Decision Support · Side-by-side
Compare pricing, strengths, and use cases so it is easier to pick the right fit.
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AI Detector by 15Tools
Best overallFor most everyday users, AI Detector by 15Tools wins because it offers a generous free tier and fast, simple sentence-level detection without needing a paid subscription. The biggest difference is price: 15Tools is free for casual use, while SEOToolBox starts at $59/month and is better suited for professionals who need deep technical accuracy and SEO integration.
AI Detector by 15Tools
AI Detector by SEOToolBox
Scores at a glance
Choose AI Detector by 15Tools if
Choose AI Detector by SEOToolBox if
Key differences
Facts side by side
| AI Detector by 15Tools | AI Detector by SEOToolBox | |
|---|---|---|
| Free plan | ||
| Mobile app | ||
| API access |
Common questions
Yes, for most students 15Tools is better because it's free and fast. SEOToolBox is overkill and too expensive for occasional essay checks.
No, neither tool has a mobile app. You can access 15Tools through a phone browser, but the interface is not optimized for small screens.
SEOToolBox is more accurate for legal and highly structured text because it has fewer false positives in that area. 15Tools may flag legal jargon as AI-written.
No, the free tier is generous for casual use. You only need to pay if you regularly exceed the word limits or need batch processing.
SEOToolBox offers a robust API for developers, while 15Tools does not have an API. For automated workflows, SEOToolBox is the only option.
AI Detector by 15Tools is the best free option for everyday users; SEOToolBox is the premium pick for professionals who need accuracy and SEO features.
If you just need a quick, free check on a short piece of writing, go with AI Detector by 15Tools — it's simple and does the job. But if you're a professional who needs high accuracy for client work or SEO audits and can afford $59/month, SEOToolBox is the more reliable choice.
Detail pages: AI Detector by 15Tools · AI Detector by SEOToolBox
