Mistral Le Chat and GDPR / AI Act: the European alternative, with conditions

Overview and data processed

Mistral AI is a French generative AI company. Le Chat is its conversational assistant, available as a consumer version, Le Chat Enterprise and a developer offering (La Plateforme / API). Its main compliance advantage: European anchoring and hosting.

Le Chat processes the content of prompts and responses, account data and technical data. The professional offerings provide EU hosting, a DPA and no use of data for training by default. The free version may use conversations to improve the service: to be avoided for professional data.

Risks for your business

The risks are real but mitigated by the EU location: no issue of transfers outside the EU or CLOUD Act for offerings hosted in Europe. There remain leaks via prompts, use of the free version for professional data, and the company's responsibility for data entered.

Main GDPR risks:

• Free version: possible use of conversations, legal basis to be qualified.
• Data minimisation and legal basis for third-party data entered.
• Data subject rights and information.
• Processing: check the DPA and any sub-processors.

GDPR obligations

1. Use Le Chat Enterprise / La Plateforme with DPA and EU hosting for any professional use.
2. Prohibit the free version for professional data.
3. Record the use in the record of processing activities; carry out a DPIA if the risk is high.
4. Inform data subjects; frame uses.
5. Involve the DPO.

AI Act obligations

Mistral models are GPAI (provider obligations from 2 August 2025). The AI Act applies regardless of the editor's country: being European does not exempt from transparency obligations (Article 50), human oversight and AI literacy. A decision-making use can shift the system to 'high risk' (Annex III). See the AI Act guide.

Cybersecurity and best practice

Cyber risks: leaks via prompts, prompt injection, shadow AI via the free version. To be integrated for NIS 2 entities.

Best practice: favour Le Chat for its sovereign anchoring, but via the professional offering with DPA; confirm EU hosting and no training on your data; no sensitive data, pseudonymisation; AI charter, training, AI officer, register.

Compliance checklist:

• Professional offering (Le Chat Enterprise / La Plateforme) with signed DPA
• EU hosting confirmed
• Free version blocked for professional use
• Use in register, DPIA if high risk
• Art. 50 transparency, teams trained, DPO involved

Sanctions, conclusion and recommendations

Sanctions (two cumulative regimes): GDPR up to €20m or 4% of annual worldwide turnover; AI Act up to €35m or 7% for prohibited practices, and €15m or 3% for most other infringements (including GPAI provider obligations). Sovereignty reduces transfer risk, not the user company's GDPR/AI Act liability.

Recommendation: Le Chat is our preferred recommendation when data sovereignty is paramount: EU hosting and absence of CLOUD Act are decisive advantages over US solutions. But compliance is not just about the flag: professional offering + DPA, internal governance and AI Act compliance remain essential. Compare with other assistants: ChatGPT, Claude, DeepSeek.