Proton Launches AI Assistant That Collects No Personal Data

Swiss privacy-focused tech company Proton announced the launch of “Lumo” on July 23, 2025—an AI assistant that, unlike most of its competitors, collects no personal data. “It delivers all the benefits of AI without compromising your privacy or data security,” the company said in its press release.

Proton guarantees that it will not log user queries or Lumo’s responses. No third parties will be granted access to conversations, which will also not be used to build advertising profiles. The company has published Lumo’s source code, which relies on several open-source models. In the long run, Proton plans to develop its own AI models.

Andy Yen, Proton’s co-founder and CEO, explained that Lumo’s servers have been deployed in Germany and Norway, citing concerns over possible surveillance legislation in Switzerland. The Swiss government is currently considering a “conversation surveillance law” that could compel tech firms to spy on users on behalf of state agencies.

To shield Lumo from such legislation, Proton has opted to host the assistant outside of Switzerland as a precaution.