Merlin AI is an all-in-one productivity suite that includes an AI humanizer, AI detector, AI chat, and essay writer.
The platform presents itself as a powerful assistant for writers, students, and professionals. It combines an AI detector with an AI humanizer that claims to “bypass any AI detector.”
We tested both Merlin’s AI Detector and AI Humanizer to see if they actually deliver on that promise.
🧪 AI Detection Test
Merlin’s AI Detector is fast and simple to use. It shows a percentage score indicating how much of your text is AI-generated.
However, during testing, we noticed something interesting. The Merlin AI Detector produced the exact same results as ZeroGPT, suggesting that Merlin most likely uses the ZeroGPT API for its detection system.
🤖 AI Humanizer Test
We tested Merlin’s AI Humanizer by pasting a standard ChatGPT sample and then checking the rewritten version using multiple popular AI detectors.
| Detector | Result |
|---|---|
| GPTZero | ❌ 100% AI |
| Copyleaks | ❌ 100% AI |
| ZeroGPT | ❌ 100% AI |
| Quillbot | ❌ 100% AI |
💸 Pricing & Plans
Merlin AI offers two paid plans listed as “billed annually” on its pricing page. However, when redirected to Stripe, users can toggle between monthly and annual billing options.
While this flexibility is convenient, the pricing layout can be confusing.
| Plan | Monthly | Annual | Features |
|---|---|---|---|
| Basic | $15/month | $86.40/year | 150K characters, AI detector, plagiarism checker, essay writer |
| Pro | $29/month | $228/year | 250K characters, web access, chat, AI models, humanizer |
It’s a minor UX issue, but it can leave users uncertain about what they’ll actually be charged until they reach the checkout page.
📊 Credibility & Accuracy
The AI detector provides consistent and reliable results, accurately identifying AI-generated text.
However, the AI humanizer can’t bypass AI detectors, despite its marketing claims.
While Merlin markets itself as a complete AI writing toolkit, our testing shows it’s closer to a collection of basic tools rather than a polished rewriting system.
🧾 Scorecard
| Feature | Rating | Notes |
|---|---|---|
| AI Humanizer | ⭐☆☆☆☆ (1/5) | Failed to bypass every AI detector. |
| AI Detector | ⭐⭐⭐⭐☆ (4/5) | Accurate, consistent, and performs reliably. |
| Pricing / Value | ⭐⭐⭐☆☆ (3/5) | Fair pricing, but billing structure is confusing. |
| Trust & Transparency | ⭐⭐☆☆☆ (2/5) | Misleading marketing claims. |
Overall Rating: ⭐⭐☆☆☆ (2/5)
🧩 Final Verdict
We do not recommend Merlin AI’s humanizer.
The AI Detector performs well and delivers consistent results, matching trusted tools like ZeroGPT.
However, the Humanizer failed to bypass every AI detector.
The pricing and feature list look solid at first glance, but the overall execution feels unfinished.
If you’re looking for a trusted AI humanizer, use TwainGPT.