Lumo, Proton’s AI Assistant

Modified: 2025-11-12

Lumo combines Proton’s state‑of‑the‑art encryption with task‑specific AI models, delivering an assistant that can write, translate, analyse, and retrieve information securely. Whether you’re a professional protecting sensitive communications, a student needing quick document summaries, or anyone looking to save time in daily tasks, Lumo offers a robust, multilingual, and universally accessible solution.

Unlike many other assistants, this service doesn’t store or record any of our conversations. Even Proton itself cannot access the chat history, ensuring that all interactions remain fully safeguarded. Moreover, the content of our chats is never used for training purposes, guaranteeing that our discussions are treated with the utmost respect and privacy.

Content

Core Features

  1. End‑to‑end encrypted conversation

    • All interactions are protected by Proton’s zero‑access encryption, ensuring that even Proton cannot read the content.

  2. Specialized models

    • Lumo automatically routes requests to several internal models depending on the task — writing, translation, data analysis, web‑search, etc.—optimising relevance and speed.

  3. Multilingual support

    • Native handling of twelve languages (English, French, Spanish, German, Italian, Portuguese, Dutch, Russian, Chinese, Japanese, Korean, Polish). Language detection is automatic.

  4. Writing assistance

    • Text suggestions, re‑phrasings, style improvements, idea generation, email drafting, summarisation, and more, all with a tone that matches the user’s preferences.

  5. Integrated web search (Lumo Plus)

    • Access to up‑to‑date results via the built‑in web‑search feature, allowing retrieval of recent news, prices, statistics, etc.

  6. File handling

    • Secure upload of PDFs, plain‑text files, CSVs, code snippets, etc. Lumo can extract text, summarise, answer specific questions, or analyse the data contained.

  7. Cross‑platform integration

    • Available on the web and through iOS/Android mobile apps. History and settings sync seamlessly across devices.

  8. Productivity tools

    • Task lists, reminders, structured notes, table or simple script generation—all while remaining encrypted.

Technical Characteristics

ASPECT DETAILS Encryption Zero‑access, AES‑256, RSA‑4096 for session keys Base model Proprietary Proton model trained on diverse corpora, fine‑tuned per domain Usage limits Lumo Free: limited requests per day, no web search. Lumo Plus: unlimited usage, web search, advanced features. Compatibility iOS ≥ 15, Android ≥ 8, modern browsers (Chrome, Safari, Firefox) Languages 11 native languages, automatic detection, bidirectional translation API Available for Proton developers (via Proton API) – enables custom workflow integration.

Benefits for Users

  1. Maximum privacy

    • No third party, not even Proton, can access conversation content. Ideal for journalists, lawyers, researchers, or anyone concerned about privacy.

  2. Specialised responses

    • Dedicated models deliver more accurate answers than generic assistants, whether the query involves code, finance, law, health (educational context), etc.

  3. Boosted productivity

    • Instant drafting, summarising large documents, generating creative ideas—all in seconds, freeing time for higher‑value work.

  4. Current information (Lumo Plus)

    • Integrated web search ensures answers reflect the latest news, pricing, regulations, avoiding outdated data.

  5. Seamless experience across devices

    • Synchronized history with the same level of encryption on mobile and web, no data loss when switching devices.

  6. Easy integration

    • Proton APIs let you embed Lumo into internal tools (CRM, support platforms, office suites) while retaining the same security standards.

  7. Clear pricing

    • Lumo Free provides essential functions at no cost. Lumo Plus, €12.99 /month (or €9.99 /month with an annual plan), unlocks all advanced capabilities, including unlimited web search.