Undetectio

Undetectio positions itself as a simpler, more service-oriented alternative in the crowded "undetectable AI" space. Its homepage is written more like a small studio than a pure utility: it talks about closing the gap between AI-generated and human-written content, and it frames the tool as something that supports writers rather than replacing them.

The product is organised around three offerings. The core one is AI content refinement, which rewrites machine text into fluent, natural phrasing. On top of that sit a plagiarism detection scan so you can confirm the rewritten passage is original, and a set of editing tools for clarity, flow, tone and grammar.

The process is three steps: paste or upload your text, let the engine optimise it, and copy the result. A free tier allows about 1,000 words per month, which is enough to evaluate quality but not to run a production workflow. The company also advertises an automatic refund if content still trips detectors, which is a notable risk-reversal for this category.