Last year we launched Lumo, a zero-access encrypted AI assistant that never logs your conversations or trains on your data. Since then, more than 10 million people have started using it, and we’ve shipped major updates, including custom conversation styles, dedicated encrypted project spaces, more powerful models, and more.
Today we’re announcing Lumo 2.0, the most significant change since launch. We’ve rebuilt Lumo on a new architecture with capabilities that bring it to the frontier of what AI can do. As always, it runs on Proton’s fully European infrastructure, protected by Swiss privacy laws and zero-access encryption.
Advanced reasoning models
Lumo 2.0 is our biggest leap in capability yet. On the Artificial Analysis Intelligence Index(nova janela), an independent benchmark combining 10 evaluations across agents, coding, scientific reasoning, and general knowledge, Lumo 2.0 Lite scores 127% higher than Lumo 1.4, and Lumo 2.0 Max scores 240% higher.
Lumo 2.0 also introduces fast and reasoning modes to make everyday interactions feel faster while giving more demanding tasks additional depth. Fast prioritizes speed and Thinking is optimized for more complex, multi-step reasoning — a capability that didn’t exist in Lumo 1.4.
Lumo 2.0 responds to everyday queries up to 76% faster than Lumo 1.4. More complex tasks requiring deeper thinking now benefit from a visible thinking state, letting you see how Lumo is working through the problem in real time.
Image recognition and generation
Lumo 2.0 is now multimodal, able to process both text and images. Upload an image to analyze, create visuals from a prompt or a rough sketch, or edit existing images, all in the same conversation.
Lumo’s zero-access encryption applies to image processing too. Images you upload and the images Lumo generates are stored so that no one, not even Proton, can access them.
Image generation
Describe what you want and Lumo creates it. Type a prompt, refine it in the same conversation, and iterate until it looks exactly right. From a logo concept to a travel poster, start with words and end with an image.
Image editing
Upload an image and tell Lumo what to change. Swap backgrounds, adjust colors, remove unwanted objects, or completely re-imagine a scene.
Image analysis
Upload a chart, a document, a screenshot, or a photo and ask Lumo anything about it. Lumo identifies what’s in the image, reads the data, and responds with detail.
Sketch to image
Upload a rough sketch and describe what you want it to become. Tell Lumo the style, the mood, the details, and watch it take shape.
Powerful new web search capabilities
Compared to Lumo 1.4, Lumo 2.0 has far stronger web search. When a question calls for current information, Lumo pulls live results from across the web and cites its sources, so you can verify answers and dig deeper. It stays current on recent news and events, draws on live financial data, and can even pull in weather forecasts. The result is more accurate, more complete answers with fewer hallucinations.
Deeper context with memories
Lumo 2.0 combines user-controlled memory and Projects to move beyond one-off questions toward collaboration that builds over time.
Memory lets Lumo learn your preferences, working style, and ongoing context, so every conversation starts smarter than the last. You decide what it retains, what it forgets, and what it never learns in the first place.
The context window is now twice as large, so Lumo holds longer conversations coherently and reasons across longer documents and bigger datasets. For work that spans multiple sessions, Projects go further: Each is a dedicated encrypted workspace that keeps your chats, files, and instructions together.
Every piece of context is protected by zero-access encryption, the same architecture that secures over 100 million Proton Mail and Proton Drive users.
Custom Lumos
Lumo 2.0 also introduces Custom Lumos, purpose-built assistants tailored to specific tasks. Build a writing assistant that always drafts in your tone, or a research assistant that structures answers the way you need them. You define the instructions once, and the Custom Lumo follows them every time, no re-explaining required.
Private AI for businesses
Most AI tools create a new category of risk for businesses. Employee queries become training data. Confidential documents can be compromised. And your data sits on infrastructure subject to US law — with recent events already showing how fast access can vanish for international users.
Lumo for Business is built for organizations that can’t afford those risks. Every conversation is zero-access encrypted, never logged, and never used to train future models. Administrative tools let you manage your team’s access, and your data stays on independent European infrastructure, meaning access to Lumo cannot be subject to US Executive Orders and user data is not subject to American data collection requests.
Intelligence without surveillance
With Lumo 2.0, you no longer have to choose between advanced AI and privacy.
People now share more with AI systems than they ever shared with any other technology, and the dominant providers are normalizing a future where your personal data is the price of participation. Conversations are getting mined for training. Behavior is being used as a signal for profiling. Ads are arriving inside the most popular assistants. And control over all of it is now concentrated in the hands of a few US tech companies (many with government and defense contracts) with increasing commercial pressure to monetize your attention.
We believe AI should empower people, not extract from them. As it becomes infrastructure for work, creativity, and communication, privacy can no longer be optional. Lumo brings Proton’s privacy standards to AI: zero-access encryption, no logs, no data sharing, and no training on your conversations. And because Lumo is fully open source, anyone can inspect the code, verify the encryption, and confirm it works exactly as we say.
Lumo 2.0 is live now
- Free: Sign up(nova janela) for private AI with core capabilities.
- Lumo Plus: Unlimited chats, Projects, advanced image generation, and priority access to the fastest models.
- Lumo Professional: Premium features for teams, enabling secure collaboration without data leak risks.
We are shaping a future where AI works for you. Share your thoughts on X(nova janela) and Reddit(nova janela).
