# Lumo (Proton) — AI Compare Ninja

> Private AI chat by Proton, per the vendor with no logs and no training on chats.

## Overview
- **Category:** Productivity (Assistants & workspaces)
- **Status:** Active · checked - Active Free and Plus access.
- **Paid from:** $9.99 per month billed annually ($12.99 monthly) / Monat (Plus)
- **Free access:** Free plan
- **Website:** https://lumo.proton.me/
- **Canonical URL:** https://www.aicompare.ninja/en/tool/lumo

## What it does
- Per the vendor no logs of conversations
- Per the vendor no training on chats
- Per the vendor open-source models on servers Proton controls

## In brief
Lumo is the AI assistant by Proton AG in Geneva. Per the vendor, open-source language models run on servers Proton controls, and chats are neither logged nor used for training.

Free costs nothing with limited usage. Per the pricing page, Plus costs $12.99 monthly or $9.99 per month billed yearly and adds more messages, more image generation and unlimited projects.


## Pricing tiers
| Tier | Price | Period | What you get |
| --- | --- | --- | --- |
| Free | free | Monat | Limited Max model usage; Limited messages and chat history; Limited image generations; 1 project |
| Plus | $9.99 per month billed annually ($12.99 monthly) | Monat | More Max model usage; More messages and chat history; More image generations; Unlimited projects; Unlimited custom Lumos; 30-day money-back guarantee |

## Sources
All details regarding plans, limits, and features are based on official vendor documentation and the primary sources verified below.

- https://lumo.proton.me/about
- https://proton.me/support/lumo-privacy
- https://proton.me/legal/terms

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*Source: AI Compare Ninja (2026) - https://www.aicompare.ninja/en/tool/lumo*