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AI Detectors.io

aidetectors.io

From $8.33/mo Free plan WebWindowsmacOSAPIBrowser extension
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Spec score 8.6 #4 of 25 in AI Content Detectors

What it is

AI Detectors.io analyzes text associated with major language models, returning an overall AI probability, confidence scores, and sentence-level results. The site also offers a humanizer, citation verification, plagiarism checking, grammar tools, and watermark removal. Its detector says it examines perplexity, burstiness, n-gram patterns, and stylometric fingerprints. The company reports 95.2% accuracy and 3.1% false positives from an April 2026 benchmark of 500 texts. The detector is trained and benchmarked on English; it returns scores for other languages, but those languages are outside that benchmark. Access is available through the web, Chrome extension, Microsoft Word add-in, and REST API. The Word add-in supports Word 2016 and later on Windows and Mac, as well as Word for the web, and can produce PDF reports. The free plan includes 10,000 words per month and a 500-word-per-use limit. Premium is listed at $8.33 a month, billed annually, with scans up to 25,000 words. Submitted text may be processed by third-party providers and retained as long as needed to support the service.

Spec sheet

Intended users
The company describes the service for students, teachers, writers, teams, educators, publishers, and editorial teams.Read 30 Sep 2026 · aidetectors.io
API
The API is a REST interface that returns overall AI probability and can provide sentence-level scores.Read 30 Sep 2026 · aidetectors.io
Integrations
The vendor lists a Chrome extension, a Microsoft Word plugin, and an API as integrations; it says there are no LMS integrations at the moment.Read 30 Sep 2026 · aidetectors.io
Security
The privacy policy says the company uses reasonable technical and organizational safeguards, while noting it cannot guarantee absolute security.Read 30 Sep 2026 · aidetectors.io
Privacy
The privacy policy says submitted text may be processed by third-party AI and infrastructure providers and is retained only as long as needed to deliver and support the operation.Read 30 Sep 2026 · aidetectors.io
Support
The help center says the team usually responds within one business day and provides email support.Read 30 Sep 2026 · aidetectors.io
AI detection
The detector provides sentence-level analysis, confidence scores, and an overall AI probability for text associated with major language models.Read 30 Sep 2026 · aidetectors.io
Benchmark
The company reports 95.2% accuracy and 3.1% false positives on its April 2026 benchmark of 500 texts.Read 30 Sep 2026 · aidetectors.io
Browser extension
The Chrome extension lets users select text on webpages for AI detection and displays sentence-level results.Read 30 Sep 2026 · aidetectors.io
Detection signals
The detector says it checks perplexity, burstiness, n-gram patterns, and stylometric fingerprints.Read 30 Sep 2026 · aidetectors.io
Language coverage
The detector is trained and benchmarked on English; it returns scores for other languages, which the company says are not covered by its benchmark.Read 30 Sep 2026 · aidetectors.io
Microsoft Word
The Word add-in supports Word 2016 and later on Windows and Mac, plus Word for the web, and can produce PDF reports.Read 30 Sep 2026 · aidetectors.io
Other tools
The site offers a humanizer, citation verification, plagiarism checking, grammar tools, and watermark removal alongside AI detection.Read 30 Sep 2026 · aidetectors.io

Plans and prices

Free Free $0/month; forever free 3 bonus credits at signup · 10,000 words/month · 1 free credit daily · 500 words/use · Basic AI Detector · no Ultra mode or tone customization Read 30 Sep 2026 · aidetectors.io
Starter (API) Free Free 100 requests/month · up to 1,000 words/request · overall AI probability score · community support · API key dashboard Read 30 Sep 2026 · aidetectors.io
Developer (API) $29 a month $29/month 5,000 requests/month · sentence-level scores · up to 5,000 words/request · email support Read 30 Sep 2026 · aidetectors.io
Premium $100 a year $100/year; shown as $9.99$8.33/mo · 2 months free (17% off monthly) 500,000 words/month · unlimited daily credits · 25,000 words per AI Detector scan · Advanced AI Detector · Ultra mode · tone customization Read 30 Sep 2026 · aidetectors.io
Enterprise (API) Priced on request Custom Unlimited requests · higher rate limits · everything in Developer · priority support Read 30 Sep 2026 · aidetectors.io

Every AI Detectors.io plan and price →

Strong points and limits

Strong points

  • Returns overall probability, confidence, and sentence-level results.
  • Includes citation, plagiarism, grammar, and humanizer tools.
  • Chrome extension can analyze selected webpage text.
  • Word add-in supports desktop and web versions.
  • Free plan allows 10,000 words per month.

Limits

  • Free use is capped at 500 words per use.
  • Other-language scores are outside the stated benchmark.
  • No LMS integrations are listed.
  • Submitted text may be processed by third-party providers.

Who it suits

The service is aimed at students, teachers, writers, teams, educators, publishers, and editorial teams. Its Word add-in, extension, and API offer different ways to check text.

Verdict

AI Detectors.io combines detection with several writing and verification tools, plus Word, browser, and API access. Keep its English benchmark scope and submitted-text handling in mind when choosing how to use it.

Where Specifiction places it

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