In this guide7 sections
Why look for a French alternative
The reasons come up again and again: knowing where your conversations are stored, signing with a company under French law, working with an interface and documentation in French, or no longer depending on a single vendor. Not every alternative answers the same reasons, and none of them does everything ChatGPT does.
One point to keep in mind: ChatGPT is both an app and a family of models, GPT. Leaving the app does not have to mean leaving the model. Some French alternatives replace GPT with another model; others keep it for you, next to other models, in a French app.
The three alternatives
Vibe, from Mistral AI: change the model
On May 28, 2026, Mistral AI renamed its assistant Le Chat to Vibe, keeping conversations, settings and the address. It is the most French option: both the company and the models are French. You do change models, though: you work with Mistral’s models, not GPT. According to its help center, data is hosted in the European Union by default. Free plan, then Pro at €17.99 a month, VAT included.
Moon AI: keep GPT, add the others
Moon AI is a platform built in Normandy by Stellarr Studio, a French company based in Pont-Audemer, and hosted in France at OVHcloud. It brings Claude, GPT, Gemini, Mistral and other models into one subscription: you keep GPT, you can pick another model for each message, or let Auto mode choose for you. Before your message reaches the model, Moon Blur masks the sensitive data it detects, then puts the real values back in the answer you read. Free plan with no credit card, then Lune at €9.90 per person per month, VAT included.
Mammouth: several models, no free plan
Mammouth, a company based in France, also brings together models from several makers, including GPT, Claude, Gemini and Mistral. It has no free plan; the Starter plan costs €12 a month, VAT included.
Side by side, criterion by criterion
| Criterion | ChatGPT Plus | Mistral Vibe (formerly Le Chat) | Mammouth | Moon AI |
|---|---|---|---|---|
| Company based in | United States (EEA entity in Ireland) | France | France | France (Stellarr Studio SAS) |
| Entry price | €23 a month, as shown on their pricing page | €17.99 a month, VAT included | €12 a month, VAT included | Free with no credit card, then €9.90 per person per month, VAT included (Lune) |
| Free plan | Yes | Yes, Free tier (up to 15 GB) | No | Yes, no credit card |
| AI models available | 7 entries, 1 provider (OpenAI) | Mistral family only (Medium 3.5, Small 4) | 9 text families, 8 image and video | More than 100 models from several providers |
| Data hosting | Outside the EEA, including the United States | EU providers prioritized (policy) | EEA, Google Cloud Platform | App and storage in France (OVHcloud); requests processed by the model provider |
| Reversible masking before sending | Not documented | Not documented | Not documented | Moon Blur, more than 150 categories |
| Mobile apps | Yes | Yes, iOS and Android | Yes | Native iOS and Android |
Prices checked on the official pages on November 13, 2026 (November 11, 2026 for Mammouth), for France, monthly with no commitment; other criteria checked on August 2, 2026 on the companies’ public pages, as in our detailed comparisons. If anything differs, the company’s own page prevails.
ChatGPT also has a Go plan at €8 a month (the amount shown, checked on November 6, 2026). For businesses, OpenAI has offered data residency in Europe since February 2025 for ChatGPT Enterprise, ChatGPT Edu and its API. The detailed comparisons are here: Moon AI vs ChatGPT Plus, Moon AI vs Mistral Vibe, Moon AI vs Mammouth.
What you give up when you leave ChatGPT
An alternative gives you access to models, not to the features of OpenAI’s own app. With Moon AI, as with Mammouth, you use GPT, not ChatGPT Plus: features reserved for OpenAI’s app are not included. With Vibe, you change models: a text, a piece of code or an analysis will not come out identical.
Your past conversations are not lost: Moon AI can import your ChatGPT data export, with the titles and dates of your conversations. And a French alternative does not make the model provider disappear: with Moon AI, your messages go to the provider of the model you pick, an American company if you pick GPT, after Moon Blur masking. Detection can miss a value written in an unusual way, names of people are not detected on their own (from Constellation, you add them to your list of terms to mask), and images and voice are sent as they are.
Which one to choose
- You want French AI end to end, model included: Vibe, from Mistral AI.
- You want to keep GPT and add Claude, Gemini and Mistral, in an app published and hosted in France that you can try with no credit card: Moon AI, from €9.90 a month, or free with a reduced usage limit.
- You are only comparing the price of a multi-model subscription: look at each plan’s usage limits too, they change everything.
To go further, our guide French AI: the options explains what is French about each service, and the Moon AI, French AI page details Moon AI’s case. Moon AI’s plans are on the pricing page.
Frequently asked questions
Does Mistral’s Le Chat still exist?
Yes, under another name: since May 28, 2026, Mistral AI’s assistant has been called Vibe. It kept the same address, and its users’ conversations and settings.
Moon AI vs Mistral VibeCan I use GPT without ChatGPT?
Yes. Platforms such as Moon AI or Mammouth give you OpenAI’s GPT models next to other models. You use the model, not the ChatGPT app or its own features.
Moon AI or ChatGPT PlusDoes a French alternative protect my data better?
Not automatically. Check where conversations are stored and where the model processes your messages. Moon AI hosts the app and storage in France, and Moon Blur masks the sensitive data it detects before sending; messages are still processed by the provider of the model you pick.
Hosting and sovereignty, the guideSources
- ChatGPT pricing (in French), OpenAI.
- Mistral rebrands LeChat as Vibe, The Decoder, May 28, 2026.
- Where do you store my data or my Organization’s data?, Mistral AI Help Center, updated August 12, 2026.
- Vibe pricing (in French), Mistral AI.
- Legal notice, Mammouth AI.
- Pricing, Mammouth AI.
- OpenAI launches data residency in Europe, TechCrunch, February 6, 2025.
Pages checked on November 13, 2026. Facts about Moon AI come from its public pages: Moon AI at a glance, Security, Pricing and the legal notice.
Further reading
Try Moon AI on a real task.
Claude, GPT, Gemini, Mistral and more than 100 models in one subscription. The Free plan needs no credit card.