Compare Gemini CLI vs Grammarly vs Capacities
| Feature | Gemini CLI | Grammarly | Capacities |
|---|---|---|---|
| Description | Google's open-source AI agent that brings Gemini into your terminal. Built for: Makers who want a free-tier AI agent in the terminal. Format: CLI. License: Apache-2.0. Open source on GitHub (107,286 stars as of 2026-10-11). Privacy note: Usage statistics are sent to Google by default; you can opt out in settings. | 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 and open source; self-hosting, model or API costs may apply | $12/month | Basic free forever; Pro about $9.99/mo; Believer from about $12.49/mo |
| Main category | Coding | Writing | Research and notes |
| Website | Visit Gemini CLI | Visit Grammarly | Visit Capacities |
| Info last checked | October 12, 2026 | October 12, 2026 | October 13, 2026 |
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