AI Tool

Undetectable AI Review

Undetectable AI provides tools for identifying AI-generated text and images, and offers an AI humanizer to rewrite AI text to bypass detection.

shipped Aug 2, 2026freemium

Domain rating79Monthly visits391K/mo

Why it matters

1Undetectable AI has reportedly passed 8 million users since its launch in 2023, reaching over 24 million users by August 2026.

2The platform's AI humanizer consistently scores content above 90% human-written across multiple detection platforms.

3It offers an API with a default rate limit of 3 requests per second per IP address.

4The service includes a Chrome extension for direct integration into online platforms.

Specs

API Docs

View Documentation →

API Available

Yes, public API

overview

What is Undetectable AI?

Undetectable AI is a AI humanizer and detector tool developed by Christian Perry and Devan Leos that enables content marketers, bloggers, and students to rewrite AI-generated text to bypass AI detectors and identify AI-generated content. It supports replicating various writing styles and is designed for users who need to verify content authenticity or modify AI-generated text.

features

Key Features of Undetectable AI

Undetectable AI offers a suite of tools focused on AI content detection and humanization, designed to assist users in managing AI-generated text and images. The platform's core functionalities are complemented by additional utilities and integration options.

AI Detector for text, identifying machine-generated content.
AI Humanizer to rewrite AI text, aiming to make it less detectable by other AI systems.
AI Image Detector for identifying AI-generated images.
Chrome extension for direct access to detection and humanization tools within web browsers.
Capability to replicate various writing styles for diverse content needs.
Business solutions and an API available for integration and broader use cases.
Customizes text readability for academic contexts, matching specific academic levels.
Produces plagiarism-free output while preserving original meaning.
Paraphrase with precision, ensuring accuracy in rewritten content.
Includes a grammar checker and plagiarism checker.

use cases

Who Should Use Undetectable AI?

Undetectable AI is designed for a diverse range of users who interact with or produce AI-generated content, particularly those concerned with authenticity, detectability, and maintaining a human-like tone.

Content marketers and bloggers: For humanizing marketing copy and ad creative at scale to maintain brand voice and bypass AI detectors.
Students and researchers: To ensure AI-assisted academic writing maintains a human voice and avoids flagging by institutional detectors like Turnitin.
Freelancers and non-native English speakers: For producing polished, human-like content while preserving original meaning and ensuring plagiarism-free output.
Entrepreneurs and professionals: For verifying content authenticity and modifying AI-generated text in professional communications like resumes and emails.

how to use

How to Use Undetectable AI

Getting started with Undetectable AI involves accessing its web platform or Chrome extension to either detect AI content or humanize existing text. The process is designed for straightforward content submission and processing.

1Navigate to the Undetectable AI website or install the Chrome extension.
2Select either the 'AI Detector' or 'AI Humanizer' tool.
3Paste the text (up to 5000 words) into the designated input field for analysis or rewriting.
4For humanization, choose desired writing styles or readability levels.
5Initiate the process to receive a human-likeness score or the rewritten, humanized text.
6Review the output and make any necessary adjustments.

pricing

Undetectable AI Pricing & Plans

Undetectable AI operates on a freemium model, offering a free tier with limited functionality and various paid plans for expanded access to its features. Specific pricing details are available on the official pricing page.

Free Tier: Includes basic access to AI detection and humanization features with word count limits.
Paid Plans: Offer increased word counts, access to advanced features, and API compatibility, with pricing tiers available on a subscription basis (e.g., monthly or annual).
API Access: Typically gated at higher-tier Business plans, with a default rate limit of 3 requests per second per IP address.

Pros

+Consistently scores content above 90% human-written across multiple detection platforms.
+Offers a comprehensive toolkit including AI detection, humanization, image detection, and plagiarism checking.
+Features a clean interface and fast rewrite loop, enhancing user experience.
+Provides a Chrome extension for direct integration into various online platforms.
+API available for integration into custom workflows, with a default rate limit of 3 requests per second.

Cons

−Inconsistent bypass rates reported by some users, with content still being flagged by certain AI detectors, especially newer versions like Turnitin's March 2026 update.
−Humanized output can sometimes introduce grammatical errors, awkward phrasing, or distort original meaning, particularly with longer content.
−Pricing and billing issues, including auto-renewal, annual-default pricing, and a refund policy that excludes plans where more than approximately 20% of words have been used.
−API access is typically restricted to higher-tier Business plans, which are more expensive.
−Claims of being 'rated #1 on Forbes' have been flagged as unverified by independent reviews.

Policies

Pricing Page

View Pricing→

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Undetectable AI vs Competitors

Undetectable AI was an early entrant in the AI humanization market, establishing a significant user base. However, the evolving landscape of AI detectors has led to varying performance comparisons with other tools.

GPTZeroOn Stork

Specializes in detecting AI-generated text with a strong focus on educational use cases.

While GPTZero is strong in AI detection, it does not offer a text humanization feature like Undetectable AI. Users would need a separate tool for rewriting AI text to make it less detectable.

ZeroGPT↗

Provides a straightforward, free online tool for quickly detecting AI-generated content.

ZeroGPT offers a free and simple AI detection service, but it lacks the AI humanizer functionality that Undetectable AI provides for rewriting text to bypass detection.

QuillBotOn Stork

Offers advanced paraphrasing, grammar checking, and summarization tools to rephrase and improve text.

QuillBot excels at rewriting and rephrasing text, which can help make AI-generated content sound more human, but it doesn't explicitly market itself as an 'AI humanizer to bypass detection' nor does it offer an AI detection feature like Undetectable AI.

StealthWriterOn Stork

Focuses on rewriting AI-generated text to make it undetectable by AI detectors, offering both humanizer and detector features.

StealthWriter directly competes with Undetectable AI by offering both AI detection and humanization features. The trade-off might be in the specific algorithms or writing styles available, which can vary between platforms.

HIX.AI (AI Detector & AI Humanizer)↗

Offers a comprehensive suite of AI writing tools, including an AI detector and an AI humanizer designed to make text undetectable.

HIX.AI provides both AI detection and humanization, similar to Undetectable AI. The main difference might be in the overall suite of tools offered, as HIX.AI is a broader AI writing assistant, whereas Undetectable AI is more specialized in detection and humanization.

See every Undetectable AI alternative, compared→

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