| Grammarly AI Humanizer | GPTHuman.ai | |
|---|---|---|
| Starting price | $12/mo | $25/mo |
| Free tier | 0 words | 200 words |
| Bundled detector | No | Yes |
| Founded | 2024 | 2024 |
| Best for | Professionals who want more natural-sounding AI-assisted drafts without a dedicated bypass-focused tool. | Users who want a built-in confidence score and don't mind paying a premium for it. |
Price: Grammarly AI Humanizer is cheaper to start, at $12/mo vs $25/mo.
Grammarly AI Humanizer: Included in Grammarly Premium ($12/mo annual) and Business plans.
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
Grammarly AI Humanizer: Grammarly is explicit that the feature is meant to improve natural tone rather than guarantee detector evasion, which sets it apart from bypass-first competitors.
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: GPTHuman.ai bundles a built-in detector; Grammarly AI Humanizer does not.
Strengths at a glance
Grammarly AI Humanizer
- Built into an app most professionals already have installed (browser, desktop, Docs)
- Focuses on clarity and flow rather than aggressive detection evasion
- Backed by Grammarly's long-standing grammar and tone engine
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 Grammarly AI Humanizer if: professionals who want more natural-sounding ai-assisted drafts without a dedicated bypass-focused tool. Choose GPTHuman.ai if: users who want a built-in confidence score and don't mind paying a premium for it.
Full Grammarly AI Humanizer review → · Full GPTHuman.ai review →