Proton, the company best known for Proton Mail and Proton VPN, has launched Lumo for Business, a new version of its privacy-first AI assistant designed specifically for teams. The move marks the third major update to Lumo in just three months and signals Proton’s push to bring confidential, end-to-end encrypted AI to the enterprise market.
While generative AI tools such as ChatGPT and Google Gemini have become ubiquitous in the workplace, their use has raised growing concerns about data privacy and compliance. Many of these systems operate as closed “black boxes,” with little visibility into how they store or handle sensitive information. The risk of corporate data exposure or government access requests has led some companies to ban their use altogether.
Proton says Lumo for Business addresses this issue by combining the productivity benefits of AI with strict privacy and compliance safeguards. Protected by European data protection laws and Proton’s zero-access encryption, the platform allows teams to collaborate securely without risking leaks of customer or proprietary data.
“Generative AI has changed everything and stands to create the biggest societal shift since the creation of the internet itself. This is true for consumers, but possibly even more so for businesses. AI assistants boost productivity and are already widespread in the workplace. But they come with serious risks,” said Eamonn Maguire, Director of Engineering for AI at Proton. “Many businesses have already banned ChatGPT and we’re seeing reports of multinational companies building their own in-house AI because they can’t risk their data disappearing into a black box. But small businesses don’t have the resources to build their own ChatGPT from scratch. That’s the gap Lumo fills. Companies shouldn’t have to choose between competitive advantage and data security. With Lumo, they get both: enterprise-grade AI that keeps their sensitive data safe.”
Built on the same foundation of privacy and transparency as Proton’s other products, Lumo for Business offers encrypted chat storage, GDPR compliance, and open-source transparency, ensuring that both the AI models and codebase can be independently verified.
The service also integrates with Proton Drive, allowing users to securely upload and reference documents, such as PDFs, during conversations. Proton says this feature allows Lumo to generate more contextually accurate responses without compromising security.
Unlike many enterprise AI platforms that require complex setup or costly licensing, Lumo for Business is a self-service, affordable solution designed for teams of any size. Employees can get started directly via the Lumo website or mobile apps without IT support.
Key features of Lumo for Business include:
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Zero-access encryption: Chat histories are stored securely and can only be decrypted by the individual user.
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Data sovereignty: Hosted entirely in Europe, Lumo complies with GDPR and benefits from some of the world’s strongest privacy laws.
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Transparency: Lumo’s code and models are open source, allowing public verification of its security and functionality.
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Productivity tools: Teams can summarize meetings, analyze datasets, write code, and draft documents — all within a secure environment.
Proton reports that millions of individuals already use Lumo for personal productivity tasks such as summarizing information, drafting content, and searching the web. With this latest update, businesses can now access the same technology — but with the enterprise-grade privacy and compliance safeguards they require.
More information about Lumo for Business is available on the Proton blog.
