Unlock a New Era of Private, Intelligent Conversations with Lumo
In today’s hyper‑connected world, privacy and productivity often feel at odds. You want a digital assistant that can keep up with your ideas, answer your questions, and protect your data—all without compromising speed or convenience. Lumo, Proton’s AI‑powered conversational companion, delivers exactly that. Launched in July 2025, Lumo blends cutting‑edge large‑language‑model technology with Proton’s renowned zero‑access encryption, giving you a secure, intelligent partner that works across all your devices.
Why Lumo Stands Out: End‑to‑End Encryption for Every Interaction
Unlike many mainstream assistants that harvest data to improve ad targeting, Lumo operates under Proton’s strict privacy‑first philosophy. All messages, files, and context are encrypted on your device before they ever leave it, and Proton’s servers never have the keys to decrypt them. This means you can discuss sensitive topics—financial planning, health concerns, or confidential work matters—confident that no third party can read your conversations.
Seamless Multi‑Platform Availability
Whether you’re on a smartphone, tablet, laptop, or desktop browser, Lumo is ready. The iOS and Android apps (available via the Apple App Store and Google Play Store) provide native voice entry, push notifications, and quick‑access widgets, while the web app mirrors the full feature set in any modern browser. Your conversation history syncs securely across devices, so you can pick up where you left off without re‑typing or losing context.
Intelligent, Context‑Aware Assistance
Lumo isn’t just a static chatbot; it routes each request to the most suitable specialized model. Need a quick weather update? Lumo calls the real‑time weather service. Want the latest cryptocurrency price? It fetches live market data. For more nuanced tasks—drafting a proposal, brainstorming ideas, or translating text—Lumo engages its advanced generative model, delivering coherent, high‑quality output while preserving your privacy.
Built‑In Web Search for Up‑To‑Date Information
While Lumo’s core knowledge base covers everything up to April 2024, the platform integrates Proton’s Web Search capability (enabled by default). When you ask about recent events, software releases, or trending topics, Lumo instantly performs a secure search, cites reliable sources, and incorporates the freshest data into its response. This ensures you never have to juggle multiple tabs or worry about outdated answers.
Yes – Lumo Has a Fully Functional Free Tier
Proton offers Lumo Free, which you can start using right away at no cost. Here’s what you get with the free plan and what you’ll need to upgrade if you want additional capabilities:
| Feature | Lumo Free | Lumo Plus (Paid) |
|---|---|---|
| Core conversational AI | ✅ Basic model with strong privacy guarantees | ✅ Access to the latest, most capable model |
| End‑to‑end encryption | ✅ All chats are encrypted on‑device | ✅ Same level of encryption |
| File uploads (PDF, CSV, code, etc.) | ✅ Limited size (up to ~5 MB per file) and a modest number of analyses per month | ✅ Larger file limits and unlimited analyses |
| Web Search | ✅ Enabled, but with lower daily quota | ✅ Higher quota and priority results |
| Conversation history sync | ✅ Across your logged‑in devices | ✅ Unlimited synced history |
| Voice entry (mobile apps) | ✅ Available | ✅ Same |
| Priority support | ❌ Community‑based help | ✅ Dedicated support channel |
| Unlimited usage | ❌ Daily usage caps (e.g., a few hundred messages) | ✅ No caps |
| Advanced tools (bulk data analysis, multi‑turn memory, custom prompts) | ❌ Not available | ✅ Included |
Customizable Experience with Lumo Plus
For power users, Lumo Plus unlocks unlimited usage, priority access to the newest model upgrades, and expanded web‑search quotas. Priced at $12.99 / month (or $9.99 / month on an annual plan), Lumo Plus also includes advanced features such as bulk file analysis, multi‑turn conversation memory, and priority support. Existing Proton Visionary or Lifetime subscribers receive Lumo Plus automatically, making it a seamless addition to any Proton ecosystem.
Secure File Handling and Collaboration
Need to review a CSV dataset, extract insights from a PDF, or get code explanations? Upload the file directly within the chat, and Lumo will acknowledge the content, outline its capabilities, and ask which specific task you’d like to perform. All file transfers are end‑to‑end encrypted, and Lumo never stores the raw file beyond the session needed to process your request.
Integration with the Wider Proton Suite
Lumo acts as a hub for all Proton services. From within the chat, you can launch Proton Mail to draft encrypted emails, open Proton Drive to attach files, or activate Proton VPN for an extra layer of network protection—all without leaving the conversation. This tight integration streamlines workflows, reduces context switching, and reinforces the security posture of your entire digital life.
How to Get Started with Lumo
- Download the App – Visit the official download page at https://lumo.proton.me/download and select the iOS or Android version for your device.
- Sign In with Your Proton Account – Use your existing Proton credentials (or create a free Proton account if you don’t have one).
- Choose Your Plan – Start with the free tier to explore basic features, then upgrade to Lumo Plus for unlimited access and premium tools.
- Enable Web Search (Optional) – The toggle is on by default; you can turn it off anytime in Settings if you prefer a strictly offline experience.
- Start Conversing – Simply type or speak your query. Lumo will respond, ask clarifying questions if needed, and offer actionable next steps.
The Bottom Line: Privacy Meets Performance
Lumo proves that you don’t have to sacrifice privacy for convenience. By marrying Proton’s battle‑tested encryption with state‑of‑the‑art AI, Lumo offers a trustworthy, versatile assistant that respects your data while delivering the speed and intelligence you expect from modern digital helpers. Whether you’re a busy professional, a student juggling research, or anyone who values secure communication, Lumo empowers you to get more done—confidently and efficiently.
Ready to Experience Lumo?
Visit the download page, install the app, and start exploring the future of private AI assistance today. With Lumo, your conversations stay yours, your data stays protected, and your productivity reaches new heights.