| QuillBot Humanizer | GPTHuman.ai | |
|---|---|---|
| Starting price | $8.33/mo | $25/mo |
| Free tier | 125 words | 200 words |
| Bundled detector | Yes | Yes |
| Founded | 2017 | 2024 |
| Best for | People who already pay for QuillBot's grammar/paraphrase suite and want a decent bonus feature, not a dedicated bypass tool. | Users who want a built-in confidence score and don't mind paying a premium for it. |
Price: QuillBot Humanizer is cheaper to start, at $8.33/mo vs $25/mo.
QuillBot Humanizer: $8.33/mo billed annually, $19.95/mo monthly. Free tier: 125 words, 6 uses/day.
GPTHuman.ai: Plans start at $25/mo — one of the pricier options in the category.
Free tier: GPTHuman.ai offers a more generous free tier (200 words).
If you just want to test either tool before paying, GPTHuman.ai's 200-word allowance gives you more room to evaluate quality.
Detection performance
QuillBot Humanizer: Consistently ranks behind dedicated humanizers on Turnitin and GPTZero in third-party comparisons because it leans on synonym substitution rather than deep sentence restructuring.
GPTHuman.ai: One independent tester reported it bypassed every detector used in their test suite, the strongest single result among tools they reviewed.
AI detector included: QuillBot Humanizer bundles a built-in detector; both both include one.
Strengths at a glance
QuillBot Humanizer
- Bundled AI detector, grammar checker, and paraphraser in one subscription
- Fast — results in under 5 seconds for short passages
- Color-coded change tracking so you can see exactly what was rewritten
GPTHuman.ai
- Live 'Stealth Score' shows bypass likelihood before you export
- 'Re-humanize' feature reruns the pass if the first score isn't high enough
- Bypassed every detector tested in one independent 2026 review
Our verdict
Choose QuillBot Humanizer if: people who already pay for quillbot's grammar/paraphrase suite and want a decent bonus feature, not a dedicated bypass tool. Choose GPTHuman.ai if: users who want a built-in confidence score and don't mind paying a premium for it.
Full QuillBot Humanizer review → · Full GPTHuman.ai review →