Best AI Content Detectors in 2026
Updated
In short: ContentDetector.org is ranked #1 of 25 as of 4 October 2026, ahead of GPTZero and AI Detectors.io. The best-ranked option with a free plan is GPTZero. The lowest first paid tier on this page is It's AI at $0.42/mo.
AI content detectors are designed to assess writing for signs of AI generation or alteration. Compare API access and batch scanning if you expect to check multiple pieces or connect a tool to another workflow; word limits and paraphrase detection help distinguish the scope of checks. Detection languages, browser extensions, and free-plan availability offer further points to weigh, alongside paid-from pricing. The entries begin with Originality.ai, GPTZero, and Pangram, followed by Winston AI and ContentDetector.org. AI Detectors.io, It’s AI, and Copyleaks AI Detector also appear near the start. Consider which listed capabilities suit the writing and workflow you need to evaluate.
25 AI content detectors ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Recognised 40% · Phone app 26% · Documented 20% · Free plan 14% of the score
- 1 ContentDetector.org iPhone only RecognisedPhone appDocumentedFree plan 7.7Free
- 2 GPTZero No phone app RecognisedPhone appDocumentedFree plan 6.4$8.33/mo Detection languages: 5 languagesParaphrase detection: Yes
- 3 AI Detectors.io No phone app RecognisedPhone appDocumentedFree plan 6.3$0.69/mo Word limit: 25,000 wordsParaphrase detection: Yes
- 4 It's AI No phone app RecognisedPhone appDocumentedFree plan 6.3$0.42/mo Word limit: 150,000 wordsParaphrase detection: Yes
- 5 Originality.ai No phone app RecognisedPhone appDocumentedFree plan 6.3$12.95/mo Detection languages: 30 languagesWord limit: 10,000 wordsParaphrase detection: Yes
- 6 Pangram No phone app RecognisedPhone appDocumentedFree plan 6.3$1.67/mo Detection languages: 24 languagesWord limit: 300,000 wordsParaphrase detection: Yes
- 7 Proofademic No phone app RecognisedPhone appDocumentedFree plan 6.3$15/mo Detection languages: 23 languagesWord limit: 3,500 wordsParaphrase detection: Yes
- 8 TrustOriginality.ai No phone app RecognisedPhone appDocumentedFree plan 6.3€4.99/mo
- 9 Winston AI No phone app RecognisedPhone appDocumentedFree plan 6.3$0.42/mo Detection languages: 16 languagesParaphrase detection: Yes
- 10 AI Detector Pro No phone app RecognisedPhone appDocumentedFree plan 6.0Free Detection languages: 5 languages
- 11 Detecting-AI.com No phone app RecognisedPhone appDocumentedFree plan 6.0$7/mo
- 12 EyeSift No phone app RecognisedPhone appDocumentedFree plan 5.8Free
- 13 Copyleaks AI Detector No phone app RecognisedPhone appDocumentedFree plan 5.6 Detection languages: 30 languagesWord limit: 300,000 wordsParaphrase detection: Yes
- 14 TheChecker.AI No phone app RecognisedPhone appDocumentedFree plan 5.6$8.25/mo Detection languages: 1 languagesParaphrase detection: Yes
- 15 Isgen AI Detector No phone app RecognisedPhone appDocumentedFree plan 5.4$8/mo
- 16 Smodin AI Detector No phone app RecognisedPhone appDocumentedFree plan 5.2
- 17 AI-Content Detector ML No phone app RecognisedPhone appDocumentedFree plan 5.1
- 18 Airno No phone app RecognisedPhone appDocumentedFree plan 5.1 Paraphrase detection: Yes
- 19 ClassGuard No phone app RecognisedPhone appDocumentedFree plan 5.0
- 20 Content Checker by AI Aware No phone app RecognisedPhone appDocumentedFree plan 5.0 Paraphrase detection: Yes
- 21 Detecto No phone app RecognisedPhone appDocumentedFree plan 5.0
- 22 GPTKit No phone app RecognisedPhone appDocumentedFree plan 5.0
- 23 Learnaway No phone app RecognisedPhone appDocumentedFree plan 5.0 Paraphrase detection: No
- 24 Mask AI Detector No phone app RecognisedPhone appDocumentedFree plan 5.0 Word limit: 2,500 words
- 25 Elucida No phone app RecognisedPhone appDocumentedFree plan 4.7
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which AI content detector is ranked first on Samsung Mobile US Press?
ContentDetector.org is ranked #1 of 25 with a score of 7.7. GPTZero is second and AI Detectors.io third.
How many of these have a free plan?
12 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, It's AI has the lowest first paid tier we found: $0.42/mo.
How is this list ranked?
Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.