Mistral AI is the French AI company. Its assistant, Le Chat, has been called Vibe since May 2026 and supports custom MCP connectors. Its open models, such as Mistral and Mixtral, can also run on your own hardware. Either way, Mailpro plugs in.
Mistral AI was founded in April 2023 in Paris. It offers an online assistant, Vibe (formerly Le Chat, still at the same address), in two versions: Vibe for Work and Vibe for Code.
Mistral also publishes open models: several of them, including Mistral 7B, Mixtral and Mistral Small, are under the Apache 2.0 license, which allows commercial use. You can install them in your company, without depending on an online service.
For a European company, it is a simple combination to explain to your data protection officer: the assistant comes from a European company, and the email marketing data is hosted in Switzerland at Mailpro.
| Developer | Mistral AI, Paris (France) |
|---|---|
| Assistant | Vibe (formerly Le Chat), since May 2026 |
| Feature name | Connectors › Custom MCP Connector |
| Sign-in | OAuth 2.1 with automatic registration; HTTPS server |
| Open models | Mistral 7B, Mixtral, Mistral Small: Apache 2.0 license |
Mistral writes naturally in French, German, Italian, Spanish and English: each list gets its own language.
In Vibe, each Mailpro tool can stay under manual approval, or be allowed once and for all.
Vibe for the marketing team, a Mistral model installed in-house for sensitive data.
A price list, a product sheet, meeting minutes: Mistral turns them into an email and prepares it in Mailpro.
In Vibe, open Connectors, click + Add Connector then the Custom MCP Connector tab.
Enter a name without spaces (“Mailpro”) and paste the server address shown in your Mailpro account, on the AI Assistants (MCP) page, then click Connect.
Vibe detects the OAuth sign-in and opens the Mailpro page: sign in and accept the permissions.
In Vibe, choose which tools stay under approval; in Mailpro, set how it sends and the daily cap.
Adding a custom connector is limited to the admin; on the Free, Pro and Student plans, the account holder is the admin. For a Mistral model running on your own hardware: see self-hosted AI.
Tutorials that mention Le Chat are still valid: it is the same assistant, at the same address, under a new name.
Vibe can ask for your approval before each tool call; Mailpro can ask for your approval before each send. You set both.
Mistral 7B, Mixtral and Mistral Small are under Apache 2.0; for other models, check the license before commercial use.
On the Mailpro side, the rules are the same for every assistant: by default, each send waits for your approval, or goes out directly within a daily cap; a log keeps track of everything, and one click suspends all sends. The details.
Yes: Le Chat was renamed Vibe in May 2026. MCP connectors are set up in the same place.
Yes, adding a custom connector is limited to the admin. On individual plans, the account holder is the admin by default.
Yes: installed on your own hardware with LM Studio, Open WebUI or LibreChat, it connects to Mailpro the same way.
All questions: AI assistants FAQ.
Create a free Mailpro account, connect your assistant from the AI Assistants page of your account, and stay in control of every send.
