Undetectable AI
Undetectable AI Inc. · Writing · AI Detection
Undetectable AI is a freemium platform that checks text against AI detectors and rewrites flagged content into human-sounding copy. It covers 100+ languages, with plans from $5/mo and an API.
About Undetectable AI
What Is Undetectable AI
Undetectable AI is a web tool for anyone whose writing keeps coming back flagged as machine-made. It runs two jobs side by side. An AI content detector scores your text against several engines at once, and an AI rewriter is there to humanize AI text so it reads like a person wrote it. The goal is to turn AI-assisted drafts into undetectable AI text, or something close to it.
The company behind it, Undetectable AI Inc., set up shop in New York in May 2023. Its humanizer is built on a model trained in-house, and the team keeps retraining it as detection engines update. You paste text, pick a writing level, and let the tool reshape the passage while holding onto your meaning and your key facts.
Two limits shape when it fits. It only works on text you already have, so you still need a draft first. And the free tier is capped, with a short trial before you have to pick a plan. Treat it as a way to clean up AI-assisted writing you've reviewed, not a shortcut past checking your own work.
Getting Started
- Open undetectable.ai and paste your text into the input box. You can also drop in a file and skip the copy-paste.
- Run the AI detector first. It scores the text against several engines and shows the readings together, so you know what you're dealing with before you change a word.
- Pick a writing level. Options range from a lighter pass to a heavier rewrite, and you set how hard the tool should push.
- Hit Humanize. Undetectable AI rewrites the passage and leaves your meaning intact. If it still scores as AI, run it again.
- Copy the output. Paid plans and the API let you push the same text through at volume rather than one box at a time.
Product Information
A quick look at Undetectable AI's pricing, supported platforms, and performance.
Best for
The users, tasks, and scenarios where this tool fits best.
Users
- Students
- Bloggers and content marketers
- Non-native English writers
Tasks
- Rewriting AI-assisted drafts before publishing
- Checking a passage before you send it
- Adjusting the same text to different audiences
- Embedding rewriting into your own product
Scenarios
- Cleaning up a batch of posts in one sitting
- Working across languages in one session
- Testing whether a passage will pass
Key features
Built-In AI Detector
Undetectable AI links several detection engines into one check, so you get more than one verdict instead of opening a tab for each. Running them together tells you how different systems score the same passage, which matters because their results often disagree. The detector is free to use, so you can test a passage before spending anything on a rewrite.
AI Humanizer
The humanizer is the heart of the product. It rewrites flagged text so it stops reading like a template, breaking up the even, predictable rhythm detectors latch onto. The company says it trained the underlying model on a large text corpus and keeps refining it as detectors change. Your meaning stays put while the phrasing loosens. If the first pass doesn't clear detection, you run it again.
Writing Level Control
You're not locked into one voice. The tool lets you set how far the rewrite should go, from a light touch that keeps most of your wording to a heavier pass that reshapes sentences. That range covers the common cases: a formal report needs to stay measured, a blog post can afford to sound looser, and a clunky line often just needs simplifying. Switching levels costs nothing but a rerun.
Multilingual Support
Undetectable AI works across more than 100 languages, including Spanish, Portuguese, German, French, Japanese, Korean, Russian, and Arabic. You can paste text in the language you write in and get it back in the same tongue. For people who don't think in English, that removes the awkward step of translating first and rewriting second.
API Access
The API lets developers send text to the humanizer and get rewritten output back in a single request. It carries the same writing level setting as the web tool, so you can match its behavior inside your own app or workflow. It's aimed at teams processing text at scale rather than one document at a time, and it's listed across the paid plans.
Pros and cons
Pros
- Detector and humanizer sit in one place, so you can check a passage and fix it without switching tools.
- It queries several detection engines at once, which gives a fuller picture than any single checker.
- Support for 100+ languages means non-English writers aren't pushed into translating first.
- A free trial lets you see how the detector and humanizer behave before you pay.
- The API makes it usable at volume for teams rather than one document at a time.
Cons
- It only rewrites text you provide. There's no drafting, research, or editing beyond the phrasing pass.
- The free trial is limited to a short word count, and the lower paid plans cap out fast for long reports.
- No humanizer can guarantee a pass on every detector, and the tool's own guidance is to rerun when the first attempt fails.
Frequently asked questions
Undetectable AI does two things. It checks whether text reads as AI-generated by running it past several detection engines, and it rewrites text that gets flagged so it reads more like human writing. People use it to clean up AI-assisted drafts before submitting or publishing them.
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