Pros & Cons
✓ PROS
Highest detection accuracy we tested — caught GPT-4o, Claude, and Gemini outputs
Combines AI detection + plagiarism check in one scan
Readability scoring alongside detection results
Team features: scan multiple URLs, export reports, API access
Full-site scan mode — checks entire domains, not just pasted text
✗ CONS
Credit model gets expensive for high-volume content operations (100K+ words/mo)
Occasional false positives on highly formulaic human writing
No real-time browser extension (must paste text or submit URL)
Who Should Use It?
✓ Great for
→ SEO agencies managing AI content at scale
→ Publishers with contributor networks
→ Content managers verifying AI usage policies
✗ Not ideal for
→ Casual bloggers who write their own content
→ Writers who don't need AI detection in their workflow
Real Output Sample
Actual output from our test session — same prompt across all tools so you can compare.
ORIGINALITY.AI · REAL OUTPUTOriginality.ai scan of a 1,000-word blog post:
→ AI Probability: 94% (Flagged)
→ Plagiarism: 0% unique content issues
→ Readability: Grade 9 (Good)
Paragraph-level breakdown:
[Para 1] AI: 98% — "The landscape of digital marketing has evolved significantly..."
[Para 3] AI: 72% — Mixed signals, likely AI-assisted editing
[Para 7] AI: 12% — Likely human-written
Conclusion: High AI probability. Recommend manual rewrite of flagged paragraphs before publishing.
Marcus Webb
Founder, WriteTested · 14 years in content · 500+ hours testing AI tools
I ran a 20-person content agency before GPT-4 changed the industry. I shut down half the team and started testing every AI writing tool obsessively. Every score on this site comes from real work — not toy prompts, not sponsored placements.