AI Content Detection & HumanizerstrialLimited free

Undetectable AI

Bundles an AI humanizer with unlimited AI-detection scanning on every paid plan

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Limited free tier

The free trial is a small one-time word allowance. Need it free right now? Try GPTZero →

What Undetectable AI does

  • Bundles an AI humanizer with unlimited AI-detection scanning on every paid plan
  • Claims to match target "writing level" when rewriting AI text
  • White-label and non-expiring credit options for agencies

Undetectable AI — straight answers

What is Undetectable AI?

Undetectable AI is listed under AI Content Detection & Humanizers, in the Content & Media Generation category on Flocci AI Tools. Bundles an AI humanizer with unlimited AI-detection scanning on every paid plan. It is free to trial, then paid, and it lives at undetectable.ai.

Is Undetectable AI free?

Partly. The free trial is a small one-time word allowance. If you need it free right now, GPTZero does the same job for free.

Can I use Undetectable AI in a browser, or is there an app?

Undetectable AI works in a normal browser tab with no install. It is available on the web, a Chrome extension and an API.

What can Undetectable AI do?

Undetectable AI does 3 things the catalog singles out: Bundles an ai humanizer with unlimited ai-detection scanning on every paid plan; claims to match target "writing level" when rewriting ai text; white-label and non-expiring credit options for agencies.

What is the best free alternative to Undetectable AI?

GPTZero is the best free alternative: it does the same job and you can start without paying. Sapling AI Detector, Copyleaks AI Detector and Pangram AI Detector also start free. The full list is on the alternatives page.

See the full list →

Undetectable AI alternatives

Compare all alternatives →

GPTZero

AI Content Detection & Humanizers
freemium
  • Free tier plus dedicated Chrome extension and AI Vision (image/document) detection
  • Hallucination detector distinct from pure AI-text detection
  • Used by 10M+ teachers/students per vendor, education-market leader
Visit

Originality.ai

AI Content Detection & Humanizers
trial
  • Combined AI detection + plagiarism + fact-checking in one scan
  • Website-wide scanning for publishers/agencies, not just single documents
  • Detects output from ChatGPT, GPT-4, Claude, and other major model families
Visit

Winston AI

AI Content Detection & Humanizers
trial
  • Image and deepfake detection alongside text AI-detection
  • OCR scanning lets it detect AI text inside scanned documents/PDFs
  • HUMN-1+ website certification badge for publishers on higher tiers
Visit

Copyleaks AI Detector

AI Content Detection & Humanizers
freemiumNew
  • Detects AI-generated text and flags likely AI passages sentence by sentence
  • Free scans up to 25,000 characters without logging in, with a daily scan cap
  • Covers many languages; Chrome extension available
Visit

Pangram AI Detector

AI Content Detection & Humanizers
freemiumNew
  • Detects AI-generated and AI-assisted text from ChatGPT, Claude, Gemini, Grok, Llama and DeepSeek
  • Free plan with about twenty checks a day after sign-up
  • 20+ languages; lower false-positive claims than older detectors
Visit

Sapling AI Detector

AI Content Detection & Humanizers
freeNew
  • Free probability score that text is AI-generated, with sentence-level highlighting
  • No account needed; up to 2,000 characters per check
  • Also PDF/Word detector and an API
Visit

Head-to-head comparisons

Undetectable AI vs GPTZeroUndetectable AI vs Originality.aiUndetectable AI vs Winston AIUndetectable AI vs Copyleaks AI DetectorUndetectable AI vs Pangram AI DetectorUndetectable AI vs Sapling AI Detector