Compare Kagi vs ProWritingAid vs Onyx
| Feature | Kagi | ProWritingAid | Onyx |
|---|---|---|---|
| Description | Kagi is a paid, ad-free search engine that includes Kagi Assistant for AI answers and research help. It is funded by its users rather than advertising, so you get focused results and AI help without tracking. | ProWritingAid helps writers improve grammar, style, and story structure with reports and AI rewrites. A free tier lets you start, and Premium plans add deeper critique tools for people finishing books and long documents. | A self-hosted AI chat and search platform that connects to your team's documents and apps. Built for: Small teams who want an AI assistant over their shared knowledge. Format: Self-hosted web app (Docker). License: Open-core: MIT, except ee/ directories (Onyx Enterprise License). Open source on GitHub (32,407 stars as of 2026-10-11). |
| Pricing | Free trial of 100 searches; Starter $5/mo; Professional $10/mo; Ultimate $25/mo (annual discount available) | Free tier available; Premium about $30/mo monthly or $10/mo billed yearly ($120); Premium Pro about $36/mo monthly or $12/mo yearly; lifetime options listed | Free and open source (open-core: some features are paid); self-hosting, model or API costs may apply |
| Main category | Chat assistants | Writing | Research and notes |
| Website | Visit Kagi | Visit ProWritingAid | Visit Onyx |
| Info last checked | October 17, 2026 | October 14, 2026 | October 13, 2026 |
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