.

Prompt Engineering

Next-gen prompt engineering for your SaaS.

USE CASES
NLP for Verbatim Analysis

See how Lettria's Text Mining API can be used to supercharge verbatim analysis tools.

NLP for Speech Analysis

See how Lettria's Text Classification API can help make quality monitoring tools more robust.

NLP for CRM Enrichment

Explore how the Text Classification API can make CRM Enrichment tools more accurate.

Platform
Product
Document Parsing
Ontology Enrichment
Our team
Text to Graph
GraphRAG
Industries
Healthcare
Our team
Finance
Legal
Engineering
Capabilities
Knowledge Studio
Security
Case studies
Resources
Ressources
Blog
Lettria Lab
API Documentation
GitHub (SDK)
Ontology Benchmark
Text to Graph Benchmark
Benchmarks
Ontology Benchmark
Text to Graph Benchmark
Benchmarks
Lettria Perseus
Contact
Languages
English
Get a demoLogin

Terms of service

Introduction

‍

The website of Lettria, available at the address https://www.lettria.com, is edited and operated by TURFU SAS, a Simplified Joint Stock Company (SAS) with a capital of 5 000€.

‍

TURFU SAS is registered in the Trade and Companies Register of Melun under the number 891 452 997, whose headquarters are located at 46, Rue du Val, 77160 Provins.

‍

You can contact us :

  • By email: hello@lettria.com
  • By mail: 30, Rue de Palestro, 75002 Paris

‍

Legal information

‍

  • Intracommunity VAT number: FR54835074857
  • Director of the publication: Charles Borderie
  • The lettria.com website and its services are hosted in ‍by Webflow, Inc.,398 11th Street, 2nd Floor. San Francisco, CA 94103 (mail : contact@webflow.com). Built in Webflow by Justa.

‍

Favicon de Lettria

Transparent, verifiable AI

Product
Document ParsingOntology EnrichmentText to Graph PipelineGraphRAGSolutions Overview
‍
Industries & Use Cases
FinanceLegalHealthcareEngineeringVerbatim Analysis SoftwareSpeech Analysis SoftwarePrivate ChatGPT
Resources
BlogLettria LabGitHub (SDK)Benchmark Ontology ToolkitBenchmark Sentiment AnalysisBenchmark Text to GraphGlossary
Contact
ContactTalk To An ExpertTeam
Company
TeamSecurityOur approach
© 2025 Lettria
Cookie policyPrivacy policyTerms of service
Logo Linkedin
Logo Youtube