Compare Lumo by Proton vs Grammarly
| Feature | Lumo by Proton | Grammarly |
|---|---|---|
| Description | Lumo is Proton's AI assistant for questions, writing help, and file chats, built so your conversation history stays encrypted and private. A free plan lets anyone try it, and Plus adds unlimited chats for people who want privacy-first help every day. | AI writing assistant for clarity and correctness |
| Pricing | Free $0; Lumo Plus $12.99/mo monthly or $9.99/mo billed yearly ($119.88/yr) | $12/month |
| Main category | Chat assistants | Writing |
| Website | Visit Lumo by Proton | Visit Grammarly |
| Info last checked | October 17, 2026 | October 12, 2026 |
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