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Undetectable AI
1309 Coffeen Avenue, Sheridan, Wyoming, US 82801
What it is
Undetectable AI’s AI Detector checks whether writing may be AI-generated and identifies sources such as ChatGPT, Gemini, and Claude. It uses linguistic, semantic, and pattern analysis, supports more than 50 languages, and lists English as its highest-accuracy language. Detector input is limited to 10,000 words. The site presents a no-signup detector with instant results, while the pricing page limits the free trial to 250 words before paid activation is required. A Chrome extension adds detection, humanization, paraphrasing, question solving, and a human typing simulator, with named support for Google Docs, LinkedIn, Gmail, Microsoft Word Online, Notion, ChatGPT, and Claude. The API includes text, image, audio, and video detection, humanization, and writing-style replication; Zapier connects it with Google Sheets, RSS feeds, email, and other integrations. Plans include $5 a year for 10K words/month and API tiers from $29 a month.
For and against
For
- Supports more than 50 languages
- 10,000-word detector input limit
- Chrome extension includes several writing tools
- API supports multimodal detection
- Submitted text is not stored for training
Against
- Free trial is limited to 250 words
- Additional use requires paid activation
- English is listed as highest-accuracy language
- API default rate is three requests per second per IP
The verdict
Undetectable AI combines a web detector with browser and API tools for checking and transforming content. The free entry point is constrained by a 250-word trial limit, with paid plans covering larger usage.
Who it suits
The detector is aimed at bloggers, SEO professionals, students, academics, writers, educators, and researchers. Its extension and API also suit users working inside supported sites or connecting automated workflows.
Plans and prices
50K words/month
50K words/month · Includes all features from other plans
Read 3 Oct 2026 · undetectable.ai
API Starter
72,500 words included · $0.40 / 1K words after allowance · Standard rate limits · Email support
Read 3 Oct 2026 · undetectable.ai
API Growth
245,000 words included · $0.20 / 1K words after allowance · Higher rate limits · Priority support
Read 3 Oct 2026 · undetectable.ai
10K words/month
10K words/month · Unlimited AI Detecting · API compatible
Read 3 Oct 2026 · undetectable.ai
20K words/month
20K words/month · Unlimited AI Detecting · API compatible
Read 3 Oct 2026 · undetectable.ai
35K words/month
35K words/month · Unlimited AI Detecting · API compatible
Read 3 Oct 2026 · undetectable.ai
Business
Non-expiring credits · Redistribution and white labeling · Priority support · API compatible
Read 3 Oct 2026 · undetectable.ai
On the record
- API capabilities
- The API page lists text detection, humanization, image, audio, and video detection, plus a writing-style replicator.undetectable.ai · read 3 Oct 2026
- API limits
- The API FAQ says the default rate limit is 3 requests per second per IP address, and higher limits can be requested.undetectable.ai · read 3 Oct 2026
- Browser extension
- The free Chrome extension offers AI detection, humanization, paraphrasing, question solving, and a human typing simulator.undetectable.ai · read 3 Oct 2026
- Detection languages
- The detector page says it supports 50+ languages, with English offering the highest accuracy.undetectable.ai · read 3 Oct 2026
- Detector methods
- The site says its detector uses linguistic, semantic, and pattern-analysis models to identify AI-generated writing.undetectable.ai · read 3 Oct 2026
- Extension compatibility
- The extension page names Google Docs, LinkedIn, Gmail, Microsoft Word Online, Notion, ChatGPT, and Claude among supported sites.undetectable.ai · read 3 Oct 2026
- Free detector
- The site says its AI Detector is free, requires no signup, and returns instant results.undetectable.ai · read 3 Oct 2026
- Integrations
- The API page says Zapier can connect the service with Google Sheets, RSS feeds, email, and 7,000+ other integrations.undetectable.ai · read 3 Oct 2026
- Privacy claim
- The detector FAQ says submitted text is never stored or used to train models, and that business solutions have stricter data-retention controls.undetectable.ai · read 3 Oct 2026
- Support
- The API Starter plan includes email support, while the Growth plan includes priority support.undetectable.ai · read 3 Oct 2026
- Text limit
- The detector input shows a limit of 10,000 words.undetectable.ai · read 3 Oct 2026
- Trial limit
- The pricing page says the free trial is limited to 250 words and additional use requires paid plan activation.undetectable.ai · read 3 Oct 2026
- What it does
- The AI Detector checks whether text may be AI-generated and names ChatGPT, Gemini, Claude, and other models as detectable sources.undetectable.ai · read 3 Oct 2026
- Who it serves
- The detector page describes use by bloggers, SEO professionals, students, academics, writers, educators, and researchers.undetectable.ai · read 3 Oct 2026
