We need and use alternatives to ChatGPT and Anthropic (BigTech models) in Europe, which is why I suggest integrating Mistral-Vibe with TheBrain.
https://mistral.ai/products/vibe/
The French product Mistral-Vibe is GDPR-compliant and offers a wide range of user features even in the free version (custom agents, reminder function, connectors, libraries, etc.) for organizing projects in Mistral. This approach seems to align very well with TheBrain.
It is likely slightly inferior to ChatGPT and Anthropic in terms of model performance. However, for the average user, the functionality is more than sufficient and satisfying, and it is one of the fastest AI chat programs at the moment.
I would suggest the additional integration of the free version of the Mistral-Vibe AI Chat-Software
(Brain user since Personalbrain 2.0)