Moon AI for the press.

From Normandy, Moon AI opens up the leading AI models, masking the sensitive data it detects first

Hosted in France at OVHcloud, the platform built by Stellarr Studio (Pont-Audemer, Eure) brings Claude, GPT, Gemini, Mistral and more than 100 models together in one interface. Its Moon Blur layer, on by default, masks the sensitive data it detects before sending to the model, then puts it back in the answer.

A contract, a pay slip, an IBAN, a patient’s or a client’s file: whatever you paste into an AI assistant goes to the model provider, often an American one. For a business, a school or a public body, that is the question holding back the use of AI. Stellarr Studio answers it with Moon AI: the power of the leading models on the market, a French layer that masks the sensitive data it detects, and a platform hosted in France by a French company.

Masked before they leave, restored in the answer. Moon Blur recognizes more than 150 types of data (IBANs, social security numbers, payment cards, emails, phone numbers, legal or medical data, technical secrets) and replaces them with placeholders before sending. The model works on masked text; the person reads a complete answer, and a panel shows what the model actually received. The studio is also upfront about the limits: masking is reversible, detection may be incomplete, and names of people are added as terms to mask.

The features of the big platforms, in one place. Auto mode picks the model, Agent mode works through the steps of a task, and you can create Word, PowerPoint, Excel and PDF documents, images, videos and music, use connectors (Gmail, Notion, Slack, GitHub, calendars), run routines and run code on an isolated computer. Moon AI works on the web, on iPhone and Android, on desktop with Moon Desktop (Windows, Mac, Linux) and in the terminal with Moon CLI. The Free plan needs no credit card; paid plans range from €9.90 to €249.90 per person per month, VAT included. Businesses, schools and public bodies get managed organizations: single sign-on, a SCIM directory, rules by group, and invoices paid by bank transfer or filed on Chorus Pro.

A story that began in Pont-Audemer. Turned down by the computer science programs he applied to, Fabien Marie, 23, taught himself by running game servers, then spent five years, from 2020 to 2024, training his own language model on his savings. He founded Stellarr Studio at the end of 2024; Moon AI opened to the public in July 2025 and came out in its official release on May 1, 2026. In 2025, the town of Pont-Audemer honored him at “La Jeunesse a du talent,” a local award for young talent.

About Stellarr Studio

Stellarr Studio SAS, whose contributions were valued at more than €1 million by a statutory contribution auditor, is a French artificial intelligence studio founded by Fabien Marie in Pont-Audemer (Eure). It publishes Moon AI, releases the Moon 6 model on Ollama and works with organizations on AI engineering, model training and fine-tuning, web and mobile apps, data architecture and security, and training workshops. The studio is supported by the CCI Seine Estuaire and the Normandy Region. Share capital: €1,163,435.