Are you worried about content being flagged as AI-written?
Maybe Originality AI is not the right fit for you.
It is hard to find a tool that is both accurate & affordable.
Getting false positives or paying too much for checks can be frustrating.
You need assurance that your content is clean.
Stop guessing! We have found the top 9 best Originality AI alternatives for 2025.
These tools are fast, accurate, and cost-effective.
Read on to discover the perfect AI detection solution!
What are the Best Originality AI Alternatives?
It is tough to pick the right AI detector.
You want ai tools that works well. You also want a good price.
Do not waste time testing every tool yourself to see if it has an accurate detector.
We did the hard work for you.
Here is a list of the top 9 best Originality AI alternatives.
We ranked them by how well they work. Use this list to find the best tool for your needs today.
1. GPTZero (⭐️4.8)
GPTZero is a strong choice for checking if 제니 vs 라이트소닉: 2025년 최고의 AI 작가 7 is AI-written.
It is like a super smart detective. Teachers and students often trust this tool.
It can check for text from models like チャットGPT and Gemini.
GPTZero gives you a clear percentage score.
It even shows you which parts of the writing look like AI.
This makes it easy to know what to fix.
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.
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2. Copyleaks (⭐️4.5)
Copyleaks is a strong チェッカー. It is good for people who 作る content and for schools.
This tool can look for AI content and copied words at the same time.
You paste your writing and it quickly tells you what it finds.
It works in many languages, which is very helpful.
Copyleaks wants to keep all content real and honest.
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.
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3. QuillBot (⭐️4.クイルボット)
You might know QuillBot as a paraphrasing tool.
But it also has an AI detector. The detector looks for patterns typical of AI writing.
It gives you a score and highlights the sentences that seem AI-generated.
QuillBot is useful because it offers other writing help, too.
It is a good option if you need a mix of writing tools.
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。
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4. Winston AI (⭐️3.8)
Winston AI is praised for its high accuracy.
It does a great job distinguishing between human and AI writing.
Many people find it very reliable.
A cool feature is that it can scan not just text but also uploaded files like PDFs and images for AI-generated content.
It gives you a clear probability score for your work.
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.
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5. Phrasly AI (⭐️3.5)
Phrasly AI focuses on humanizing AI content.
It has a built-in AI detector. The tool claims to be highly accurate.
It gives you an overall score, plus checks for grammar and readability.
Phrasly AI is helpful if you use AIツール and want to clean up the content before publishing.
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。
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6. Smodin (⭐️3.2)
Smodin is a tool that offers many services.
It includes an AI detector and a tool to “humanize” AI text.
It can check content in many different languages.
Smodin’s detector does a decent job on completely AI-written text.
However, its accuracy can drop when the text mixes human and AI parts.
It’s a useful, affordable option with extra features.
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.
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7. Undetectable (⭐️3.0)
Undetectable tries to make AI-written text sound more human.
It also has an AI detector to check content.
The goal is to make AI content pass other detectors.
Reviews show that its results can be mixed. Sometimes the rewritten text can still get flagged.
But it is an option if you need to rephrase content quickly.
私たちの見解
Give Undetectable AI a try! It bypasses 98% of AI content detectors, ensuring your AI-generated text goes undetected. Explore it today!
主なメリット
- 正確さ： Offers up to 90% accuracy in detecting AI.
- 誤検知: Claims a low false positive rate, about 5%.
- 保証： No specific warranty; subscription-based.
- Features: 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.
価格
- Yearly: 月額5ドル。
- 毎月: $19.00/month.
- For 仕事: ニーズに応じて価格をカスタマイズします。
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8. Quetext (⭐️2.8)
Quetext is mostly known as a plagiarism checker.
But it also has an AI content detection feature. The tool is simple to use.
You paste your text to check it.
Quetext offers different plans, including a free one with a limited word count.
It is a good choice if your main worry is plagiarism and you need a basic AI check on the side.
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.
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9. Grammarly (⭐️2.5)
Grammarly is a very popular writing assistant.
It now includes an AI detector as a feature.
It is a brand many people already trust.
The detector gives a percentage indicating how AI-generated the text appears to be.
Grammarly is great if you want an AI check inside your main writing and editing tool.
But some tests show its AI detection isn’t always as strong as other dedicated tools.
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。
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バイヤーズガイド
When doing our research to find the best Originality AI alternatives, we determined the rankings and evaluations using these critical factors:
- 価格: We looked at the free version (or free plan), free trial, and the cost of paid plans for each AI detection tool.
- Accuracy and Features: We tested the AI detection capabilities to see how well they could detect AI-generated text and distinguish it from human-written content. This included checking for a low false-positive rate and evaluating key features such as a Chrome extension or browser extension, bulk file uploads, and integration with Google Docs.
- Scope of Detection: We assessed whether the AI checker could detect AI-generated content from the latest AI models and how it performed across different types of content, such as academic papers and general content creation. We also looked into whether the tool offered plagiarism detection or checking alongside the AI detection feature.
- User Experience and 報告: We evaluated the ease of use—how simple it was to paste text and get an AI score. We checked for detailed reports, feedback on writing style and sentence structure, and whether they offered API access.
- Tool Ecosystem: We considered whether the product was just an AI detector tool or one of the multiple detectors, or if it included plagiarism tools, an AI humanizer, or a grammar checker. We compared these against popular AI detectors and other AI detectors to ensure we found the top AI detectors.
- Reliability: We assessed how well these AI content detectors supported academic integrity by reviewing academic papers and conducting reliable AI usage checks. The goal was to find the accurate AI detectors that are truly essential tools for anyone dealing with generative AI and the challenge of detecting AI content.
- Negatives/Missing Elements: We noted what was missing from each AI writing tool and other tools, especially where most free tools failed to offer key features. We also looked for common problems, such as grammatical errors in their output or a lack of advanced features.
- サポート: We checked whether the companies offered support or a refund policy for their advanced tools for detecting text generated by AI models. This ensures users have support when dealing with AI-written content and need reliable detection tools.
- Comparisons: We compared each tool to Originality AI to determine why it ranked among the nine best Originality AI alternatives and whether it was better than the best AI.
まとめ
We have reviewed the nine best Originality AI alternatives.
Finding the right tool to detect AI text is very important today.
We showed you options from dedicated best AI detectors like GPTZero to multi-purpose tools like Grammarly.
The key is finding one that fits your budget and accuracy needs.
Remember, the best tool should help you protect your content.
It should clearly separate AI-generated content from human-written text.
Our guide focused on finding tools that offer solid AI detection and plagiarism checking together.
Trust our research to make your final choice easy and smart.
Pick your favorite and keep your content reliable!
よくある質問
Is Originality AI the only choice for AI detection?
No, there are many different tools available. Our list shows that alternatives like GPTZero and Winston AI offer great accuracy and strong features.
Do these AI detectors also offer grammar and style checks?
Some detectors, like Grammarly, are primarily focused on giving writing feedback. Other specialized tools may offer this as a secondary feature alongside detection.
Can these detection tools beat major search engines?
AI detection is constantly evolving to keep up with search engines and new AI models. The most advanced tools work hard to stay ahead in identifying AI-generated content.
Are there any good free AI detectors?
Yes, many popular tools offer a free tier or a limited free plan. This allows you to test their writing feedback and accuracy before committing to a paid subscription.
How accurate are the top AI detectors?
The best AI detectors are highly accurate, but no tool is perfect. They provide an AI score to estimate the likelihood of content being AI-generated, which is helpful for content creators and academic integrity
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