Leap vs StealthWriter
A side-by-side comparison of two AI writing tools: what each one is for, how their approaches differ, and how to test them on your own text.Quick verdict
StealthWriter is a paid AI humanizer that rewrites text with the goal of lowering AI detector scores. Leap takes a different approach: its detector and humanizer run entirely in your browser, are free, and require no account. Leap's detector explains why text reads as AI, sentence by sentence, and its humanizer is a cleanup pass rather than a rewrite engine. No humanizer passes every detector every time, and neither tool should be treated as proof of anything.What each tool is for
- Leap: a free in-browser AI detector that scores text 0 to 100 from writing signals such as burstiness, stock AI phrases, hedging and transition words, em-dash density, and repetition, plus a free in-browser cleanup tool.
- StealthWriter: a web service focused on rewriting AI-generated text so it reads more human, positioned around reducing flags from AI detectors.
Feature by feature
| Feature | Leap | StealthWriter |
|---|---|---|
| Price | Free, no account | Paid plans with a limited trial |
| Where it runs | In your browser, nothing is sent anywhere | Server-side, requires an account |
| Detection output | 0 to 100 score with the sentences that weigh most highlighted | Primarily a humanizer; detection is not the focus |
| Detection transparency | Explains why: patterns, vocabulary, burstiness | N/A |
| Humanizer approach | Cleanup pass: removes stock phrases, em dashes and invisible characters, adds contractions, marks uniform sentences | Full rewrite aimed at lowering detector scores |
| Chrome extension | No | Yes |
| Time in market | Newer | Live since 2023 |
How Leap's detector works
Leap scores text from writing signals: uneven versus uniform sentence length (burstiness), stock AI phrases, hedging and transition words, em-dash density, and repetition. It highlights the sentences that weigh most on the score. Everything runs locally in your browser, so your text is never uploaded or stored.The score is a signal, not proof. Any detector can be wrong, and a score must never be the only basis for accusing anyone of using AI.How Leap's humanizer works
Leap's humanizer is a cleanup pass, not a rewrite. It replaces stock AI phrases, removes em dashes and invisible characters, adds contractions, and marks sentences of uniform length so you can vary them yourself. It runs free in your browser.It does not guarantee passing any detector and does not promise to bypass Turnitin or any other checker. Always verify your output yourself before you rely on it.When StealthWriter is the better pick
- You need a Chrome extension today. StealthWriter has one; Leap runs in the browser as a web page.
- You want an automated rewrite service rather than a cleanup pass you finish yourself.
- You value time in market. StealthWriter has been live since 2023 and has more third-party reviews.