What is Lumo?

Lumo serves as a privacy-centered AI assistant that leverages generative AI's potential while prioritizing the confidentiality of your discussions. Developed by the privacy experts behind Proton Mail and VPN, Lumo ensures that conversations remain confidential, with no logs kept on its servers and all stored interactions protected by zero-access encryption, which prevents even Proton from accessing them. Boasting an open-source architecture, this service offers transparency and verification, enabling users to interact with it freely and securely. You can discuss a wide range of subjects with Lumo, from summarizing documents and rewriting emails to aiding in coding, translating text, brainstorming ideas, and more, all while maintaining peace of mind that your data won't be utilized for model training or shared externally. The platform secures conversations through end-to-end encryption, and, if you activate the AI’s web search feature, it relies on privacy-focused search engines. Lumo is easily accessible without requiring registration and is available on both web and mobile platforms, offering users a choice between free and premium plans. Its strong emphasis on safeguarding user privacy makes Lumo an appealing option for those who prioritize the security of their personal information when engaging with AI technology. Additionally, Lumo continually updates its features to enhance user experience and maintain the highest standards of privacy.

Pricing

Price Starts At:
€9.99 per month
Free Version:
Free Version available.

Integrations

No integrations listed.

Screenshots and Video

Lumo Screenshot 1

Company Facts

Company Name:
Proton AG
Date Founded:
2014
Company Location:
Switzerland
Company Website:
lumo.proton.me/

Product Details

Deployment
SaaS
iPhone
iPad
Android
Training Options
Documentation Hub
On-Site Training
Support
Standard Support
Web-Based Support

Product Details

Target Company Sizes
Individual
1-10
11-50
51-200
201-500
501-1000
1001-5000
5001-10000
10001+
Target Organization Types
Mid Size Business
Small Business
Enterprise
Freelance
Nonprofit
Government
Startup
Supported Languages
English

Lumo Categories and Features

Lumo Customer Reviews

Write a Review
  • Reviewer Name: A Verified Reviewer
    Position: Chief Admin
    Has used product for: Less than 6 months
    Uses the product: Daily
    Org Size (# of Employees): 1 - 25
    Feature Set
    Layout
    Ease Of Use
    Cost
    Customer Service
    Would you Recommend to Others?
    1 2 3 4 5 6 7 8 9 10

    Outstanding!

    Updated: Oct 06 2025
    Summary

    Excellent experience. Their "kitty kat" mascot is cute and there whenever I open it, and their answers are very conversational and on target for what I was seeking.

    Positive

    Easy to use and ask questions. Answers are easy to understand, helpful and on target. Totally PRIVATE, they are NOT earning money by selling my data - thus I pay for it.

    Negative

    None found yet. Been using only a couple of months - but had tried ChatGPT, and CoPilot before.

    Read More...
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