Introducing Lumo: Proton's Revolutionary Privacy-Focused AI Chatbot

TL;DR

Proton has launched Lumo, a privacy-first AI chatbot designed to safeguard user data while delivering informative responses. Lumo offers two user modes, emphasizes data privacy, and ensures no conversation logs are stored on its servers. This launch addresses growing concerns about data privacy in AI interactions.

Introduction

Proton, renowned for its privacy-focused services, has announced the launch of Lumo, a groundbreaking AI chatbot prioritizing user privacy. This introduction marks a significant step towards ensuring secure and private interactions with AI tools.

Key Features of Lumo

User Modes

Lumo offers two distinct user modes:

1. Web Search Mode: Users can enable web search capabilities by clicking the “Web search” button before submitting a prompt.
2. Offline Mode: Without the web search enabled, Lumo operates solely on its pre-trained data, ensuring no real-time web browsing or data access.

Data Privacy

Lumo’s design emphasizes data privacy:

• No Conversation Logs: Unlike other AI services, Lumo does not store conversation logs on its servers. All chat data is encrypted and stored locally on the user’s device.
• Curated Training Data: Lumo’s knowledge base is derived from a curated set of sources up to October 2023, reducing the risk of hallucinations and ensuring high-quality responses.

Privacy Concerns Addressed

Sensitive Information Sharing

Proton highlights the risk of sensitive information sharing through AI tools. Traditional AI interactions often involve unintentional sharing of personal or confidential data, which can be used for training AI models or accessed by third parties.

Company Secrets and Data Leaks

There have been instances where company secrets were inadvertently shared with AI tools, raising concerns about data misuse. Similarly, platforms like Meta AI have faced issues with public chat leaks, emphasizing the need for enhanced privacy measures ¹.

Lumo’s Approach to Privacy

No Data Exploitation

Lumo ensures that user conversations are not used to train the AI or for any commercial purposes. This approach mitigates the risk of personal data being exploited for profit or exposed in data breaches.

Transparent Training Data

Lumo’s training data is sourced from a diverse range of publicly available texts, including books, articles, and websites. This curated dataset ensures the AI provides accurate and relevant responses without compromising user privacy.

User Experience

Initial Impressions

Early users have appreciated Lumo’s commitment to privacy. The only notable limitation is the lack of support for direct image uploads or processing. Overall, Lumo offers a secure and private AI interaction experience.

Future Potential

As the demand for privacy-focused AI tools grows, Lumo stands out as a pioneering solution. Its unique approach to data handling and user privacy sets a new standard in the AI industry.

Conclusion

The launch of Lumo underscores Proton’s commitment to user privacy and security. By addressing the critical issues of data privacy and sensitive information sharing, Lumo offers a reliable and secure AI chatbot experience. As AI continues to evolve, tools like Lumo will play a crucial role in safeguarding user data and ensuring ethical AI interactions.

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References

1. Malwarebytes (2025). “Your Meta AI chats might be public and it’s not a bug”. Malwarebytes Blog. Retrieved 2025-07-23. ↩︎