Proton Lumo 2.0: The Private Alternative to ChatGPT

Lumo 2.0: A Secure Alternative to ChatGPT by Proton

Proton, the Swiss company renowned for its secure services like ProtonMail and ProtonVPN, has recently unveiled Lumo 2.0. This version marks a significant advancement for its privacy-focused chatbot, representing what the company describes as the most substantial change since the initial launch of Lumo. Designed to compete with popular AI models such as OpenAI's ChatGPT and Anthropic's Claude, Lumo stands out for its commitment to user security and privacy.

Lumo was initially launched in 2025, and since then, it has attracted over 10 million users thanks to its open-source approach. This chatbot is capable of performing a variety of tasks, ranging from answering user queries to generating content, all while placing a particular emphasis on data protection, an aspect often overlooked by other AI models.

What's New in Lumo 2.0

Proton has introduced several notable improvements in Lumo 2.0. According to the company, the chatbot has recorded a 127% improvement on the Artificial Analysis Intelligence Index, a metric that evaluates AI capabilities across ten criteria, including speed, reasoning, and knowledge. This progress reflects Proton's commitment to providing an increasingly powerful tool.

Among the new features, two new response modes have been introduced. The "quick mode" allows for rapid responses to generic questions, while the "reasoning mode" offers more detailed answers that require complex reasoning. Additionally, Lumo 2.0 can now process both text and images simultaneously, applying the same encryption standards to both types of content.

Proton has also optimized Lumo's web search functionality. Users can now access real-time results and view citations, reducing the risk of errors. The model is continuously updated with the latest news, events, financial information, and weather updates, ensuring accurate and comprehensive responses.

Another notable improvement is the contextual memory function. Users can choose how much information to retain, enhancing the quality of future interactions, particularly for managing documents and data. This feature is especially appreciated by professional users who need to retain information for complex work tasks.

Finally, Lumo 2.0 offers secure workspaces for storing conversations and files, as well as the ability to create personalized personas, allowing Lumo to adapt to individual user preferences. For example, you can configure Lumo to act as a personal trainer, a teacher, or an assistant, depending on your specific needs.

Privacy Protection with Lumo 2.0

Lumo 2.0 has been completely redesigned to operate on Proton's European infrastructure, ensuring that user data remains protected by strict privacy laws. Based in Geneva, Proton benefits from Swiss laws, which are among the most rigorous in the world and often stricter than the EU's GDPR.

Proton employs zero-access encryption, meaning messages are end-to-end encrypted. Once a response is generated, it is stored locally and accessible only by the user. Therefore, Proton cannot read or use this data.

The Ghost mode is another security feature, allowing users to ensure that their discussions disappear after the conversations end. Proton does not keep logs or share user information, thus ensuring total confidentiality.

Accessing Lumo 2.0

Lumo 2.0 is freely accessible to everyone. Simply create an account to get started, with no subscription required. However, for those who wish to use it more intensively, Proton offers paid subscriptions.

Lumo Plus, at $9.99 per month, provides unlimited chats, history, advanced web search, and more. For professional use, Lumo Professional, starting at $11.99 per month, includes secure collaboration tools and other advanced features.