Originality.ai is a strong, well-established tool for one job: detecting AI-generated text and plagiarism at scale. Its Site Scan crawls live URLs, and it ships a real API. The honest difference is not "who crawls live pages" — both do. It is what the API returns and whether the signals are fused into one decision. Originality.ai's API returns AI-probability, plagiarism and readability; by its own documentation its quality score is "Not yet" available via API, and it explicitly does not check E-E-A-T, AI-artifacts or factual accuracy as a fused verdict. ArticleGrade fuses E-E-A-T, AI-artifact quality, factual depth and SEO/structure into a single pass/FAIL gate on the live URL — judged by two independent AI engines (one for quality and facts, one for SEO and structure) — and returns phrase-level fixes plus auto-remediation. That fused publish gate is the white space. If you want a probability that text is AI-written, Originality.ai is the right tool. If you want a go/no-go quality decision before you publish, that is what ArticleGrade is built to be.
| Capability | ArticleGrade | Originality.ai |
|---|---|---|
| Audits a live published URL | ✓ | ✓ |
| AI-detection (probability a text is AI-written) | partial | ✓ |
| Plagiarism / duplicate-content check | — | ✓ |
| E-E-A-T scoring | ✓ | — |
| AI-artifact quality scoring | ✓ | — |
| Factual-depth check | ✓ | — |
| Single pass/FAIL verdict via API | ✓ | partial |
| Phrase-level fixes + auto-remediation | ✓ | — |
| Two-LLM cross-check | ✓ | — |
Use Originality.ai when your job is detection at scale: you need a probability that a piece of text is AI-generated, a plagiarism check against the web, or a readability read — across large volumes of content, including via its API. It is mature, focused and good at exactly that. Use ArticleGrade when you need a quality decision, not a probability. ArticleGrade answers a different question: should this page go live? It fuses E-E-A-T, AI-artifact quality, factual depth and SEO/structure — the signals that decide whether Google and AI will surface the page — into one pass/FAIL verdict on the live URL, returns phrase-level fixes, auto-remediates and re-audits — so a human or a pipeline can gate publishing on a single, defensible score. The two are complementary: run Originality.ai to catch AI-written or plagiarised text, and run ArticleGrade as the publish gate that decides whether the page is good enough to ship. A few honest caveats either way. ArticleGrade does not check plagiarism, and its AI-artifact signal is a quality lens, not a forensic AI-probability score. Its E-E-A-T number is a transparent proxy (Google publishes no official numeric E-E-A-T), site-wide demotion is proportion-based so one weak page won't sink a site, and it judges the live page rather than a private draft. ArticleGrade is early-stage and building toward SOC 2 — we don't claim certifications we don't yet hold.