Head-to-Head Comparison
| Feature | AI Humanizer | Undetectable.ai |
|---|---|---|
| Price | Free | From $9.99/mo |
| Word limit | 500 words/request | Varies by plan |
| Modes | 3 (standard, stealth, academic) | Multiple advanced modes |
| Built-in detection score | No | Yes |
| Signup required | No | Yes |
| API access | No | Yes (enterprise) |
| Multi-language | English | 30+ languages |
Undetectable.ai is the market leader in AI text humanization — the tool people reach for when they need AI-generated content to pass detection scans. It offers multiple bypass modes tuned for specific detectors, a built-in detection score preview, and consistently high success rates across GPTZero, Originality.ai, and Turnitin.
The Mode Advantage
Undetectable.ai lets you choose output modes optimized for different detection tools. It previews your detection score before and after humanization, so you know if the text will pass before you use it. Txtory offers three modes — standard, stealth, and academic — but does not include a built-in detection preview. You would need to run a separate detection check afterward.
The Price of Reliability
Undetectable.ai starts at $9.99 per month for limited words, scaling up with volume. That cost buys you more consistent bypass rates, especially against newer detection models. Txtory is free but works with a general-purpose LLM rather than a model specifically fine-tuned for evading detection. For casual use, Txtory works well. For high-stakes submissions, Undetectable.ai’s tuned models offer more confidence.
The Bottom Line
Undetectable.ai is the tool for users who need the highest bypass rates and are willing to pay for them. Txtory is the free starting point — good enough for most use cases, with zero cost and no account required.