Lumo
Privacy-first AI assistant from Proton with zero-access encrypted chats and no logging
Freemium
Msty
Private AI workspace for chatting with local and online models, with your data under your control
Freemium
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.
Best overall
Msty
- Privacy-conscious individuals
- Developers
- Researchers
- Educators
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.
- Best for beginners
- Lumo
- Best for business
- Msty
Features
19 features compared.
- Zero-Access Encrypted ChatsLumoAvailableMstyNot available
- Open-Source ModelsLumoAvailableMstyNot available
- Web SearchLumoAvailableMstyNot available
- Image Generation and EditingLumoAvailableMstyNot available
- ProjectsLumoAvailableMstyNot available
- Custom LumosLumoAvailableMstyNot available
- Proton Drive IntegrationLumoAvailableMstyNot available
- Guest ModeLumoAvailableMstyNot available
- Memory and PersonalizationLumoAvailableMstyNot available
- Local and Online ModelsLumoNot availableMstyAvailable
- Knowledge StacksLumoNot availableMstyAvailable
- Personas and Crew ConversationsLumoNot availableMstyAvailable
- Agent ModeLumoNot availableMstyAvailable
- Toolbox with MCPLumoNot availableMstyAvailable
- Prompt, Persona, Skill and Media StudiosLumoNot availableMstyAvailable
- Studio WebLumoNot availableMstyAvailable
- Msty Go AgentsLumoNot availableMstyAvailable
- Msty NexusLumoNot availableMstyAvailable
- Enterprise GovernanceLumoNot availableMstyAvailable
Pricing
Plans as listed by each vendor. Check their sites for current prices.
- Pricing modelLumoFreemiumMstyFreemium
- Free planLumoYesMstyYes
- Starting priceLumo$0Msty$0
- PlansLumo2 plansMsty4 plans
Lumo plans
Lumo Free
$0
Limited free access, no credit card required
- Limited Max model usage
- limited messages and chat history
- limited image generations
- 1 Project
Lumo Plus
Most popular$12.99/month
Individuals who want higher limits
- More Max model usage
- more messages and chat history
- more image generations
- unlimited Projects
- unlimited Custom Lumos
Msty plans
Studio Free
$0
Free desktop workspace for local and online model chat
- Local and online model chat
- Persona and Crew Conversations
- Agent Mode
- Knowledge Stacks
- Prompt Studio
- Persona Studio
- Skill Studio
- Media Studio (several features limited)
Aurum
$149/year
Power-user tier billed yearly
- Studio Web
- Azure and Bedrock providers
- Studio Assistants
- Shadow Personas
- Turnstiles
- Insights
- Forge Mode
Aurum Lifetime
Most popular$349/one-time
One-time purchase with all Aurum features
- All Aurum features
- lifetime updates and access
Enterprise & Teams
Custom/custom
Sales-led plan for organizations, minimum 5 seats
- SSO
- user and team management
- role-based access control
- audit logs
- shared team resources
- priority support
Our ratings
Scored out of 10 by the Finder Atlas editorial team. Last reviewed October 2026.
- Lumo
- 7.6overall
- Msty
- 8.1overall
Lumo leads in 2 categories and Msty in 3.
Ease of Use
Lumo leads by 0.5- Lumo
- 8.5
- Msty
- 8.0
Feature Depth
Msty leads by 1.6- Lumo
- 7.0
- Msty
- 8.6
Value for Money
Msty leads by 0.9- Lumo
- 7.5
- Msty
- 8.4
Performance & Speed
Msty leads by 0.6- Lumo
- 7.2
- Msty
- 7.8
Documentation & Support
Lumo leads by 0.2- Lumo
- 7.8
- Msty
- 7.6
Scores weigh documented features, plan value, platform coverage, integrations and user feedback. A missing score means we have not rated that area yet.
Pros and cons
Lumo
Pros
- 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.
Cons
- 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
Pros
- 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).
Cons
- 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.
Platforms
- WebLumoSupportedMstySupported
- WindowsLumoNot supportedMstySupported
- macOSLumoNot supportedMstySupported
- iOSLumoSupportedMstySupported
- AndroidLumoSupportedMstySupported
- APILumoNot supportedMstyNot supported
- Browser ExtensionLumoNot supportedMstyNot supported
- LinuxLumoNot supportedMstySupported
Integrations
Lumo
1 integration- Proton Drive
Msty
9 integrations- Ollama
- Azure OpenAI
- Amazon Bedrock
- Discord
- Telegram
- Docker
- Podman
- MCP
Company
- CompanyLumoProton AGMstyCloudStack, LLC
- FoundedLumo2014MstyNot listed
- HeadquartersLumoGeneva, SwitzerlandMstyNot listed
- ListingLumoClaimedMstyClaimed
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Frequently asked questions
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.