# Lumo vs Msty

> Lumo: Privacy-first AI assistant from Proton with zero-access encrypted chats and no logging
> Msty: Private AI workspace for chatting with local and online models, with your data under your control

- Lumo profile: https://finderatlas.com/tools/lumo
- Msty profile: https://finderatlas.com/tools/msty
- Comparison page: https://finderatlas.com/compare/lumo-vs-msty
- Last reviewed: October 2026

## Verdict

Lumo and Msty are both AI Assistants tools. Msty scores higher in FinderAtlas's editorial review (8.1 vs 7.6 out of 10), led by feature depth and value for money. Both have a free plan or trial. Only Msty is available on Windows, macOS and Linux.

### Choose Lumo if

- You want a tool built for everyday AI chat, web-assisted questions, document and image work without conversation logging or training on user data.
- Zero-access encryption on saved chats, with a stated no-logging policy.
- Open-source code and open-source models that can be inspected.

### Choose Msty if

- You want a tool built for running local and cloud models side by side from one desktop app while keeping data on your own device.
- Permanent free Studio tier that includes local and online model chat and Knowledge Stacks.
- Data stays on the user's device, with zero product telemetry stated.

## Pricing

| | Lumo | Msty |
| --- | --- | --- |
| Pricing model | Freemium | Freemium |
| Free plan or trial | Yes | Yes |
| Starting price | $0 | $0 |

## Features

| Feature | Lumo | Msty |
| --- | --- | --- |
| Zero-Access Encrypted Chats | Yes | Not listed |
| Open-Source Models | Yes | Not listed |
| Web Search | Yes | Not listed |
| Image Generation and Editing | Yes | Not listed |
| Projects | Yes | Not listed |
| Custom Lumos | Yes | Not listed |
| Proton Drive Integration | Yes | Not listed |
| Guest Mode | Yes | Not listed |
| Memory and Personalization | Yes | Not listed |
| Local and Online Models | Not listed | Yes |
| Knowledge Stacks | Not listed | Yes |
| Personas and Crew Conversations | Not listed | Yes |
| Agent Mode | Not listed | Yes |
| Toolbox with MCP | Not listed | Yes |
| Prompt, Persona, Skill and Media Studios | Not listed | Yes |
| Studio Web | Not listed | Yes |
| Msty Go Agents | Not listed | Yes |
| Msty Nexus | Not listed | Yes |
| Enterprise Governance | Not listed | Yes |

## Platforms

| Platform | Lumo | Msty |
| --- | --- | --- |
| Web | Yes | Yes |
| Windows | No | Yes |
| macOS | No | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | No | No |
| Browser Extension | No | No |
| Linux | No | Yes |

## Lumo strengths

- Zero-access encryption on saved chats, with a stated no-logging policy.
- Open-source code and open-source models that can be inspected.
- Permanent free tier with guest access and no credit card.
- Web, iOS and Android apps.
- Run by Proton AG, a Swiss company, and stated to comply with GDPR.

## Lumo limitations

- Free chat history is kept for only 7 days.
- Uses open-source models rather than the proprietary frontier models of larger rivals.
- No desktop app or public API found.
- Lumo Plus limits are described only as "more" than Free, not as numbers, and the plan costs $12.99/month ($9.99/month billed annually).

## Msty strengths

- Permanent free Studio tier that includes local and online model chat and Knowledge Stacks.
- Data stays on the user's device, with zero product telemetry stated.
- One-time Aurum Lifetime option at $349 avoids a recurring subscription.
- Supports MCP tools and enterprise controls such as SSO and audit logs.
- Broad product family covering chat (Studio), agents (Go) and a model gateway (Nexus).

## Msty limitations

- Studio data does not sync between devices.
- Studio Web needs a connection to Studio Desktop or Sidecar for local models, Toolbox and real-time data.
- SOC 2 and ISO 27001 certifications are not yet complete.
- Msty Go is still in beta and Stack is not yet released.

## FAQ

**Is Lumo better than Msty?**

It depends on your workflow. Lumo is built for everyday AI chat, web-assisted questions, document and image work without conversation logging or training on user data. Msty is built for running local and cloud models side by side from one desktop app while keeping data on your own device.

**What are the key feature differences between Lumo and Msty?**

Lumo: Privacy-first AI assistant from Proton with zero-access encrypted chats and no logging. Msty: Private AI workspace for chatting with local and online models, with your data under your control.

**Does Lumo or Msty have a free plan?**

Yes, both do. Lumo is freemium and Msty is freemium, and each has a free plan or trial.

**Which is cheaper, Lumo or Msty?**

Both can be used for free. Paid plans differ in limits and features, so compare the tiers in the pricing table above.