What is Lumo Professional?

Lumo Professional is a premium tier of Proton's private AI assistant designed specifically for businesses that require advanced security and productivity features. Lumo professional provides access to advanced AI models, unlimited chats and projects, and live web search functionality. It also equips your team with extended chat history and large file uploads to accommodate complex professional workflows.

Workspace is a comprehensive ecosystem of secure communication and collaboration tools tailored for organizations that prioritize privacy and compliance. It includes zero-access encrypted email, calendar, cloud storage, password manager, video conferencing, and VPN, all managed under a single subscription.

Why is Lumo more secure than other AI tools for business?

Unlike many competitors who may store or analyze user prompts to train their models, Lumo ensures that your interactions remain strictly confidential and are never used for external purposes. Its zero-access encryption architecture guarantees that sensitive business strategies, intellectual property, and personal data are protected from unauthorized access or data mining practices. Even Proton cannot view the content of your conversations.

Private AI for Business: Plans and pricing

Give your organization the power of AI, while your data stays with you — and only you.

Lumo Professional
Includes these features:
- More Max model usage
- More messages & chat history
- More image generations
- Unlimited Projects
- Unlimited Custom Lumos
- Administrative tools
- Compliance with data protection regulations
Workspace Premium
Everything in Lumo Professional plus:
- 3 TB storage per user
- 20 custom email domains
- Secure mail and calendar
- Appointment scheduling
- Cloud storage and file sharing
- Document & spreadsheet editor
- Video meetings, 250 participants
- VPN with ad-blocker and malware protection
- Password manager with team vaults
- Data retention policies

30-day money-back guarantee

Why businesses choose Lumo

Whether automating routine tasks or enabling smarter team decisions, Lumo provides AI for business without compromising your privacy.

Optimize workflows with secure AI

Boost efficiency with built-in web search for real-time insights, access files and folders with Proton Drive integration, and create dedicated projects that keep every task organized and context-aware.

Maintain true confidentiality

Our no-logs infrastructure guarantees Lumo keeps no record of your chats, while zero-access encryption ensures that only you can read your chat history — not even Proton can.

Prevent AI training on your data

Lumo is fully open source, so anyone can verify our apps do exactly what we claim. The non-profit Proton Foundation ensures we stay true to our mission to build a better internet.

Operate under European protection

Built and based in Europe, Lumo leverages rigorous privacy laws to shield your data from government surveillance, third-party demands, and US data requests.

Validate our claims

Lumo is fully open source and powered exclusively by open-source models, allowing anyone to verify that our apps perform exactly as claimed. Our code is publicly available for your review.

Maintain certified compliance

Lumo is designed to support GDPR and HIPAA standards, backed by Proton's ISO 27001 and SOC 2 certifications — giving your legal and security teams peace of mind.

Frequently asked questions

What is Lumo Professional?: Lumo Professional is a premium tier of Proton's private AI assistant designed specifically for businesses that require advanced security and productivity features. Lumo professional provides access to advanced AI models, unlimited chats and projects, and live web search functionality. It also equips your team with extended chat history and large file uploads to accommodate complex professional workflows.
What is Workspace?: Workspace is a comprehensive ecosystem of secure communication and collaboration tools tailored for organizations that prioritize privacy and compliance. It includes zero-access encrypted email, calendar, cloud storage, password manager, video conferencing, and VPN, all managed under a single subscription.
Why is Lumo more secure than other AI tools for business?: Unlike many competitors who may store or analyze user prompts to train their models, Lumo ensures that your interactions remain strictly confidential and are never used for external purposes. Its zero-access encryption architecture guarantees that sensitive business strategies, intellectual property, and personal data are protected from unauthorized access or data mining practices. Even Proton cannot view the content of your conversations.