Pros & cons
Our analysisPros
- Free to use with no paywall
- API available for developers
- Browser extension for in-context checking
- Instant results on pasted text
Cons
- Accuracy not independently specified
- No listed integrations beyond browser
- Limited to detection, no rewriting
What users say
Undetectable AI is commonly used by students, editors, and content managers who want a fast, free way to check whether a piece of text is likely AI-generated. A frequently noted strength is that both the web tool and browser extension are free with an available API. A common limitation is that detection reliability on short or heavily edited text is not independently quantified.
Editorial summary based on public information.
Best for
Anyone needing a quick free AI-text detection check
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Monster Labs| Feature | Undetectable AI | Jasper AI |
|---|---|---|
| Pricing | Free | Freemium |
| Price from | — | $59/mo |
| Free tier | Yes | Yes |
| API | Yes | Yes |
| Open source | No | No |
| Platforms | Browser Extension | Web |
| Models | Undetectable | Jasper |
| Context window | 8k | 32k |
| Launched | 2023 | 2020 |
| Languages | English | — |
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Verified Jun 2026
Specs
| Pricing | Free |
|---|---|
| Free tier | Yes |
| API | Yes |
| Open source | No |
| Platforms | Browser Extension |
| Models | Undetectable |
| Languages | English |
| Context window | 8k |
| Launched | 2023 |