AIDetector.cx vs Semrush (2026)
We compared both. Here is the honest comparison.
AIDetector.cx
79/100
Free – $10/mo
GoodVS
Semrush
79/100
$140/mo
Top PickScore Breakdown
Category
AIDetector.cx
Semrush
Output Quality
77
▼ Loses80
▲ WinsSpeed
88
▲ Wins72
▼ LosesEase of Use
86
▲ Wins64
▼ Losesfeatures
83
▼ Loses94
▲ WinsOverall
79
79
Pricing
Starting Price
Free – $10/mo
$140/mo
Real Price
$10/mo (Pro)
$140/mo
Price Note
Free: 5 lifetime checks · Pro $10/mo (300 credits) · $120/yr
Pro plan (1 user)
AIDetector.cx
Best For
✓ Bloggers and SEO teams screening their own drafts before publishing
✓ Budget users who want a $10/mo all-in-one over per-credit pricing
✓ Non-English content across 19+ languages
Not For
✗ Agencies needing forensic, defensible verdicts on heavily-edited AI
✗ High-volume teams that will exhaust 5 free checks immediately
Semrush
Best For
✓ SEO agencies
✓ Enterprise content teams
✓ Serious niche site builders
Not For
✗ Beginners
✗ Low-budget operations
✗ Simple keyword research
Pros & Cons
AIDetector.cx
+ Nailed obvious AI — a ChatGPT paragraph scored 71% (Balanced) to 98% (strict), and it named the cliché transitions to cut
+ Very low false positives — a genuine human anecdote cleared at 95% human
+ Honest by design: shows confidence tiers, flags when its two engines disagree, and publishes no inflated accuracy %
+ All-in-one at $10/mo Pro — dual-engine detector plus humanizer, plagiarism check and 19-language support
+ Explicit responsible-use framing — warns against treating a score as sole proof
− Polished, cliché-free AI can slip the Balanced engine — a naturalistic AI sample read 85% human / 'Inconclusive'
− Free tier is stingy: 5 checks for the life of the account, not per day
− Newer and less battle-tested than Originality.ai, with a smaller public track record
− The two engines often disagree, so borderline text still needs human judgment
Semrush
+ Most comprehensive keyword database: 25B+ keywords
+ Competitor traffic analysis is best-in-class
+ Position tracking with daily updates
+ Site audit catches 130+ technical SEO issues
+ ContentShake AI writes SEO articles inside the tool
− Expensive — $140/mo is steep for solo operators
− Data overload — overwhelming for beginners
− Some features duplicated across tools