Dealing with AI detectors is now a problem for every 作家.
You use a tool to help you write, but your work gets flagged.
It is frustrating to write something only to have a program say it is not human.
This agitation costs you time, money, and your reputation.
You need content that sounds like a person wrote it—every single time.
So, what is the solution?
We found the 9 best Undetectable AI alternatives for 2025.
This list will give you tools that beat the detectors and get you back to work.
What is the Best Undetectable AI Alternative?
It is hard to find tools that truly work.
Many AI rewriters get flagged by smart detectors.
You want content that sounds natural, not robotic.
We have done the hard work for you.
Below is a list of the 9 best undetectable AI alternatives.
These tools can help your 제니 vs 라이트소닉: 2025년 최고의 AI 작가 7 pass as 100% human-written content every time.
1. GPTZero (⭐4.8)
GPTZero is a leading AI detector. Wait, what?
Yes, it mainly finds AI content. But think of it as your final quality check.
If your text passes their tough test, it is very safe.
主なメリット
- 正確さ： Offers 99% accuracy for AI detection.
- 誤検知: Claims a very low false positive rate (less than 1%).
- 保証： Comes with a 30-day money-back guarantee.
- Features: Focuses on perplexity and burstiness, user-friendly interface, supports multiple file uploads, offers batch processing for many documents, integrates with learning platforms.
価格
すべての計画は 毎年請求されます。
- Free: 月額0ドル。
- 不可欠： 月額8.33ドル。
- プレミアム: 月額12.99ドル。
- Professional: $24.99/month.
長所
短所
2. Originality AI (⭐4.5)
This tool is super strict. It is known for its high accuracy in detecting AI.
We listed it because it’s tough. AI check shows you how to make your content undetectable.
It keeps getting better at finding human-written text.
私たちの見解
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!
主なメリット
- 正確さ： Boasts 98-100% accuracy.
- 誤検知: Has a very low false positive rate, around 2%.
- 保証： Provides a 7-day satisfaction guarantee.
- Features: 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.
価格
- Pro: 月額12.95ドル。
- 従量課金制: $30 (One time on demand pricing).
- 企業： $136.58/month.
長所
短所
3. QuillBot (⭐4.0)
QuillBot is great for paraphrasing.
You can use it to reword text that sounds too robotic.
This improves your content flow and breaks those predictable AI patterns.
It is a good first step to humanize your writing.
私たちの見解
文章を劇的に変える準備はできていますか？5,000万人以上のユーザーがQuillbotの強力なパラフレーズ機能をすでに体験しています。今すぐお試しください！
主なメリット
- 正確さ： 一般的な AI 検出で約 90% の精度を実現します。
- 誤検知: 誤検出率が妥当であることで知られており、通常は 5% 未満です。
- 保証： プレミアムプランには 3 日間の返金保証が付いています。
- Features: AI 生成テキストと AI 支援人間テキストを区別し、言い換えおよび文法ツールを統合し、短いテキストの無料スキャンを提供し、詳細な分析レポートと使いやすいインターフェースを提供します。
価格
すべての計画は 毎年請求されます。
- Free: 月額0ドル。
- プレミアム: 月額4.17ドル。
- チームプラン: ニーズに応じて価格をカスタマイズします。
長所
短所
4. Copyleaks (⭐3.8)
Copyleaks is a complete content integrity platform.
It checks for AI and plagiarism in many languages.
They even have a “humanizer” feature now.
This helps your AI text bypass their own strong detection system.
主なメリット
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 なぜ the content was flagged.
- It includes AI Image Detection and can check for source code plagiarism.
価格
- 個人的： $13.99/month.
- Pro: $74.99/month.
長所
短所
5. Smodin (⭐3.5)
Smodin has a cool feature called AI Detection Removal.
This tool claims to rewrite AI content to make it sound human.
It uses different models to change the predictable structure of machine writing.
You can try it for free first.
主なメリット
- 正確さ： Provides around 95% accuracy for AI content.
- 誤検知: Has a low false positive rate, typically 3-4%.
- 保証： No specific warranty mentioned; relies on subscription terms.
- Features: Combines AI detection with plagiarism checking, supports multiple languages, offers a content rewriter tool, includes a citation generator, good for academic and research papers.
価格
すべての計画は 毎年請求されます。
- Writing: 月額9ドル。
- Reviewing: 月額15ドル。
- Ultimate: $18/month.
長所
短所
6. Quetext (⭐3.3)
Quetext is mainly a plagiarism チェッカー.
But many undetectable tools claim they can bypass its checks.
This makes Quetext a good place to test your content’s “human” score.
If it passes, you are in a good spot.
主なメリット
- 正確さ： Delivers approximately 92% accuracy in AI detection.
- 誤検知: Maintains a low false positive rate, around 4%.
- 保証： No explicit warranty; focuses on subscription service.
- Features: 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.
価格
すべての計画は 毎年請求されます。
- Free: 月額0ドル。
- Enterprise: $11.99/month.
- 不可欠： $13.99/month.
長所
短所
7. Winston (⭐3.2)
Winston is a very accurate AI detector.
Like GPTZero, it is on this list because it is a great test.
If your humanized content can trick Winston, it can probably trick most other detectors, too.
It has a high 99% accuracy rate.
主なメリット
- 正確さ： Claims an impressive 99.98% accuracy.
- 誤検知: Reports a near-zero false positive rate.
- 保証： Includes a 14-day refund policy.
- Features: 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.
価格
- Free: 月額0ドル。
- 不可欠： 月額10ドル。
- Advanced: $16/month.
- Elite: $26/month.
長所
短所
8. Phrasly AI (⭐3.0)
Phrasly is built to turn AI writing into human-like content.
Their AI Humanizer tool focuses on eliminating robotic text.
It works by changing the writing style and sentence variety.
This helps your text pass human authenticity checks.
主なメリット
- 正確さ： Provides around 88-90% accuracy for AI detection.
- 誤検知: Reports a moderate false positive rate, around 6%.
- 保証： Not explicitly stated; service is subscription-based.
- Features: Specializes in making AI content undetectable, offers an AI rewriter, provides readability scores, quick and easy to use, aims to help content rank better.
価格
- Free: 月額0ドル。
- Unlimited: 月額12.99ドル。
長所
短所
9. Grammarly (⭐2.8)
You probably Grammarlyを使用する already.
While it fixes grammar, its new AI Humanizer refines AI-generated text.
It makes the text clearer and more natural.
Remember, it is best to polish the text you already wrote.
私たちの見解
プロレベルの文章をお望みですか？Grammarly Premiumの剽窃チェッカーは160億以上のウェブページをスキャンし、オリジナリティを保証します。今すぐお試しください！
主なメリット
- 正確さ： 強力な AI 検出を提供し、多くの場合 90 ～ 92% 程度です。
- 誤検知: 低い誤検出率（通常は 5% 未満）を維持します。
- 保証： 標準のサブスクリプション条件が適用されますが、特定の保証はありません。
- Features: AI 検出を文法およびスペル チェックと統合し、盗作検出機能を提供し、リアルタイムのフィードバックを提供し、ブラウザー拡張機能として利用可能で、全体的な文章品質の向上に役立ちます。
価格
すべての計画は 毎年請求されます。
- Free: 月額0ドル。
- Pro: 月額12ドル
- 企業： ニーズに応じて価格をカスタマイズします。
長所
短所
バイヤーズガイド
When researching the 9 best undetectable AI alternatives, we used these factors to provide you with the most accurate review.
We focused on what truly matters to content writers and regular users who need to humanize AI text effectively.
- Detection Evasion Score: The most critical factor. We tested each tool against advanced AI detectors like Winston AI to see if the rewritten content could bypass AI detectors and AI content detectors. A high score here proves the tool transforms AI-generated text into human-like text that detection systems pick up as original.
- Built-in Features: We looked for unique and advanced features beyond basic rewriting. This included a built-in AI checker or built-in AI detector, different rewriting styles, and functions for specific needs like academic essays or social media キャプション.
- Readability & Natural Flow: It’s not enough to bypass AI detection. The final text must have a natural tone and natural flow, maintaining readability and the original meaning. We checked for sentence structure variety and intelligent word choice to ensure high-quality content.
- User Experience (UX): We evaluated the user-friendly interface, the simplicity of the input box, and how quickly the tool delivered the rewritten version. We looked at whether non-technical users could use the powerful tool easily.
- Pricing & Access: We compared the cost of the premium plan and the unlimited plan. We also checked if they offered a useful free plan or free version, as well as any word limit restrictions across their plans.
- これ 能力: Since most users create marketing copy or blog posts, we checked if the output was seo friendly content and helped avoid issues with spam filters.
- Core Technology: We looked at the AI models used, whether they were built in AI or used a specific advanced AI to ensure they could beat the latest detection algorithms and not just older models.
- 言語サポート: Does the great tool support multiple languages? This is a key feature for global content creation.
- Community & Support: Does the service offer good customer support or a clear refund policy? This matters when deciding between a paid plan and unlimited usage. We wanted to find the ultimate go-to tool that we would absolutely love.
まとめ
We know the fight against AI detection tools is real.
You are trying to create good content fast.
But getting flagged for AI-generated content stops your progress.
That is why we put together this list of the 9 best undetectable AI alternatives.
We tested these AIツール hard.
Our research found the best ways to get truly undetectable AI writing.
This guide gives you proven tools to bypass AI detectors and keep your writing human.
Now you have the best AI writing tool options for 2025.
Pick one, start writing, and see your content pass every time.
よくある質問
What makes these tools better than other tools?
These are designed to specifically rewrite text using more human-like patterns. They focus on beating popular ai detectors, not just simple rephrasing like other tools do.
Can I really bypass the popular ai detectors using these?
Many use advanced plans and algorithms to change specific words and structure. They are tested to bypass tools like GPTZero by changing the predictable writing habits of AI.
Do I need to buy advanced plans to get good results?
The basic or free plans let you rewrite text for short pieces. However, the advanced plans usually offer features to handle long content and guarantee passing popular ai detectors.
How should I adjust my writing habits when using an ai writing tool?
Do not just copy and paste. Use the ai writing tool for a first draft, then add personal thoughts and change specific words. This improves the text and passes detection.
Are there free versions of these tools?
Most of these offer a free trial or limited free version. These let you rewrite text up to a certain word count to test their ability to beat popular ai detectors before subscribing to advanced plans.
English 
Spanish 
Chinese 
German 
French 
Arabic 
Russian 
Portuguese 
Japanese 
Korean 
Italian 
Turkish 
Dutch 
Polish