ChatGPT vs Lumo (Proton)
A side-by-side comparison of ChatGPT and Lumo (Proton) — pricing, free tiers, and who each tool is genuinely best for.
| Tagline | OpenAI's flagship conversational AI for writing, coding, and reasoning | Privacy-first AI assistant from the makers of Proton Mail |
| Category | AI Assistants & Chatbots | AI Assistants & Chatbots |
| Pricing | Free tier; Plus $20/mo; Pro $200/mo; Team from $25/user/mo; Enterprise custom | Free tier available; paid access tied to Proton plans (verify on site) |
| Free tier | ||
| Best for | General-purpose users who want the broadest, most capable all-in-one assistant with a huge ecosystem of features and integrations. | Existing Proton users who want an AI assistant that aligns with strong privacy and Swiss data protection standards |
| Not for | Teams needing a primarily privacy-first or on-prem solution with strict data residency on the cheapest plans. | Users seeking cutting-edge model performance or extensive third-party integrations outside the Proton ecosystem |
| Use cases | Drafting emails and documents Writing and debugging code Brainstorming ideas Summarizing long text Image generation Data analysis | Private AI chat with no training data usage AI assistance integrated with Proton Mail or Drive Privacy-conscious research and drafting Secure AI for journalists or activists |
| Visit ChatGPT | Visit Lumo (Proton) |
ChatGPT
Choose it if: General-purpose users who want the broadest, most capable all-in-one assistant with a huge ecosystem of features and integrations.
Lumo (Proton)
Choose it if: Existing Proton users who want an AI assistant that aligns with strong privacy and Swiss data protection standards