Compare AI tools
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Proton LumoChatGPTClaude
| Feature | Proton Lumo | ChatGPT | Claude |
|---|---|---|---|
| Best for (differs) | Privacy-conscious users wanting an AI assistant without data harvesting | General AI help: writing, analysis, images, coding and agent-style tasks | Writing, research, coding and document work with long-form reasoning |
| Starting price (differs) | $9.99/month billed yearly at $119.88 (Lumo Plus) | Not verified | $17/month billed annually or $20 monthly (Pro) |
| Free plan | Yes | Yes | Yes |
| Ease of use | Not verified | Not verified | Not verified |
| Key features (differs) | Chat assistant for writing, research and planning, Built-in web search, Document summarization and data analysis, Image generation, Projects and Custom Lumos (Plus), Proton Drive file linking | Web search, projects and study mode on the free tier, Deep research and agent mode (Plus and above), Custom GPTs and scheduled tasks (Plus and above), Memory and data analysis, Image generation, Codex coding agent on Plus, Pro and Business | Web search, file creation and code execution, Artifacts, plus Claude Design, Slides and Docs, Projects and memory, Claude Code for software development (Pro and above), Research and Claude in Chrome (Pro and above), Connectors to apps and tools |
| Integrations (differs) | Proton Drive | Slack, Google Drive, SharePoint, GitHub, Canva | Microsoft 365, Google Workspace, Chrome, Claude Code |
| API availability (differs) | Not verified | Yes | Yes |
| Collaboration (differs) | Lumo for Business with admin controls | Business plan provides a shared workspace with admin tools; Enterprise adds SCIM | Team plan adds shared admin, central billing and enterprise search |
| Security considerations (differs) | Zero-access encrypted chats, no-logs policy, no training on chats, open source, GDPR | Vendor says Business and Enterprise content is not used for training; Business offers SAML SSO, Enterprise adds data residency. | Vendor says Team and Enterprise content is not used for training by default; Team includes SSO, Enterprise adds SCIM and audit logs. |
| Main limitations (differs) | Free plan limits messages, chat history and image generations, Few third-party integrations beyond Proton Drive, Advertised Plus price requires yearly billing | Free tier limits messages, uploads, images and deep research, Consumer-plan chats may be used for training unless you opt out, Higher-end features need a paid plan | Free plan has limited usage and a cap on projects, Claude Code and research require a paid plan, Usage limits vary by model and conversation length |
| Last verified | 11/1/2026 | 11/1/2026 | 11/1/2026 |
| Visit | Visit | Visit |
