Undetectable AI

Undetectable AI is an AI-powered content analysis and writing platform designed to help users detect, refine, rewrite, and improve AI-assisted text. The platform combines an AI detector, AI humanizer, paraphrasing tools, writing tools, and several authenticity-detection products in one service. Its current product ecosystem also includes AI image detection, AI voice detection, AI video detection, deepfake detection, fake-document detection, and other content-verification tools.

Undetectable AI was created by Christian Perry, with Devan Leos joining during the company’s pre-launch stage. The company’s own history places the beginning of the project in January 2023, when Perry identified a need for software that could make AI-assisted writing sound more natural. Following the public release, the company expanded the platform from a text humanizer into a broader suite of AI detection and content-improvement tools.

The platform’s central product is its AI Detector. It analyzes submitted text and estimates whether the content is likely to have been generated by artificial intelligence. Rather than relying on a single detector, Undetectable AI says its system uses multiple detection sources and a federated approach to assess content. This is intended to give users a broader view of how their text may be classified by AI-detection systems.

The detector can be used with a wide range of content types, including essays, articles, blog posts, research documents, emails, SEO content, and other short- or long-form writing. Users can submit text to receive an assessment and identify sections that may require additional review.

Another major part of the platform is the AI Humanizer. The tool rewrites AI-assisted text by changing sentence structure, vocabulary, tone, and phrasing in an attempt to make the writing sound more natural and readable. Users can select or work with different writing levels and use the system to refine text rather than simply generating new material from scratch.

Undetectable AI’s humanization process is closely connected to its detection system. The company explains that the humanizer checks generated output against its detection models as part of the rewriting process. This creates a workflow in which users can assess a passage, revise it, and then assess it again.

The platform also provides an AI Paraphraser. This tool rewrites existing material while attempting to preserve its original meaning. It can be useful for improving clarity, varying sentence construction, or creating an alternative version of an existing passage.

For users who want assistance with questions and problem solving, Undetectable AI offers an AI Question Solver. Its browser extension can also allow users to interact with this functionality while working online.

Another feature is Human Typer, which is designed to reproduce the appearance of natural typing activity. The current product ecosystem also includes a Smart Job Applier designed to assist users with job-search and application workflows, including finding jobs according to defined criteria and tailoring application materials.

Undetectable AI has expanded beyond text through its AI Image Detector. This tool analyzes images and attempts to determine whether an image was generated using artificial intelligence. The platform also offers AI Voice Detection and AI Video Detection for identifying potentially AI-generated audio and video content.

The company additionally provides tools for deepfake detection and verification of specific types of digital files and documents. The current product list includes Fake PDF Detector, Fake Receipt Detector, and Fake ID Detector. These features position Undetectable AI as more than a writing application and place it within the broader AI-content verification category.

The platform also has a Chrome extension that brings several of its tools into the browser. Users can highlight text on websites and access functions such as AI detection, humanization, paraphrasing, question solving, and Human Typer. The extension works across many common web applications, including Google Docs, Gmail, Microsoft Word Online, Notion, ChatGPT, Claude, LinkedIn, social-media platforms, Medium, and WordPress.

This browser-based workflow is one of Undetectable AI’s biggest productivity advantages. Users do not necessarily need to copy text into a separate application every time they want to check or revise it. Instead, the tools can be accessed directly where the user is already writing.

Undetectable AI also supports business and enterprise use. Its Business Solutions are intended for organizations processing larger volumes of content and provide custom pricing, non-expiring credits, priority support, redistribution and white-label options, stricter data-retention controls, API access, and access to additional tools.

Privacy is another area emphasized by the company. Undetectable AI states that user text is not sold and that Business Solutions can provide stricter retention controls. The company’s current privacy and business materials position the platform for professional workflows where users may need greater control over submitted content.

The platform provides API access for developers and businesses that want to integrate its humanization and detection features into their own software or workflows. The APIs use a REST architecture, while webhook and callback integrations are available to customers upon request. New accounts receive a small amount of API credit for testing.

Undetectable AI can therefore be incorporated into larger content workflows rather than used only through its website. Businesses can send content programmatically for AI detection or humanization and use the returned results inside their own systems.

The platform is also multilingual. Undetectable AI’s current help documentation lists support for 50+ languages, with English identified as the platform’s primary focus and strongest-performing language. Multilingual support covers its AI humanization and detection capabilities, although performance can vary between languages.

The supported language list includes major international languages such as English, Spanish, French, German, Chinese, Japanese, Portuguese, Arabic, Hindi, Russian, Korean, Italian, Dutch, and many others. The platform also supports several African languages, including Swahili, Yoruba, Hausa-related multilingual workflows through supported language coverage, and additional regional languages.

Undetectable AI has been used by writers, bloggers, marketers, SEO professionals, researchers, professionals, and other users who want to assess or improve AI-assisted writing. The platform currently reports more than 24 million users, although this is a company-reported figure rather than an independently audited user count.

The company has also received media attention and states that its AI tools have been featured by organizations including Forbes, Business Insider, ABC, BuzzFeed, BBC, Nature, and other publications. These mentions reflect media exposure rather than independent certification of product performance.

The platform provides a money-back guarantee connected to its AI-humanization service. The company states that when content it generates is flagged as non-human, eligible customers can contact support and request a refund for the humanization cost under the stated guarantee.

Undetectable AI’s current product direction is broader than its original humanizer. It now combines content detection, text refinement, AI-assisted writing, image analysis, audio and video detection, digital authenticity tools, browser-based productivity tools, job-application assistance, and APIs.

For content professionals, the platform can be useful as a writing refinement and content-analysis workspace. Its AI detector can provide an assessment of content, while the humanizer and paraphrasing tools can be used to improve fluency and presentation. Its browser extension makes these tools available across common writing environments.

One consideration is that AI-detection results should not be treated as absolute proof of authorship. AI detectors can produce false positives and false negatives, and detection scores may vary between systems. Users should therefore treat detection results as signals for review rather than definitive evidence about who wrote a piece of text.

Another consideration is content quality. Automated rewriting can change sentence structure and wording, but users should still review the output for accuracy, meaning, tone, and originality. Human editing remains important for professional, academic, and high-stakes content.

Undetectable AI is best suited to users who need AI-content detection, writing refinement, paraphrasing, multilingual content analysis, and browser-based AI writing tools. Its broader detection suite also makes it useful for organizations interested in assessing AI-generated media and digital content.

Pricing

Undetectable AI currently offers several monthly and annual word-based plans:

10K Words

$9.99/month

$5/month when billed annually

• 10,000 words/month
• AI Humanizer
• AI Detection
• Writing-level matching
• API compatibility
• Unlimited Human Auto Typer

20K Words

$19/month

$9.50/month when billed annually

• 20,000 words/month
• AI Humanizer
• AI Detection
• Writing-level matching
• API compatibility
• Unlimited Human Auto Typer

35K Words

$31/month

$15.75/month when billed annually

• 35,000 words/month
• AI Humanizer
• AI Detection
• Writing-level matching
• API compatibility
• Unlimited Human Auto Typer

50K Words

$42.50/month

$21.25/month when billed annually

• 50,000 words/month
• All features included in the lower plans
• Higher monthly word allowance

Business

Custom pricing

• Custom plans and credits
• Non-expiring credits
• Redistribution and white labeling
• Priority support
• API compatibility
• Stricter business controls
• Additional business tools

Undetectable AI currently offers a limited free trial of 250 words before paid usage is required.

Review

Undetectable AI is primarily differentiated by combining AI detection and AI-assisted content refinement in one platform. Instead of offering only an AI detector, it gives users tools for analyzing, rewriting, paraphrasing, and improving content as part of the same workflow.

Its Chrome extension is another strong point. The ability to access AI detection, humanization, paraphrasing, and other tools directly inside websites such as Google Docs and Gmail can make the platform convenient for everyday writing workflows.

The platform also has a relatively flexible pricing structure. Users can choose different monthly word allowances, receive substantial annual discounts, or contact the company for custom business arrangements and non-expiring credits.

Third-party customer feedback is generally positive on G2. Undetectable AI currently has a 4.4/5 rating from 37 reviews, with 70% of reviewers giving it five stars and 24% giving it four stars. Reviews commonly mention ease of use, natural-sounding revisions, and usefulness for improving emails and other written communications.

However, the review volume is still fairly small compared with the platform’s reported user base. Individual experiences can also vary depending on the type of text being analyzed and the language being used.

One important limitation is that AI-detection technology is not perfectly reliable. Detection scores can differ between tools, and content should not be judged solely on the basis of an automated detector result.

The same applies to automated rewriting. Humanization and paraphrasing can improve readability, but users should check the resulting text to ensure that meaning, factual accuracy, terminology, and personal voice have not been unintentionally changed.

Undetectable AI is strongest for content checking, writing refinement, paraphrasing, multilingual content work, and AI-generated media detection. It offers a broader collection of tools than a typical AI detector, although users looking for a general-purpose AI assistant or a full marketing platform will likely need a different solution.