No. 23 of 45 ·AI Content Detection Software

Undetectable AI

Name: Undetectable AI
Price: 5 USD

Web · API · Extension · paid plans from $0.42/mo

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Freedom report

One barScore 5.4

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

Undetectable AI is ranked #23 of 45 in AI content detection software on Freedom251. It runs on API, Browser extension, Web. A free trial is offered. Paid plans start at $0.42/mo.

Undetectable AI plans and pricing

All plans

10K words/month $5/yr $5.00/mo; Charged annually $60.00 10K words/month · Unlimited AI Detecting · API compatible undetectable.ai · 3 Oct 2026

20K words/month $9.50/yr $9.50/mo; Charged annually $114.00 20K words/month · Unlimited AI Detecting · API compatible undetectable.ai · 3 Oct 2026

35K words/month $15.75/yr $15.75/mo; Charged annually $189.00 35K words/month · Unlimited AI Detecting · API compatible undetectable.ai · 3 Oct 2026

50K words/month $21.25/yr $21.25/mo 50K words/month · Includes all features from other plans undetectable.ai · 3 Oct 2026

API Starter $29/mo $29/mo 72,500 words included · $0.40 / 1K words after allowance · Standard rate limits · Email support undetectable.ai · 3 Oct 2026

API Growth $49/mo $49/mo 245,000 words included · $0.20 / 1K words after allowance · Higher rate limits · Priority support undetectable.ai · 3 Oct 2026

Compared on AI content detection software

Free plan: Yes
Paid from: $9.99/mo
File uploads: Yes
API access: Yes
Browser extension: Yes
Batch scanning: Yes

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The record

What it does: The AI Detector checks whether text may be AI-generated and names ChatGPT, Gemini, Claude, and other models as detectable sources.
Free detector: The site says its AI Detector is free, requires no signup, and returns instant results.
Trial limit: The pricing page says the free trial is limited to 250 words and additional use requires paid plan activation.
Detection languages: The detector page says it supports 50+ languages, with English offering the highest accuracy.
Text limit: The detector input shows a limit of 10,000 words.
Detector methods: The site says its detector uses linguistic, semantic, and pattern-analysis models to identify AI-generated writing.
Privacy claim: The detector FAQ says submitted text is never stored or used to train models, and that business solutions have stricter data-retention controls.
Who it serves: The detector page describes use by bloggers, SEO professionals, students, academics, writers, educators, and researchers.
Extension compatibility: The extension page names Google Docs, LinkedIn, Gmail, Microsoft Word Online, Notion, ChatGPT, and Claude among supported sites.
API capabilities: The API page lists text detection, humanization, image, audio, and video detection, plus a writing-style replicator.
Integrations: The API page says Zapier can connect the service with Google Sheets, RSS feeds, email, and 7,000+ other integrations.
API limits: The API FAQ says the default rate limit is 3 requests per second per IP address, and higher limits can be requested.
Support: The API Starter plan includes email support, while the Growth plan includes priority support.
Headquarters: 1309 Coffeen Avenue, Sheridan, Wyoming, US 82801
Price from: $0.42/mo

Where it ranks on Freedom251

Best AI Content Detection Software in 2026#23 of 45
Best AI Detection Software in 2026#18 of 30
Best AI Text Humanizers in 2026#11 of 25

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Sources

undetectable.ai/ai-detector· checked 3 Oct 2026
undetectable.ai/pricing· checked 3 Oct 2026
undetectable.ai/chrome-extension· checked 3 Oct 2026
undetectable.ai/develop· checked 3 Oct 2026