Introduction
Ahrefs, best known for its industry-leading SEO tools, recently added a free AI Content Detector and Humanizer to its writing suite. Given the brand’s strong track record in analytics, we had high expectations.
This review puts the tool to the test, evaluating its rewrite quality, bypass performance, and overall utility in modern AI workflows.
What the Tool Claims to Do
Ahrefs describes the tool as a way to:
Detect AI-generated content and rewrite it to sound human with our AI Content Detector. Paste your text and get accurate, human-like results in seconds!
On paper, it functions like many other AI humanizers: paste your text, run detection, then generate humanized variants (1, 3, or 5 versions). The rewritten content is meant to appear more “natural”, but not necessarily to bypass AI detectors.
Important to note: Nowhere does Ahrefs claim the tool will bypass GPTZero, Turnitin, or Copyleaks. That’s not the intended use case. It appears more focused on improving tone and clarity than on bypassing detection software.
Pricing
The Ahrefs AI humanizer is 100% free to use. However, it's part of a broader ecosystem of high-cost SEO tools. Their paid plans start at:
| Plan | Price/month | Crawl Credits | Users Included |
|---|---|---|---|
| Lite | $129 | 100,000 | 1 |
| Standard | $249 | 500,000 | 1 |
| Advanced | $449 | 1,500,000 | 1 |
Rewrite Variants: 1, 3, or 5 Options
One unique feature is the option to generate multiple rewritten versions — 1, 3, or 5 at a time. In theory, this gives users flexibility. In practice, though, the quality doesn’t scale with the number of variants.
Across all our tests, the rewrites shared the same core weakness: they functioned more like basic paraphrases than true AI humanization. Instead of bypassing AI detectors, the output consistently failed to bypass detection tests.
Despite being labeled an “AI Humanizer,” it appears the tool was not built to bypass detectors at all. Instead, it functions more like a basic paraphraser. It seems primarily built to capture search traffic around AI detection and humanizer tools, rather than to provide a serious solution for bypassing AI detectors.
AI Detection Results: Failed Across the Board
We took Ahrefs’ humanized output and ran it through major AI detection tools.
Here are the raw results:
| Detector | Result |
|---|---|
| GPTZero | ❌ 100% AI |
| ZeroGPT | ❌ 100% AI |
| Turnitin | ❌ 100% AI |
| Copyleaks | ❌ 100% AI |
| TwainGPT | ❌ 100% AI |
| Quillbot | ❌ 100% AI |
While Ahrefs doesn’t explicitly claim to bypass AI detectors, many users expect “humanizer” tools to provide at least minimal disguise. In this case, it made no measurable difference.
Is This Even an “AI Humanizer”?
This raises a fair question: Is Ahrefs’ tool really a humanizer?
Technically, it does rewrite AI-generated content in a different tone. But since it fails to bypass every major AI checker and doesn’t meaningfully enhance fluency, it functions more like a basic paraphraser.
For users hoping to create undetectable content — this is not the tool.
Final Verdict
Pros:
- Free and accessible
- Offers multiple variants
- Backed by a trusted brand
Cons:
- Completely fails AI detection
- No clear advantage over free alternatives
Unless you're already an Ahrefs user and want a light rewording tool for your own drafts, this won’t deliver much value.
Conclusion
Ahrefs may be a leader in the SEO space, but its entry into the AI humanizer and detector market feels unexpectedly weak. The humanizer lacks depth, fails basic detection tests, and provides little value in workflows where being undetectable is important.
We don’t recommend the Ahrefs AI Humanizer.
👉 Try TwainGPT Instead — the best AI humanizer that consistently bypasses GPTZero, Copyleaks, and Turnitin.