LU
Private AI chat with zero-access encryption
Lumo is Proton’s privacy-first AI assistant for chat, search, writing, and analysis. It keeps conversations encrypted so Proton says even they can’t read them.
Agenticness = how independently a tool can take action, scored across 9 dimensions. Scored independently by David Kooi, Skylark Creations — see full rubric → Last re-evaluated 21 August 2026.
Open Source
Web
iOS
Android
API
B2B
B2C
Is this your tool? Claim this listing to manage your content and analytics.
About
What It Is
What to Know
Key Features
Zero-access encrypted chat history
Web search for up-to-date answers
Image generation
Link files and folders from Proton Drive
Unlimited projects on Lumo Plus
Use Cases
Drafting messages, reports, and other written work while keeping the content private
Asking research questions and getting web-assisted answers without exposing sensitive queries
Organizing personal or administrative tasks such as visa renewals or school applications
Agenticness
: Guided Assistant
Executes tasks you assign, one step at a time, within narrow domains.
High evidence
Last evaluated:
Aug 21, 2026
Dimension Breakdown
Action Capability
Autonomy
Planning
Adaptation
State & Memory
Reliability
Interoperability
Safety
Operator Sovereignty
Categories
Pricing
- Free: Limited Max model usage, limited messages and chat history, limited image generations, and 1 project. No credit card required.
- Lumo Plus: More Max model usage, more messages and chat history, more image generations, unlimited projects, and unlimited custom Lumos. The page says it includes a 30-day money-back guarantee, but the exact monthly price was not clearly shown in the crawled content.
Details
AddedAugust 21, 2026
RefreshedAugust 21, 2026
Agenticness
Quick Facts
DeploymentCloud-hosted
AutonomyCopilot (human-in-loop)
Model supportSingle model
Open sourceYes
Team supportSmall team
Pricing modelFreemium
Interfacechat, gui, web
Sources
Last updated
August 26, 2026
Free daily brief
When Lumo changes its pricing, we catch it the next morning
We recrawl every tool in this directory daily. AI Insider is the 3-minute brief on what actually changed — pricing, features, score moves on our 36-point rubric — often before any press coverage. Sent daily. Skipped when nothing happened.
Comments
Nothing yet. Say the first thing.
Sign in to join the conversation.