AI Humanizer vs Grammarly
Grammarly is the world's most popular writing assistant. But many users wonder: can Grammarly's rewriting features help bypass AI detectors? We tested it to find out.
Quick verdict
These tools serve completely different purposes. Grammarly is a world-class grammar checker and writing assistant, but it was never designed to bypass AI detection and fails dramatically at it (38-45% bypass rates). AI Humanizer is purpose-built for making AI text undetectable (96-98% bypass rates). Use Grammarly to polish your writing, then AI Humanizer to make it undetectable. They are complementary, not competitors.
Feature-by-feature comparison
| Feature | AI Humanizer | Grammarly |
|---|---|---|
| Turnitin bypass rate | 98% | 45% |
| GPTZero bypass rate | 96% | 40% |
| Originality.ai bypass rate | 97% | 38% |
| Purpose | AI humanization | Grammar & writing assistant |
| AI writing assistance | No | Yes (GrammarlyGO) |
| Grammar checking | No | Industry-leading |
| Plagiarism checker | No | Yes (Premium) |
| Free tier | 20/day, no account | Limited grammar checks |
| Monthly price | $12/mo | $30/mo (Premium) |
| Meaning preservation | Excellent | Not applicable |
Why Grammarly cannot humanize AI text
Grammarly focuses on grammar, clarity, and tone adjustments. Its GrammarlyGO AI features can rewrite sentences, but these changes are superficial from an AI detection perspective. The statistical patterns that detectors analyze, like perplexity distribution and burstiness, remain largely unchanged after Grammarly processing. Our tests showed Grammarly-processed AI text was still detected as AI-generated 55-62% of the time.
The best workflow: use both
Rather than choosing one over the other, the most effective approach is to use both tools in sequence. First, generate your content with AI. Second, run it through AI Humanizer to make it undetectable. Third, polish the humanized text with Grammarly to catch any grammar issues and fine-tune the tone. This gives you content that is both undetectable and grammatically flawless.
Pricing comparison
AI Humanizer at $12/month is less than half the cost of Grammarly Premium at $30/month. Since they serve different purposes, many users subscribe to AI Humanizer for detection bypass and use Grammarly's free tier for basic grammar checking, keeping total costs low.
Grammarly fixes grammar. AI Humanizer beats detectors.
Try AI Humanizer free. No account required.
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