Lumo 2.0: Proton's Private Chatbot Offers a ChatGPT Alternative With New Capabilities

On June 30, 2026, Proton released Lumo 2.0, a private AI chatbot with expanded capabilities, positioned as a confidential alternative to ChatGPT.

What Lumo is and why it exists

Lumo is an AI chatbot from Proton, a Swiss company whose reputation rests on privacy-focused services: ProtonMail, ProtonVPN, ProtonDrive and ProtonCalendar. One philosophy runs through all Proton products: encryption by default and minimal data collection. Lumo continues that line, extending the principles of confidentiality to AI.

Unlike ChatGPT, Gemini or Claude, which operate within the ecosystems of American corporations, Lumo is designed with privacy by design: Proton says it does not use users' conversations to train models and does not pass them to third parties. The company is based in Geneva and operates under Swiss privacy law, one of the strictest in the world.

Lumo's audience is professionals who handle sensitive data: lawyers, doctors, journalists, financial analysts and corporate teams in regulated industries. For them, the question is not how smart the AI assistant is, but where their queries end up.

What has changed in Lumo 2.0

According to TechCrunch, Lumo 2.0 offers users a "broader set of capabilities" than the first version. The company had not disclosed specific features at the time of publication; a detailed announcement is expected with the official release of the update.

The first version of Lumo launched as part of the Proton ecosystem and was integrated with the company's other private services. Lumo 2.0 stays on that course, adding capabilities that make the assistant a more versatile tool. That fits Proton's style: the company prefers gradual launches without excessive marketing, with details revealed as the product becomes ready.

Why private AI assistants are in growing demand

Most leading AI assistants monetize or use conversation data in one form or another. Even when a company says it does not sell data, conversations pass through servers under US jurisdiction, which means they can be requested by court order or under national security legislation.

The European market is particularly sensitive to this problem. GDPR requirements have made companies stricter about which AI services they allow near internal information. Proton, with its Geneva base and reputation as a confidential provider, is well placed to serve this segment.

Competition in the AI assistant market is also intensifying: OpenAI, Google, Anthropic and xAI keep boosting the capabilities of their flagship models. For niche players like Lumo, the lasting differentiator is not model power but confidentiality guarantees that the big players cannot offer, for architectural and business reasons.

"Privacy is not a feature, it is a right," is the position

Proton built into all of its products.

What this means

Lumo 2.0 signals that Proton continues to invest in the AI niche rather than cede it to Big Tech. As regulatory pressure on data in AI services grows and users pay closer attention to where their conversations go, private AI assistants may move from a niche product to a full-fledged market alternative.

How does Lumo differ from ChatGPT?

Proton's Lumo is built on a philosophy of confidentiality: all messages are encrypted by default, and the company collects minimal data about users, unlike ChatGPT, Gemini and Claude, which are integrated into ecosystems of corporate data collection.