Compare Lumo by Proton vs Grammarly vs AppFlowy
| Feature | Lumo by Proton | Grammarly | AppFlowy |
|---|---|---|---|
| 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 | AppFlowy is an open-source workspace for docs, tasks, and databases with optional AI helpers. A free Personal cloud plan and self-host options let you keep data closer, while Pro unlocks higher AI and collaboration limits. |
| Pricing | Free $0; Lumo Plus $12.99/mo monthly or $9.99/mo billed yearly ($119.88/yr) | $12/month | Personal free at $0/mo; Pro about $16/member/mo billed annually ($20 monthly); self-host options available |
| Main category | Chat assistants | Writing | Research and notes |
| Website | Visit Lumo by Proton | Visit Grammarly | Visit AppFlowy |
| Info last checked | October 17, 2026 | October 12, 2026 | October 13, 2026 |
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