Metric37 vs QuillBot Humanizer — Which AI Humanizer Is Better? (2026)
Compare Metric37 and QuillBot Humanizer. LLM-based rewriting vs synonym swapping, pricing, and output quality differences.
| Feature | Metric37 | QuillBot Humanizer |
|---|---|---|
| Rewriting method | Rewrite + quality scoring loop | Synonym swapping + paraphrasing |
| Quality scoring | Automatic human score (0-100) | No humanization scoring |
| Version history | Up to 20 versions with word-level diffs | No version tracking |
| Meaning preservation | High — LLM understands context | Variable — synonym swaps can distort meaning |
| Free tier | 1,500 words (on signup) | 125 words per paste |
| Starting price | $9/month | $9.95/month (QuillBot Premium) |
Our verdict
QuillBot is a solid general-purpose paraphrasing tool, but for AI humanization it falls short. Metric37's LLM pipeline produces more natural output, includes quality scoring, and preserves meaning better than synonym swapping.
Frequently asked questions
- Is Metric37 better than QuillBot for humanizing AI text?
- For AI humanization specifically, yes. QuillBot is primarily a paraphrasing tool that swaps synonyms, which can distort meaning and still get flagged by AI detectors. Metric37 uses LLM-based rewriting that preserves meaning while genuinely changing the statistical patterns detectors look for.
- Does QuillBot have an AI humanizer?
- QuillBot offers a paraphrasing mode but not a dedicated AI humanizer with scoring. It does not measure how human the output sounds or retry if quality is low. Metric37 includes automatic scoring and iterative refinement.
- Which tool preserves meaning better?
- LLM-based rewriters like Metric37 understand context and preserve meaning with high fidelity. Synonym-swapping tools like QuillBot can introduce awkward phrasing or change the intended meaning, especially in technical or nuanced content.
Try Metric37 free
1,500 words on signup, no credit card required. See how it compares to QuillBot Humanizer on your own text.
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