AI Models & Platforms Freemium

Lumo

Privacy-first AI assistant with encrypted chats and open-source code

Visit official website
PricingFreemium
Free planYes
Free trialYes
APIUnknown
Open sourceYes
DeploymentCloud
Last verifiedJuly 30, 2026
Overview

Tool overview

Lumo is listed under AI Models & Platforms AI tools.

Summary

What is Lumo?

Proton Lumo provides Private AI assistant with no logs, encrypted history, and open-source clients. It is designed for Individuals, Privacy-conscious professionals, Technical users and supports focused workflows rather than a generic AI experience.

Best fit

Best for

Users prioritizing privacy for general AI assistance

Audience

Who is it for?

IndividualsPrivacy-conscious professionalsTechnical users
Recommendation

Decision note

Re-researched from current official sources in two passes under V411. Preview only. Apply only after failures = 0, warnings = 0, unmapped = 0, all explicit clears are reviewed, image import is disabled or V380 dimensions pass, and one representative WordPress edit screen is checked against the CSV.

Capabilities

Key features

Zero-access encrypted chat history

No-logs conversation processing

Open-source code

Fast and thinking reasoning modes

Workflows

Use cases

Private everyday assistance

Confidential writing and research

Research and reasoning support

Technical assistance without profiling

Strengths

Pros

  • Clear AI use case with practical workflow value
  • Official product information supports the core profile
  • Open-source access supports technical evaluation and control
Considerations

Limitations

Output quality depends on connected data, instructions, integrations, and workflow design. Teams should review customer-facing or regulated results, define escalation rules, and confirm privacy, security, and compliance requirements before broad deployment.

Cost

Pricing details

Pricing modelFreemium
Free planYes
Free trialYes
Pricing context

Billing options

MonthlyYearlyBi-yearly
Pricing context

Pricing note

Lumo offers Guest, Free, Plus, and Business access. Paid plans support monthly, yearly, or bi-yearly billing and a 30-day money-back guarantee, not a standing free trial.

View official pricing
Compatibility

Supported languages

  • English
  • French
  • German
  • Spanish
  • Italian
Connectivity

Integrations

Proton Drive

Web search

File uploads

Specs

Technical details

PlatformsWeb, iOS, Android
Multilingual supportYes
Login requiredNo
Open sourceYes
LicenseGPL-3.0 for official mobile clients
DeploymentCloud
CompanyProton AG
Launch year2025
Current version2.0
Models / versionsLumo 2.0 Lite Lumo 2.0 Max Fast mode Thinking mode
Editions / plansFree, Basic, Professional, Organization, and Custom plans
Data confidenceHigh
Last verifiedJuly 30, 2026
Documentation → Source code → Release notes → Data source →
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Answers

Frequently asked questions

Proton Lumo provides Private AI assistant with no logs, encrypted history, and open-source clients. It is designed for Individuals, Privacy-conscious professionals, Technical users and supports focused workflows rather than a generic AI experience.
Users prioritizing privacy for general AI assistance
The listed pricing model for Lumo is freemium. Pricing can change, so users should verify the latest plan details on the official website.
Yes. The current profile indicates that a free trial is available.
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