9 Best AI Detector for Teachers: Spot AI Writings in 2025?

por | Última actualización Jul 29, 2025

Mejor en general
GPTZero
4.8
  • Writing Report
  • Fast API
  • Canvas Integrations
  • Microsoft Add-On
  • Plagiarism Checker
  • Plan gratuito disponible
  • Paid Plans from $8.33
La mejor relación calidad-precio
Originality.ai
4.5
  • AI Detection
  • Plagiarism Checker
  • Chrome Extension
  • Accurate AI
  • Website Scanner
  • Prueba gratuita disponible
  • Paid Plans from $12.95
Lo más destacado
QuillBot
4.0
  • The Paraphraser
  • Grammar Checker
  • Summarizer
  • Co-Writer
  • Quillbot Keyboard
  • Plan gratuito disponible
  • Paid Plans from $4.17
El mejor detector de IA para profesores

Ever feel like your students’ writing assignments are just too perfect?

Like they’re not quite matching their usual style?

You’re not alone.

It’s tougher than ever to tell if the work you’re grading is truly your student’s own.

It’s a real problem for academic integrity.

This article will guide you through the 9 best AI detectors for teachers in 2025.

Ready to get your teaching superpower back?

Sumerjámonos.

What is the Best AI Detector for Teachers?

The best AI detector for you depends on your specific needs and budget.

Some are free; some are paid.

Some are better at catching AI-written texto, while others are easier to use.

To help you choose, we’ve put together a list of our top recommendations:

1. GPTZero (⭐4.8)

GPTZero is an AI detection tool.

It helps you figure out if text was written by a human or an AI.

It’s really useful for educators and anyone who needs to check for AI-generated content.

Unlock its potential with our GPTZero tutorial.

GPTZero Introduction

Nuestra opinión

GPTZero

Ready to see if GPTZero really works? We tested it on 100 samples. See the results for yourself. Click now!

Principales ventajas

  • Precisión: Offers 99% accuracy for AI detection.
  • False Positives: Claims a very low false positive rate (less than 1%).
  • Warranty: Comes with a 30-day money-back guarantee.
  • Características: Focuses on perplexity and burstiness, user-friendly interface, supports multiple file uploads, offers batch processing for many documents, integrates with learning platforms.

Precios

Todos los planes se billed annually.

  • Gratis: $0/mes.
  • Esencial: $8.33/month.
  • Premium: $12.99/month.
  • Profesional: $24.99/month.
GPTZero Pricing

Pros

  • Highly accurate.
  • Interfaz fácil de usar.
  • Comprehensive features.
  • Constant updates.
  • Supports educators.

Contras

  • Paid plans are needed.
  • Limited language support
  • Potential false negatives.
  • Relies on technology.

2. Originality AI (⭐4.5)

Originality AI is another strong AI content detector.

It also checks for plagiarism, making it a comprehensive tool for content creators and publishers.

It’s built to help maintain content integrity.

Unlock its potential with our Originality AI tutorial. 

Originality AI Introduction

Nuestra opinión

Originality AI

Ready to ensure your content is 100% human-generated? Originality AI boasts a 94% accuracy rate in detecting AI-written text. Don’t risk your reputation – Go for Originality AI today!

Principales ventajas

  • Precisión: Boasts 98-100% accuracy.
  • False Positives: Has a very low false positive rate, around 2%.
  • Warranty: Provides a 7-day satisfaction guarantee.
  • Características: Detects AI-generated and AI-edited content, includes a powerful plagiarism checker, scans entire websites, supports detection in multiple languages, offers an API for custom integrations.

Precios

  • Pro: $12.95/month.
  • Pay-as-you-go: $30 (One time on demand pricing).
  • Empresa: $136.58/month.
Originality AI Pricing

Pros

  • High accuracy rate.
  • Interfaz fácil de usar.
  • Precios asequibles.
  • Helpful Chrome extension.
  • Website scanning feature.

Contras

  • Occasional false positives.
  • Soporte lingüístico limitado.
  • No API access.
  • Can be slow at times.

3. QuillBot (⭐4.0)

QuillBot is an AI-powered writing tool.

It helps you rephrase sentences, check grammar, and even summarize text.

It’s like having a writing assistant that helps you improve your clarity and style.

Libere su potencial con nuestro QuillBot tutorial.

Quillbot Introduction

Nuestra opinión

Quillbot

Ready to transform your writing? Over 50 million users have already experienced Quillbot’s powerful paraphrasing capabilities. Explore it now!

Principales ventajas

  • Precisión: Achieves around 90% accuracy for general AI detection.
  • False Positives: Known for a reasonable false positive rate, typically under 5%.
  • Warranty: Offers a 3-day money-back guarantee on premium plans.
  • Características: Distinguishes AI-generated from AI-assisted human text, integrated with paraphrasing and grammar tools, offers free scans for shorter texts, provides detailed analysis reports, easy to use interface.

Precios

Todos los planes se billed annually.

  • Gratis: $0/mes.
  • Premium: $4.17/month.
  • Team Plan: Custom pricing based on your needs.
Quillbot Pricing

Pros

  • User-friendly.
  • Versatile features.
  • Time-saving.
  • Mejora la escritura.
  • Analysis reports.

Contras

  • Can produce awkward phrasing.
  • Free version limitations.
  • Shouldn’t be solely relied upon.
  • Cost of premium subscription.

4. Winston AI (⭐3.8)

Winston AI is an advanced AI content and plagiarism detector.

It’s designed to give you a clear picture of whether content is original or if it came from an AI.

It’s a reliable tool for ensuring authenticity.

Unlock its potential with our Winston AI tutorial.

Winston AI Introduction

Nuestra opinión

Winston AI

Over 10,000 writers trust Winston AI. Explore it today and see why it’s the go-to tool for streamlining content creation!

Principales ventajas

  • Precisión: Claims an impressive 99.98% accuracy.
  • False Positives: Reports a near-zero false positive rate.
  • Warranty: Includes a 14-day refund policy.
  • Características: Detects AI content from various models like GPT-4o and Gemini, includes an optical character recognition (OCR) feature, offers AI image detection, provides batch processing for bulk checks, has a clean, intuitive design.

Precios

  • Gratis: $0/mes.
  • Esencial: $10/month.
  • Avanzado: $16/month.
  • Elite: $26/month.
Winston AI Pricing

Pros

  • Accurate AI Detection.
  • User-Friendly.
  • Comprehensive Analysis.
  • Versatile options.
  • Integrates with AI Tools.

Contras

  • Pricing for Advanced Features.
  • AI Detection Challenges.
  • Limited Language Support.
  • Occasional False Positives.

5. Smodin (⭐3.5)

Smodin is a versatile AI writing and detection platform.

It offers tools for content creation, rewriting, and checking for AI-generated text and plagiarism.

It’s a comprehensive suite for various writing tasks.

Unlock its potential with our Smodin tutorial.

Smodin Introduction

Nuestra opinión

Smodin

Ready to supercharge your content creation? Over 100,000 users have already tried Smodin. Join them and see how Smodin can help you write faster and wiser!

Principales ventajas

  • Precisión: Provides around 95% accuracy for AI content.
  • False Positives: Has a low false positive rate, typically 3-4%.
  • Warranty: No specific warranty mentioned; relies on subscription terms.
  • Características: Combines AI detection with plagiarism checking, supports multiple languages, offers a content rewriter tool, includes a citation generator, good for academic and research papers.

Precios

Todos los planes se billed annually.

  • Writing: $9/month.
  • Reviewing: $15/month.
  • Lo último en: $18/month.
Smodin Pricing

Pros

  • Fast content creation.
  • Interfaz fácil de usar.
  • Comprehensive Analysis.
  • Planes de precios asequibles.
  • Helpful AI tools.

Contras

  • Pricing for Advanced Features.
  • AI writing quality.
  • Plan gratuito limitado.
  • Accuracy of AI.

6. Quetext (⭐3.3)

Quetext is primarily a plagiarism checker.

It helps writers and educators ensure the originality of their work by scanning against a vast database.

It’s straightforward and effective for maintaining academic integrity.

Unlock its potential with our Quetext tutorial.

Quetext Introduction

Nuestra opinión

Quetext CTA

Over 95% of users in our study found Quetext’s plagiarism detection more accurate than other tools. Ready to create content with confidence? Explore its advanced AI features!

Principales ventajas

  • Precisión: Delivers approximately 92% accuracy in AI detection.
  • False Positives: Maintains a low false positive rate, around 4%.
  • Warranty: No explicit warranty; focuses on subscription service.
  • Características: Uses “DeepSearch” technology for thorough analysis, highlights both AI and plagiarized content, offers a clear, color-coded report, provides a citation assistant, good for academic and journalistic integrity.

Precios

All the plans will billed annually.

  • Gratis: $0/mes.
  • Empresa: $11.99/month.
  • Esencial: $13.99/month.
Quetext Pricing

Pros

  • Highly accurate detection.
  • Simple, easy interface.
  • Advanced AI checks.
  • Fast citation tool.
  • Detailed & clear reports.

Contras

  • Limited free features.
  • Premium Plans are costly. 
  • Slow, large files.
  • Rare false alarms.

7. Undetectable (⭐3.2)

Undetectable is an AI content humanizer and detector.

It aims to make AI-generated text sound more natural and human-like, and it can also detect if content was produced by AI.

It’s useful for refining AI output.

Unlock its potential with our Undetectable tutorial.

Undetectable AI Introduction

Nuestra opinión

Undetectable AI

Give Undetectable AI a try! It bypasses 98% of AI content detectors, ensuring your AI-generated text goes undetected. Explore it today!

Principales ventajas

  • Precisión: Offers up to 90% accuracy in detecting AI.
  • False Positives: Claims a low false positive rate, about 5%.
  • Warranty: No specific warranty; subscription-based.
  • Características: Focuses on humanizing AI-generated content, checks against various AI detectors, aims to bypass common AI filters, useful for SEO and content marketing, simple and straightforward interface.

Precios

  • Yearly: $5/month.
  • Monthly: $19.00/month.
  • For Empresas: Custom pricing based on your needs.
Undetectable AI Pricing

Pros

  • Bypasses AI detectors.
  • Mejora la calidad de los contenidos.
  • Saves time.
  • Fácil de usar.
  • Works with various AI writing tools.

Contras

  • Not foolproof.
  • Raises ethical concerns.
  • Can be costly.
  • Risk of over-reliance on AI.

8. Phrasly AI (⭐3.0)

Phrasly AI is an AI paraphrasing and content improvement tool.

It helps users rephrase content to make it more unique or to improve its clarity and flow.

It’s great for refreshing existing text.

Unlock its potential with our Phrasly AI tutorial.

Phrasly AI Introduction

Nuestra opinión

Phrasly AI

Want to know if Phrasly AI can truly beat AI detectors? Discover if its 99.99% human content claim is real, explore it today!

Principales ventajas

  • Precisión: Provides around 88-90% accuracy for AI detection.
  • False Positives: Reports a moderate false positive rate, around 6%.
  • Warranty: Not explicitly stated; service is subscription-based.
  • Características: Specializes in making AI content undetectable, offers an AI rewriter, provides readability scores, quick and easy to use, aims to help content rank better.

Precios

  • Gratis: $0/mes.
  • Ilimitado: $12.99/month.
Phrasly AI Pricing

Pros

  • Accurate AI Detection.
  • Effective AI Detection Bypass.
  • Interfaz fácil de usar
  • Comprehensive Analysis.
  • Versatile options.

Contras

  • Costly for Advanced Features.
  • Detection Challenges.
  • Limited Support.
  • Occasional errors.

9. Grammarly (⭐2.8)

Grammarly is a widely used writing assistant.

It helps with grammar, spelling, punctuation, clarity, and more.

It’s a comprehensive tool for improving written communication across various platforms.

Libere su potencial con nuestro Tutorial de Grammarly.

Grammarly Introduction

Nuestra opinión

Grammarly CTA

Want expert-level writing? Grammarly Premium’s plagiarism checker scans 16+ billion web pages, ensuring originality. Explore it today!

Principales ventajas

  • Precisión: Offers strong AI detection, often around 90-92%.
  • False Positives: Maintains a low false positive rate, generally under 5%.
  • Warranty: Standard subscription terms apply, no specific warranty.
  • Características: Integrates AI detection with grammar and spelling checks, provides plagiarism detection, offers real-time feedback, available as a browser extension, helps improve overall writing quality.

Precios

Todos los planes se billed annually.

  • Gratis: $0/mes.
  • Pro: $12/month
  • Empresa: Custom pricing based on your needs.
Grammarly Pricing

Pros

  • Captura muchos errores.
  • Fácil de usar.
  • Funciona en todas partes.
  • Mejora la escritura.
  • Genera confianza.

Contras

  • Puede resultar caro.
  • No siempre es perfecto.
  • Puede corregir en exceso.
  • Versión gratuita limitada.

What to Look For in an AI Detector for Teachers?

  • Precisión: Does it consistently and reliably identify AI-generated content? Look for high accuracy rates in reviews and independent tests.
  • Facilidad de uso: Is the interface intuitive? Can you easily upload or paste text for analysis? The best tools save you time, not create more work.
  • Precios: Does it fit your budget? While some tools are free, others offer more features at a cost. Consider the value you’re getting for your money.
  • False Positives: How often does it mistakenly flag human-written text as AI-generated? This can be frustrating & lead to unnecessary conflict with students.
  • Additional Features: Does it offer plagiarism detection, grammar checks, or other helpful tools for educators? Some platforms provide a suite of features beyond just AI detection.
  • Educational Discounts: Some companies offer special pricing for educators. Be sure to inquire about any discounts that may be available.

How Can AI Detectors Benefit Teachers?

AI detectors are more than just cheat-catchers. They empower teachers to foster academic integrity while adapting to the evolving landscape of education.

By quickly identifying AI-generated content, teachers can engage in meaningful conversations with students about the responsible use of Herramientas de IA.

These detectors also save valuable time, freeing educators to focus on providing personalized feedback and creating engaging learning experiences.

Additionally, AI detectors help level the playing field, ensuring that all students are assessed fairly based on their knowledge and skills.

In the long run, these tools contribute to a more honest and authentic learning environment where students are encouraged to develop critical thinking & original ideas.

Guía del comprador

To determine the best AI detector for teachers, we conducted our research by focusing on several key factors.

Our methodology involved a systematic approach to evaluate various AI detection tools available in the market.

Here’s how we conducted our research:

  • Initial Keyword Search: We began by performing extensive searches using terms like “AI detection tool,” “AI detection tools,” “AI checker,” “detection tools,” “AI content detection tools,” “AI checker tool,” “best AI detection tools,” and “detection tool” to identify a broad range of potential products.
  • Feature Analysis: For each identified AI detection tool, we meticulously analyzed its features. This included looking for functionalities specifically beneficial for educators, such as integration with learning management systems, AI writing tools, plagiarism checking capabilities beyond AI detection, and ease of use for teachers and students. We also considered features related to “AI writing, AI writing tool” and “detecting AI writing” to ensure comprehensive coverage.
  • Pricing Comparison: We investigated the “pricing” of each product, comparing different subscription models, free trials, and educational discounts to assess their cost-effectiveness for teachers and institutions.
  • Identification of Negatives: We critically examined what was “missing” from each product. This involved identifying limitations in accuracy, types of AI-generated content they could detect, or user interface issues.
  • Support and Refund Policy Review: We thoroughly researched the “support or refund” policies of each provider. This included looking for the availability of customer support, community forums, tutorials, and clear refund policies to ensure teachers would have adequate assistance and recourse if needed. We also considered how these tools aligned with broader “AI technologies” in education.

Through this comprehensive process, we aimed to provide a well-rounded and reliable guide for teachers seeking the most effective AI detection solutions.

Conclusión

Navigating the world of AI-generated content can feel like a maze.

But with the right AI detector tool, teachers can stay ahead of the curve.

By understanding the features, pros, & cons of different tools, you can confidently choose the one that best suits your needs.

And helps you detect AI-generated content effectively.

Remember, the goal isn’t just to catch cheating but to foster a learning environment where students develop critical thinking and authentic expression.

With the help of a reliable AI detector, you can empower students to create original work while maintaining academic integrity.

Preguntas frecuentes

Are AI detectors accurate in identifying AI-written content?

Yes, but accuracy varies across tools and AI models. Reputable AI detectors often boast high accuracy rates, but it’s essential to remember that AI technology is constantly evolving.

Can students bypass AI detectors?

While some students might try to manipulate AI-generated text to avoid detection, advanced detectors are continuously updated to recognize such attempts.

Should I solely rely on AI detectors to assess student work?

No, AI detectors should be used as one tool among many. Combine them with your expertise, classroom discussions, and other assessment methods for a comprehensive evaluation.

Are there free AI detectors available for teachers?

Yes, several free AI detectors, like GPTZero, are available. However, paid options often offer more advanced features and higher accuracy.

How do AI detectors impact the learning environment?

AI detectors can foster academic integrity and encourage students to develop their own critical thinking & writing skills. They can also help teachers identify areas where students might need additional support.