IsItAI vs Content at Scale AI Detector: AI detector comparison
A side by side look at pricing, methodology, language support and best-fit use case. Every claim on this page is linked to a source at the bottom.
Last updated . Reviewed by IsItAI Editorial.
At a glance
IsItAI
UK, 2024UK-built AI detection that gives you a confidence score, not a verdict.
- Pricing
- From £4.99/month
- Free tier
- 5 scans/day free
- API
- Yes
- Languages
- 30
Content at Scale AI Detector
US, 2022Free tool from a content-generation platform that produces 'undetectable' AI.
- Pricing
- Free
- Free tier
- Free unlimited
- API
- No
- Languages
- 1
Side by side
| Feature | IsItAI | Content at Scale AI Detector |
|---|---|---|
| Free tier | 5 scans/day free | Free unlimited |
| Starting price | From £4.99/month | Free |
| Cost per 1k words | £0.05 (Pro plan equivalent) | Free |
| API available | Yes | No |
| Languages supported | 30 | 1 |
| Founded | 2024 | 2022 |
| Country | UK | US |
| Primary audience | Educators, recruiters and content teams | SEO writers and marketers |
| Best for | Teachers, students and recruiters who want a clear confidence score and source-passage highlighting | Quick free check against the same kind of content their generator produces |
| Known weakness | Smaller brand than US incumbents | Heavy conflict of interest. The same company sells AI generation and AI detection |
How each tool works
IsItAI
Method: Multi-model ensemble. Combines several open detectors and weights agreement. Returns a confidence band rather than a binary verdict.
Data handling: GDPR compliant. UK and EU hosted. Submitted text is not stored after the scan completes.
Content at Scale AI Detector
Method: Free classifier from a company whose primary product is AI content generation marketed as 'undetectable'.
Data handling: Stores submissions. Note the commercial conflict of interest.
How accurate are AI detectors? What the research says
Two findings from independent academic research apply to almost every detector on this list, including IsItAI and Content at Scale AI Detector.
1. False positives on non-native English writers. Liang et al. (Stanford, 2023) found that GPT detectors flagged over half of TOEFL essays written by non-native English speakers as AI-generated, while flagging almost none of the essays from US students. If your use case involves non-native English writers, never treat a detector verdict as proof on its own.
2. Paraphrasing reliably defeats classifiers. Sadasivan et al. (Maryland, 2023) showed that running AI output through a paraphraser drops detection performance close to chance. Both IsItAI and Content at Scale AI Detector are vulnerable to this.
Where IsItAI wins
- API access available. Content at Scale AI Detector is web only.
- Wider language support at 30 versus 1 languages.
- Built for educators, recruiters and content teams.
Where Content at Scale AI Detector wins
- Built for seo writers and marketers.
- Method: Free classifier from a company whose primary product is AI content generation marketed as 'undetectable'.
Which one should you pick, IsItAI or Content at Scale AI Detector?
IsItAI suits teachers, students and recruiters who want a clear confidence score and source-passage highlighting. Content at Scale AI Detector suits quick free check against the same kind of content their generator produces. Pick based on which fits your workflow. Treat any detector verdict as a screening signal, not proof.
Frequently asked questions
Is IsItAI free?
5 scans/day free
Is Content at Scale AI Detector free?
Free unlimited
Can either tool be fooled by paraphrasing?
Yes. Sadasivan et al. (2023) demonstrated that paraphrasing reliably defeats most AI classifiers. Treat any detector verdict as a screening signal, not proof.
Are AI detectors fair to non-native English writers?
Independent research (Liang et al. 2023) found high false-positive rates for non-native English writing. Always combine a detector signal with other evidence, never use it as a sole basis for an academic or hiring decision.
Which one should I pick if I have to choose one, IsItAI or Content at Scale AI Detector?
IsItAI suits teachers, students and recruiters who want a clear confidence score and source-passage highlighting. Content at Scale AI Detector suits quick free check against the same kind of content their generator produces. Pick based on which fits your workflow. Treat any detector verdict as a screening signal, not proof.
Try IsItAI free
5 free scans a day. No credit card. UK hosted and GDPR compliant.
Sources and further reading
- IsItAI homepage
- Pricing
- How it works
- Content at Scale AI detector
- Liang et al. (Stanford, 2023): GPT detectors are biased against non-native English writers
- Sadasivan et al. (2023): Can AI-generated text be reliably detected?