Compare Duck.ai vs Grammarly vs Capacities
| Feature | Duck.ai | Grammarly | Capacities |
|---|---|---|---|
| Description | Duck.ai is DuckDuckGo private AI chat. It helps you ask questions and draft answers without building an advertising profile around your prompts, so you can get help while keeping everyday browsing privacy habits. | AI writing assistant for clarity and correctness | Capacities is a notes and knowledge app built around objects and daily notes. The Basic plan stays free, and Pro adds AI assist so you can explore and connect ideas while keeping ownership of your knowledge base. |
| Pricing | Free private AI chat (DuckDuckGo Duck.ai) | $12/month | Basic free forever; Pro about $9.99/mo; Believer from about $12.49/mo |
| Main category | Chat assistants | Writing | Research and notes |
| Website | Visit Duck.ai | Visit Grammarly | Visit Capacities |
| Info last checked | October 14, 2026 | October 12, 2026 | October 13, 2026 |
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