9 Best GPTZero Alternatives: Top AI Detectors in 2025

à propos | Last updated Nov 25, 2025

Meilleur dans l'ensemble
Copyleaks logo
4.5
  • AI, plagiarism check
  • 30+ languages
  • 99% accuracy
  • AI Logic insights
  • API, LMS integration
  • Essai gratuit disponible
  • Paid Plans from $13.99
Meilleur rapport qualité/prix
Originality.ai
4.5
  • AI Detection
  • Vérificateur de plagiat
  • Extension Chrome
  • Accurate AI
  • Website Scanner
  • Essai gratuit disponible
  • Paid Plans from $12.95
Le plus en vedette
QuillBot
4.0
  • The Paraphraser
  • Vérificateur de grammaire
  • Summarizer
  • Co-Writer
  • Quillbot Keyboard
  • Plan gratuit disponible
  • Paid Plans from $4.17
GPTZero Alternatives

Is GPTZero letting you down? Let’s be honest.

This tool can be frustrating. It often flags human texte as AI.

This is called a false positive. You might also miss actual AI content.

This double-checking wastes your time. It makes your job much harder.

You need a reliable tool you can trust every single time.

Stop stressing over inaccurate results. We tested the top options for you.

This guide has the 9 best GPTZero Alternatives that offers better accuracy and smarter checks.

Find the perfect AI detector for your needs today.

What Are the Best GPTZero Alternatives?

We know you need a dependable AI checker.

The market has many options, but which ones actually work?

We looked at accuracy, ease of use, and price. We picked only the most reliable tools.

Our list below shows the best alternatives you can use right now.

1. Copyleaks (⭐4.8)

This tool is super accurate.

It helps you find AI text even when it’s mixed with human writing.

Copyleaks checks content in over 30 languages.

It gives you a clear report that shows the parts that look like AI.

Copyleaks

Notre avis

Copyleaks

The rating is high because of its strong accuracy claims (over 99%) and its low false positive rate (only 0.2%). The combination of AI and plagiarism detection in one tool is also a big plus. It loses points mainly due to the premium price tag.

Principaux avantages

Copyleaks has some great, unique features. It helps keep your work safe and honest.

  • It claims over 99% accuracy in its internal testing.
  • It has an incredibly low 0.2% false positive rate, which means it rarely flags human work by mistake.
  • The tool checks for AI content in over 30 languages.
  • It offers a unique feature called AI Logic that explains pourquoi the content was flagged.
  • It includes AI Image Detection and can check for source code plagiarism.
Vidéo YouTube

Tarifs

  • Personnel: $13.99/month.
  • Pro: $74.99/month.
Copyleaks

Avantages

  • High accuracy, over 99% claimed.
  • Checks AI and plagiarism together.
  • Supports detection in 30+ languages.
  • Very low 0.2% false positive rate.

Inconvénients

  • Premium pricing can be costly.
  • Accuracy drops for edited AI text.
  • The free version is very limited.

2. Originality AI (⭐4.5)

Originality AI is focused on creators and marketers.

It tells you the exact probability that your text is AI-generated or human-written.

This tool can also check for plagiarism. It has a low false-positive rate among educators.

You can start with a free trial. You then buy credits based on how many scans you faire.

Originality AI Introduction

Notre avis

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!

Principaux avantages

  • Précision: Boasts 98-100% accuracy.
  • Faux positifs : Has a very low false positive rate, around 2%.
  • Garantie: Provides a 7-day satisfaction guarantee.
  • Caractéristiques: 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.

Tarifs

  • Pro: 12,95 $/mois.
  • Paiement à l'utilisation : $30 (One time on demand pricing).
  • Entreprise: $136.58/month.
Originality AI Pricing

Avantages

  • High accuracy rate.
  • Interface facile à utiliser.
  • Prix ​​abordables.
  • Helpful Chrome extension.
  • Website scanning feature.

Inconvénients

  • Occasional false positives.
  • Soutien linguistique limité.
  • No API access.
  • Peut être lent parfois.

3. QuillBot (⭐4.0)

You probably know QuillBot for fixing and rewording text.

But it also has a great AI detector. The tool is very simple to use.

Just paste your text to get a score right away. It is free for basic checks.

This makes it a fast and easy option when you are in a hurry.

Présentation de Quillbot

Notre avis

Quillbot

Prêt à transformer votre écriture ? Plus de 50 millions d’utilisateurs ont déjà testé les puissantes capacités de paraphrase de Quillbot. Découvrez-les dès maintenant !

Principaux avantages

  • Précision: Atteint une précision d'environ 90 % pour la détection générale de l'IA.
  • Faux positifs : Connu pour un taux de faux positifs raisonnable, généralement inférieur à 5 %.
  • Garantie: Offre une garantie de remboursement de 3 jours sur les forfaits premium.
  • Caractéristiques: Distingue le texte généré par l'IA du texte humain assisté par l'IA, intégré aux outils de paraphrase et de grammaire, propose des analyses gratuites pour les textes plus courts, fournit des rapports d'analyse détaillés, une interface facile à utiliser.

Tarifs

Tous les plans seront facturé annuellement.

  • Gratuit: 0$/mois.
  • Prime: 4,17 $/mois.
  • Plan d'équipe : Tarification personnalisée en fonction de vos besoins.
Quillbot

Avantages

  • Convivial.
  • Fonctionnalités polyvalentes.
  • Gain de temps.
  • Améliore l'écriture.
  • Rapports d'analyse.

Inconvénients

  • Peut produire une formulation maladroite.
  • Limitations de la version gratuite.
  • Il ne faut pas s'y fier uniquement.
  • Coût de l'abonnement premium.

4. Winston AI (⭐3.8)

Winston AI claims super high accuracy. It is built for écoles and publishers.

This tool gives your text a “Human Score.”

It uses color-coding to show what parts are predictable.

Note that it works best with documents over 600 characters.

It also offers a plagiarism check if you upgrade.

Winston AI Introduction

Notre avis

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!

Principaux avantages

  • Précision: Claims an impressive 99.98% accuracy.
  • Faux positifs : Reports a near-zero false positive rate.
  • Garantie: Includes a 14-day refund policy.
  • Caractéristiques: 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.
Vidéo YouTube

Tarifs

  • Gratuit: 0$/mois.
  • Essentiel: 10$/mois.
  • Avancé: $16/month.
  • Elite: $26/month.
Winston AI Pricing

Avantages

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

Inconvénients

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

5. Smodin (⭐3.5)

Smodin is a whole set of writing tools.

The AI detector checks content down to the sentence level.

It also has a special feature. You can use it to rewrite AI text to sound more human.

Smodin is used by millions worldwide.

It aims to help you detect AI and avoid penalties.

Smodin Introduction

Notre avis

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!

Principaux avantages

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

Tarifs

Tous les plans seront facturé annuellement.

  • Writing: 9$/mois.
  • Reviewing: 15$/mois.
  • Ultime: $18/month.
Smodin Pricing

Avantages

  • Fast content creation.
  • Interface facile à utiliser.
  • Comprehensive Analysis.
  • Des plans tarifaires abordables.
  • Helpful AI tools.

Inconvénients

  • Pricing for Advanced Features.
  • AI writing quality.
  • Plan gratuit limité.
  • Accuracy of AI.

6. Quetext (⭐3.2)

Quetext is a popular plagiarism checker.

It uses its own DeepSearch™ technology.

This technology finds all kinds of copying, even if you reword the text a little.

It uses AI to do these detailed checks. Quetext is simple to use.

It gives a clear, side-by-side view of matched sources.

Quetext Introduction

Notre avis

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!

Principaux avantages

  • Précision: Delivers approximately 92% accuracy in AI detection.
  • Faux positifs : Maintains a low false positive rate, around 4%.
  • Garantie: No explicit warranty; focuses on subscription service.
  • Caractéristiques: 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.
Vidéo YouTube

Tarifs

Tous les plans seront facturé annuellement.

  • Gratuit: 0$/mois.
  • Entreprise: 11,99 $/mois.
  • Essentiel: $13.99/month.
Quetext Pricing

Avantages

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

Inconvénients

  • Fonctionnalités gratuites limitées.
  • Premium Plans are costly. 
  • Slow, large files.
  • Rare false alarms.

7. Undetectable (⭐3.0)

This tool is mostly an AI Humanizer.

It takes AI-written content and tries to make it sound human.

The goal is to bypass other AI detectors. It is easy to use and processes text fast.

However, you should always check the quality.

Sometimes the rewritten text needs more fixing.

Undetectable AI Introduction

Notre avis

IA indétectable

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

Principaux avantages

  • Précision: Offers up to 90% accuracy in detecting AI.
  • Faux positifs : Claims a low false positive rate, about 5%.
  • Garantie: No specific warranty; subscription-based.
  • Caractéristiques: 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.
Vidéo YouTube

Tarifs

  • Yearly: 5$/mois.
  • Mensuel: $19.00/month.
  • For Entreprise: Tarification personnalisée en fonction de vos besoins.
Undetectable AI Pricing

Avantages

  • Bypasses AI detectors.
  • Améliore la qualité du contenu.
  • Permet de gagner du temps.
  • Facile à utiliser.
  • Works with various AI writing tools.

Inconvénients

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

8. Phrasly AI (⭐2.8)

Phrasly AI also has an AI Humanizer feature.

Its goal is to make AI text look totally human.

It claims a very high detection accuracy rate for its own scanner.

This tool is built to streamline your workflow.

It is a good choice if you write and then want to polish your content in one spot.

Phrasly AI Introduction

Notre avis

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!

Principaux avantages

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

Tarifs

  • Gratuit: 0$/mois.
  • Illimité: 12,99 $/mois.
Phrasly AI Pricing

Avantages

  • Accurate AI Detection.
  • Effective AI Detection Bypass.
  • Interface conviviale
  • Comprehensive Analysis.
  • Versatile options.

Inconvénients

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

9. Grammarly (⭐2.5)

Grammarly is the tool everyone knows for fixing grammar.

Now it has an AI Detector, too.

It tells you what percentage of your writing seems AI-generated.

This is great because it works right inside Google Docs or Word.

It is perfect for getting an easy second opinion as you write.

Introduction à Grammarly

Notre avis

Appel à l'action de Grammarly

Envie d'une rédaction de niveau expert ? Le détecteur de plagiat de Grammarly Premium analyse plus de 16 milliards de pages web pour garantir leur originalité. Découvrez-le dès aujourd'hui !

Principaux avantages

  • Précision: Offre une détection d'IA puissante, souvent autour de 90 à 92 %.
  • Faux positifs : Maintient un faible taux de faux positifs, généralement inférieur à 5 %.
  • Garantie: Les conditions d'abonnement standard s'appliquent, aucune garantie spécifique.
  • Caractéristiques: Intègre la détection de l'IA avec les vérifications de grammaire et d'orthographe, fournit une détection de plagiat, offre des commentaires en temps réel, disponible sous forme d'extension de navigateur, aide à améliorer la qualité globale de l'écriture.

Tarifs

Tous les plans seront facturé annuellement.

  • Gratuit: 0$/mois.
  • Pro: 12 $/mois
  • Entreprise: Tarification personnalisée en fonction de vos besoins.
Tarifs de Grammarly

Avantages

  • Détecte de nombreuses erreurs.
  • Facile à utiliser.
  • Fonctionne partout.
  • Améliore l'écriture.
  • Renforce la confiance.

Inconvénients

  • Can be expensive.
  • Pas toujours parfait.
  • Peut surcorriger.
  • Version gratuite limitée.

Guide d'achat

When doing our research to find the best AI detector, we determined it using these factors:

  • Accuracy and Reliability: We tested how well each of the so many ai detectors could identify ai generated text. This included checking if the AI detection tools could truly detect AI-generated content and detect AI content from multiple models. We focused on the most accurate AI detectors that use advanced algorithms and look for AI patterns in machine-written text. Our goal was to find precise Outils d'IA that provide accurate results and the best AI detection tools against all forms of generated text. We also looked closely at the performance of the Sapling AI detector and other advanced AI models.
  • Features and Capabilities: Beyond basic AI text detection, we checked the key features and advanced features. Could the AI tools offer a generous free version or free plan? We assessed Quillbot’s AI detector for its unique benefits. We also looked for plagiarism detection and writing feedback, and whether the detection tools included a browser extension or integrated with other tools, like image générateurs, to be a comprehensive tool and our new go-to tool. We wanted helpful features that let users easily check the same text.
  • Expérience utilisateur (UX): A tool must have a user-friendly interface and be easy to use. We checked whether finding the source of AI-generated text could be done in just a few clicks. We evaluated features relevant to educational institutions and professional environments, such as Google Classroom integration and the ability to check étudiant assignments or verify academic papers. The tool needed to save time for content creation teams.
  • Pricing Structure: We analyzed the different pricing plans, including the cost of the essential plan, professional plan, and premium plan. We considered the value offered by the paid plan versus the functionality of the free version.
  • Ethical AI Use: Finally, we ensured the tools support the ethical use of AI models. We tested their ability to distinguish between human-written content and AI-generated content to protect human-written text. Our focus was on promoting ethical AI practices by recommending accurate AI detectors. We also looked at features that could improve the writing style of generated text.

Pour conclure

Finding the right AI detector tools can feel tough. We know that.

We reviewed the top choices so you don’t have to guess.

Tools like Copyleaks offer strong AI content detection.

Others give you more advanced tools for rewriting.

The best choice really depends on what you need it for.

We tested these tools deeply to give you honest advice.

Trust our research. Pick one of these alternatives today.

You will get more accurate results and save a lot of time.

Questions fréquemment posées

Which GPTZero alternative is the most accurate?

The most accurate alternative is Copyleaks. It uses advanced technology to detect all forms of AI-generated text. It is very good at spotting mixed or edited content.

Do these AI detectors also check for plagiarism?

Yes, many of the top options include plagiarism checking. Originality AI and Quetext are known for their dual features. This saves you time and effort.

Can I use a GPTZero alternative for free?

Absolutely. Tools like Grammarly and QuillBot offer a good free plan for basic detection. For more scans or advanced features, you will need a paid plan.

Are these tools good for teachers and students?

Yes, tools like Winston AI are built for educational institutions. They help enseignants easily check student assignments for AI-generated content.

How do I choose the best AI detector for my needs?

Consider what you mainly write. If you need speed, use QuillBot. If you need deep reports for publishing, choose Originality AI or Copyleaks.

Fahim Joharder

Fahim Joharder

Passionné de technologie, entrepreneur, voyageur et expatrié de Médine, en Arabie saoudite.

Divulgation d'affiliation :

Nous sommes soutenus par nos lecteurs. Nous pouvons gagner un filiale Лучший общий рейтинг: 4,8 Лучшая цена: 4,5 Самый популярный рейтинг: 4,0 Устали от неудобного учёта времени? Хотели бы вы иметь более простой способ управления своим временем? Timeular популярен, но это не единственный вариант. Что, если бы вы нашли инструмент, который соответствует вашим потребностям?

Nos avis sont rédigés par des experts et proviennent d'une expérience concrète. Consultez notre Lignes Directrices Sur La Rédaction et Politique De Confidentialité

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