What is Lumo for Business?

Lumo for Business is a privacy-first ChatGPT alternative for teams that offers the power of AI without compromising your business data. Lumo doesn’t store your chats or use them to train the language models. That makes it the ideal AI if you work with sensitive information, like legal documents or health records.

What’s the difference between Lumo Plus and Lumo for Business?

Lumo Plus is our most powerful plan for individuals who want unlimited usage, faster responses, and the ability to upload multiple and large files. Lumo for Business gives you these benefits plus administrative tools to manage your team’s access.

How does Lumo compare with other AI assistants like ChatGPT?

Lumo is the best AI chat assistant for privacy thanks to a unique combination of technical and legal protections. AI tools like ChatGPT, Gemini, and Claude keep logs of your chats on their servers, where they can be shared with third parties, leaked to hackers, or handed over to the US government. Lumo takes a different approach by protecting your data with zero-access encryption and never keeping any logs of your chats, so only you can access your data. Not even Proton can see it, meaning we can never share it or use it to train the AI models. And because Lumo is based in Europe, you benefit from strict data protection laws that prevent mass surveillance.

Does Lumo comply with data protection regulations?

Proton’s strict no-logs policy and zero-access encryption technology make Lumo one of the safest AI chat assistants available. Your data remains on your device, and your conversations aren’t used to train the model, helping you easily comply with data protection laws like GDPR, HIPAA, or the CCPA.

Which languages does Lumo understand?

Lumo currently supports chats in English, Chinese, Spanish, French, Portuguese, Russian, German, Japanese, Korean, Italian, and Dutch.

How does Lumo protect my business data?

Lumo does not keep server-side logs and uses zero-access encryption to ensure your chats are only visible to you. Not even Proton can access your business data. Learn more about Lumo's security model [/blog/lumo-security-model]

Encrypted AI for professionals and teams

Move faster without exposing your data. Lumo gives your team the power of AI while protecting your IP, business plans, and client confidentiality.

Get Lumo for Business

Work smarter. Stay private.

Most AI tools log your chats, learn from your business data, and share it with third parties or governments. Lumo for Business gives you the opposite: complete privacy.

What Lumo does differently

Rooted in Proton's founding mission to protect digital rights and privacy, Lumo extends our commitment to a world where technology empowers rather than exploits.

Compare Lumo with:

Comparison table between Lumo AI, Gemini, Copilot, Open AI and Deepseek
	Lumo	Gemini	Copilot	OpenAI	Claude
Never uses your data to train AI	Yes	No	No	No	No
Does not log your chats	Yes	No	No	No	No
Can’t share your data with anyone	Yes	No	No	No	No
Has an ad-free business model	Yes	No	No	No	Yes
Based in a high-privacy jurisdiction	Yes	No	No	No	No
Open-source code and models	Yes	No	No	No	No
	Start a chat

Uniquely private by design

Our no-logs infrastructure means Lumo doesn’t keep any record of your chats. And zero-access encryption ensures no one but you can read your chat history — not even Proton.

Safe from AI training

Lumo never trains AI models on your chats, eliminating any risk of data breaches or your business data surfacing in someone else's response. And unlike most Big Tech AI services, we never share your queries with third parties

Protected under European laws

Reclaim your data sovereignty. Lumo is built and based in Europe, where strict privacy laws shield your data from government surveillance, third-party demands, and US data requests.

Built for transparency and trust

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.

Explore Lumo’s codebase

Certified and compliant

Lumo is designed to support GDPR and HIPAA compliance, backed by Proton's ISO 27001 and SOC 2 certifications — giving your legal and security teams one less thing to worry about.

Learn about compliance with Proton

AI for businesses that take privacy seriously

Built for organizations that demand both innovation and security, Lumo powers workflows without exposing or accessing your sensitive information.

Part of an encrypted ecosystem

Use Lumo Professional by itself or alongside other Proton for Business services. Protect all your data inside one secure platform.

Proton Mail and Calendar

Protect your communications and schedule with encrypted email and calendar.

Proton Drive

Back up files and collaborate with secure online documents and spreadsheets.

Proton Pass

Simplify team access to work logins with an encrypted password manager.

Proton VPN

Secure your network and easily control access with a dedicated VPN.

Proton Meet

Talk in private and protect every conversation with encrypted video conferencing.

Lumo

Get the power of AI while keeping business data confidential and under your control.

Frequently asked questions

What is Lumo for Business?: Lumo for Business is a privacy-first ChatGPT alternative for teams that offers the power of AI without compromising your business data. Lumo doesn’t store your chats or use them to train the language models. That makes it the ideal AI if you work with sensitive information, like legal documents or health records.
What’s the difference between Lumo Plus and Lumo for Business?: Lumo Plus is our most powerful plan for individuals who want unlimited usage, faster responses, and the ability to upload multiple and large files. Lumo for Business gives you these benefits plus administrative tools to manage your team’s access.
How does Lumo compare with other AI assistants like ChatGPT?: Lumo is the best AI chat assistant for privacy thanks to a unique combination of technical and legal protections. AI tools like ChatGPT, Gemini, and Claude keep logs of your chats on their servers, where they can be shared with third parties, leaked to hackers, or handed over to the US government. Lumo takes a different approach by protecting your data with zero-access encryption and never keeping any logs of your chats, so only you can access your data. Not even Proton can see it, meaning we can never share it or use it to train the AI models. And because Lumo is based in Europe, you benefit from strict data protection laws that prevent mass surveillance.
Does Lumo comply with data protection regulations?: Proton’s strict no-logs policy and zero-access encryption technology make Lumo one of the safest AI chat assistants available. Your data remains on your device, and your conversations aren’t used to train the model, helping you easily comply with data protection laws like GDPR, HIPAA, or the CCPA.
Which languages does Lumo understand?: Lumo currently supports chats in English, Chinese, Spanish, French, Portuguese, Russian, German, Japanese, Korean, Italian, and Dutch.
How does Lumo protect my business data?: Lumo does not keep server-side logs and uses zero-access encryption to ensure your chats are only visible to you. Not even Proton can access your business data.
Learn more about Lumo's security model