Proton’s Lumo AI Chatbot Gets a Major Privacy Upgrade: Here’s What’s New
Proton, the company behind Proton Mail, VPN, and Drive, has announced a significant update to its privacy-focused AI assistant, Lumo. The upgrade, published on June 30, 2026, brings end-to-end encryption to all chats and introduces a zero-logs policy. For anyone who has hesitated to use AI assistants because of data privacy concerns, this update is worth a closer look.
What happened
Lumo first launched in July 2025 as a privacy-first alternative to chatbots like ChatGPT and Microsoft Copilot. At launch, it already encrypted conversations in transit and at rest on Proton’s servers. The new version, sometimes referred to as Lumo 2.0, goes further by encrypting every chat end‑to‑end. That means Proton itself cannot read your conversations. The company also states that it keeps no logs of user interactions — no records of what was asked, when, or from which account.
As TechCrunch reported in their article “Lumo, Proton’s privacy-focused AI chatbot, gets an upgrade,” the update also includes improved response speeds and support for longer, more complex queries. While the underlying model details are not fully public, Proton says the assistant now handles multi-turn conversations more coherently without sacrificing the privacy guarantees.
Why it matters
Most mainstream AI chatbots collect vast amounts of conversational data for training and improvement. Even when companies claim to anonymize data, the privacy guarantees are often opaque. Lumo’s approach is different: end-to-end encryption ensures that only you and the AI have access to the content of your chats — and the AI, being a model, does not store or learn from your specific queries.
For anyone using AI for sensitive tasks — drafting confidential emails, discussing health concerns, or brainstorming business strategies — this matters. You can ask questions without worrying that the conversation will be saved, analyzed, or leaked. Proton’s track record with encrypted services (Mail, Calendar, Drive) adds credibility; the company is audited and has published transparency reports.
Compared to ChatGPT (which logs conversations by default unless you opt out in settings) or Copilot (which ties into Microsoft’s broader data ecosystem), Lumo offers a genuinely private alternative. The tradeoff is that Lumo may have a narrower knowledge base and fewer integrations — but for privacy-conscious users, that is a reasonable compromise.
What readers can do
If you already have a Proton account (free or paid), you can access Lumo through the Proton web apps or the mobile apps for Android and iOS. No separate sign-up is needed. The assistant is available as a chat interface within your Proton dashboard, much like how you would use ChatGPT on the web.
To get started:
- Log in to your Proton account on the web or open the Proton app.
- Look for the Lumo icon (a small chat bubble with a lock) in the sidebar or toolbar.
- Click or tap it, and you can begin asking questions.
Free accounts have a limited number of queries per day; paid Proton Unlimited or Business plans get higher usage caps. The company plans to introduce a dedicated Lumo app later this year.
For the strongest privacy, make sure your Proton account uses two-factor authentication (Proton Pass or a hardware key), and avoid sharing personally identifiable information in any AI chat — even encrypted ones.
Sources
- TechCrunch: “Lumo, Proton’s privacy-focused AI chatbot, gets an upgrade” (June 30, 2026)
- TechCrunch: “Proton’s new privacy-first AI assistant encrypts all chats, keeps no logs” (July 23, 2025) — background on the original launch
- Proton official blog and support pages (accessed June 30, 2026)