| GPTinf | Humbot | |
|---|---|---|
| Starting price | $12/mo | $9.99/mo |
| Free tier | 200 words | 100 words |
| Bundled detector | No | No |
| Founded | 2023 | 2023 |
| Best for | Writers who want granular control over tone and which specific sentences get rewritten. | Casual users who don't need guaranteed detector evasion, just smoother-sounding text. |
Price: Humbot is cheaper to start, at $9.99/mo vs $12/mo.
GPTinf: From $12/mo, scaling with monthly word volume.
Humbot: Free tier capped at 100 words after signup; paid plans from $9.99/mo.
Free tier: GPTinf offers a more generous free tier (200 words).
If you just want to test either tool before paying, GPTinf's 200-word allowance gives you more room to evaluate quality.
Detection performance
GPTinf: Marketed as being trained directly against detector models rather than general paraphrasing, which independent testers cite as the reason its scores hold up on technical text.
Humbot: Independent testers found its free tier underperforms its marketing claims; paid tier results were not independently verified at the same depth.
AI detector included: Neither tool bundles a built-in detector — pair either with GPTZero or Originality.ai.
Strengths at a glance
GPTinf
- Eight distinct rewriting modes (Academic, Formal, Informal, Creative, Simple, Standard, Expand, Shorten)
- Freeze-keyword feature protects technical terms and proper nouns from being altered
- Selective, sentence-level rephrase instead of forcing a full rewrite
Humbot
- Familiar, widely-reviewed brand with an active user base
- Decent performance on general blog and marketing copy
Our verdict
Choose GPTinf if: writers who want granular control over tone and which specific sentences get rewritten. Choose Humbot if: casual users who don't need guaranteed detector evasion, just smoother-sounding text.