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QuillBot is the world's most popular paraphrasing tool with 75M+ users. SynthQuery is a newer platform that combines AI detection, humanization, and 50+ tools. Here's how they compare across key features.
QuillBot excels at paraphrasing with 10 modes and a Chrome extension. SynthQuery offers stronger AI detection, humanization, and a broader tool suite including SEO and image tools.
| Feature | SynthQuery | QuillBot |
|---|---|---|
| Paraphraser Modes | Multiple styles | 10 modes (incl. Custom, Boomer) |
| AI Detection | Advanced sentence-level + DeepScan | Basic detection |
| AI Humanizer | 7 modes with bypass testing | 2 modes (40-60% effective) |
| Readability Analysis | 20+ formulas | Not available |
| Grammar Checker | AI corrections | Multi-language (EN, DE, FR, ES) |
| Plagiarism Checker | Included in plans | Premium only, 20 pages/mo |
| Chrome Extension | Not yet available | 5M+ installs, works everywhere |
| Freeze Words | Not available | Protect specific terms from rewriting |
| Synonym Slider | Not available | Granular rewording control |
| SEO Tools | Schema generators, meta tools, keyword tools | Not available |
| Image Tools | 15+ image tools (resize, compress, convert) | Basic image tools |
| API Access | RESTful API | No public API |
| Total Tools | 50+ tools | 50+ writing-focused tools |
| User Base | Growing | 75M registered, 25M MAU |
| Word Processor Integration | Not yet | Google Docs, Word add-ins |
| Plan | SynthQuery | QuillBot |
|---|---|---|
| Free | Free tier | Free (125 words) |
| Starter | $9.99/mo | $9.95/mo |
| Pro | $19.99/mo | $19.95/mo |
Users who need AI detection, humanization, readability analysis, and a full-stack content toolkit with API access.
Try SynthQuery FreeUsers focused primarily on paraphrasing who want browser integration and word processor add-ins.
50+ AI-powered tools for detection, humanization, readability, SEO, and more. No sign-up required.