Undetectable
Undetectable AI is a solution designed to optimize the quality of AI-generated text in order to circumvent detection from AI-based oversight tools. It offers a ...
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What is Undetectable?
Undetectable AI is an artificial intelligence content detection and modification software designed to identify and alter AI-generated text from large language models like ChatGPT, GPT-5, Gemini, Claude, Llama, and DeepSeek. The platform offers two core tools: an AI Detector that checks if text will be flagged as AI-generated with up to 99% accuracy, and an AI Humanizer that rewrites AI content to make it undetectable while maintaining high quality and legibility.
Key features include the AI Detector with 100% detection of AI content and 0% false positives on human-written text, AI Humanizer with Light, Standard, and Deep Rewrite modes, multi-language support for 50+ languages, Chrome Extension for scanning content anywhere online, AI Image Detector, AI Audio Detector, AI Video Detector for deepfake detection, Writing Style Replicator API, Sentence Rewriter, Word Counter, and API integration for developers. The detector provides AI detection probability from major checkers in one click.
The tool is perfect for bloggers and online content writers who want to maintain authenticity, SEO professionals and digital marketers ensuring quality standards, students and academics verifying originality before submissions, writers/journalists/freelancers protecting their writing style, teachers and educators checking student submissions for academic integrity, and researchers/technical writers maintaining credibility in scientific publications. It is also trusted by 23M+ users including businesses, educators, publishers, and global institutions.
Undetectable pricing
Pricing model: Freemium
Free tier: AI Detector is completely free with no signup required, giving instant results. Paid plans (charged annually): 10K words/month at $5.00/mo ($60/year), 20K words/month at $9.50/mo ($114/year), 35K words/month at $15.75/mo ($189/year). All plans include: passes AI detectors, high quality legible content, watermark and future proof, writing level matching, API compatible, Unlimited Human Auto Typer, Unlimited AI Detecting. Custom pricing available for 50K+ words. Business Solutions offer: custom pricing & plans, non-expiring credits, redistribution & white labeling, priority support, Access to Smart Job Applier. API billing: Check for AI API costs 1/10th the humanize cost (100 words checked = 10 credits deducted). New API accounts receive 250 free word credits. Bulk pricing for teams requires contacting sales at [email protected].
Undetectable pros
- 99%+ accuracy proven by independent tests and scientific studies
- 100% detection of AI-generated text with 0% false positives on human content
- Detects ChatGPT, GPT-5, Claude, Gemini, Llama, and paraphrased content
- Free AI Detector requires no signup and gives instant results
- Multi-language support for 50+ languages with reliable detection
- Undetectable guarantee: refund if generated content is detected, no questions asked
- AI Humanizer passes all major AI detectors we've tested
- Processing time of 10-30 seconds per document
- Chrome Extension works anywhere you write online (social media, emails, Google Docs)
- API available with 250 free word credits for new accounts
- No maximum usage limits on API, only 3 requests per second default rate limit
- Text is never stored or used to train models, ensuring confidentiality
- Business Solutions include stricter data retention controls and priority support
- Watermark and future proof protection on humanized content
- Writing level matching to preserve original tone and complexity
- Unlimited Human Auto Typer and Unlimited AI Detecting on all paid plans
- Zapier no-code integration for 7,000+ tool connections
- Embeddable widget available for WordPress, Squarespace, Webflow websites
- Forbes-nominated best AI detector on the market
- High quality, legible content output from humanizer
Undetectable cons
- English offers highest accuracy, other languages have lower detection quality
- Primary focus is English, multilingual humanization is secondary support
- Default API rate limit of 3 requests per second requires contact for higher volumes
- No free humanizer tier mentioned, only free detector without signup
- Word credits expire monthly on standard plans (except Business non-expiring credits)
- Webhook integration available only upon request for high-volume customers
- Bulk pricing requires contacting sales team, not transparently listed
- Personal use and redistribution plans available but details not fully public
- 250 free API credits may be insufficient for heavy testing
- Humanizer costs 10x more than detector (detector is 1/10th humanize cost)
Frequently asked questions about Undetectable
What is the UNDETECTABLE guarantee?
If anything Undetectable AI generates is detected by any AI detector, you can reach out to [email protected] with the document and where it was detected, and they will refund the cost of the generation no questions asked.
Does the tool detect ChatGPT and other AI models?
Yes, the tool is specifically trained to detect ChatGPT, GPT-4, GPT-5-style models, Claude, Gemini, and Llama. It identifies AI-written text from Gemini, Claude, DeepSeek, and main generation models as they come out, so detection is always up to date.
Do I need to sign up to use the AI Detector?
No, the Free AI Detector requires no signup and gives instant results. You simply paste your text and click 'Check for AI.'
Does the humanizer pass every AI detector?
Yes, the AI detection bypass technology focuses on producing high quality humanized AI content. The outputs are so indistinguishable from human-written content that they flag as human on all AI detectors Undetectable has tested.
How long does it take to process a document?
The processing time depends on the length and complexity of the input and specific client requirements. The typical processing time to receive a humanized document with AI detection removed is 10-30 seconds per document.
What languages does the AI humanizer support?
English is the primary focus, but there is secondary multilingual text humanization support for 50+ languages including Afrikaans, Arabic, Bulgarian, Bengali, Catalan, Czech, Welsh, Danish, German, Greek, Spanish, Estonian, Persian, Finnish, French, Gujarati, Hindi, Croatian, Hungarian, Indonesian, Italian, Japanese, Korean, Dutch, Norwegian, Polish, Portuguese, Romanian, Russian, Slovak, Swedish, Thai, Turkish, Ukrainian, Vietnamese, Chinese (Simplified and Traditional), and many more.
Is my text stored or used to train models?
No, your text is never stored or used to train models. For teams, Business Solutions include even stricter data retention controls.
Does the tool detect rewritten or paraphrased AI content?
Yes, the tool is designed to identify rewritten or obfuscated AI content, including material modified by paraphrasing tools like QuillBot, Grammarly, and other AI rewriters. It detects 100% of paraphrased AI content.
What can I check with the AI Detector?
You can check essays, blog posts, academic writing, emails, SEO content, research papers, and any long-form or short-form text. The AI Checker supports multi-language detection as well.
Does the API have usage limits?
There are no maximum usage limits, but by default there is a rate limit of 3 requests per second per IP address. If you need to process higher volumes of content, you can reach out to [email protected] to raise your API limit. Webhook integration is available upon request for high-volume customers.