Lumo

Lumo is an AI chatbot from Proton, the Swiss company known for its privacy products. It uses zero-access encryption, so chat history can only be read on your own devices, and it follows a no-logs policy. Lumo runs on open source language models that Proton tunes and picks per request. By default it does not search the web, deletes chats when you close them, and stores nothing on the server.

The infrastructure behind Lumo sits in Europe, which keeps sensitive prompts away from countries with weaker data protection. The Android and iOS apps are open source, and you can delete your data at any time. A solid European alternative for anyone who wants an assistant that does not monetise conversations.

Pricing

The free plan covers basic use with a limited number of chats. Plus costs 12.99 euro per month, or 9.99 euro per month on an annual plan, and adds unlimited chats, longer encrypted history and large file uploads.