10 Best AI Content Detectors In 2025

As we are growing with the advanced technologies, it has become our inseparable part in the journey of life. AI has been an important support for the students and corporations since it came into the market. With each passing day AI is revolutionizing and there might be a day we’ll be totally dependent on it for our ease. It is said that AI might take over the humans, if it is not being used wisely.

As the use of AI is increasing rapidly, AI detectors are also taking place in the market. While both AI tools might have flaws so we need to use them wisely without being fully dependent on them. We have researched and collected some best AI content detectors for you, let’s learn about them.

Why Do We Need AI Content Detectors?

AI detectors mainly help us in detecting  transparency, integrity, and liability in a continuously  increasingly AI driven world. These days AI content can be created in seconds and therefore its tough to understand whether the content in front of you is AI generated or human written, AI detectors help us differentiate between human written and AI generated content, which is important in education, journalism, and other fields where originality and credibility matter. 

10 Best AI Content Detectors In 2025

1. Quillbot AI

Quillbot AI is popularly known for its paraphrasing and writing tools but its free AI detection is also doing wonders in the world of AI. You can just paste your text or upload a pdf to get it detected by Quillbot. The tool allows you to paste your text in English, French, Spanish, and German. 

Quillbot gives an approx percentage of text that might be AI generated and if the text is mixed with human written no problem, it also provides a breakdown of the result in AI-generated, AI-generated & AI-refined, human-written & AI-refined, and human-written. 

You don’t need to sign up, you can directly paste your text and get the result in seconds. Quillbot can scan a minimum of 80 words and maximum of 1200 words at a time in the free version. It also provides a premium version if you are not satisfied with the limitations of free version.

2. Sapling 

Sapling is one of the best free AI content detectors with high accuracy chances. It has an easy to use interface where you don’t need to sign up to use the AI detection tool. You can simply paste your text or upload the document and get the result in seconds. Sapling gives the result in percentage to show what percent of the text might be AI generated. 

Sapling also detects GPT 3.5 and GPT 4 content in a few seconds only with high accuracy rate among other tools. It combines AI detection with grammar and style improvement, and offers dual functionality. 

Sapling can detect algorithms for sectors like legal, healthcare, and marketing, where authenticity is important. Therefore, this is a great tool if you want to detect texts in seconds with high accuracy chances.

3. Crossplag

Crossplag is also a free AI content detector. It allows you to detect AI generated essays, research papers, and assignments in just a few seconds and also doesn’t need to be signed up. You just need to paste your text and get the result in seconds. 

Crossplag has a very low chance of accuracy in the result and also it doesn’t highlight the AI content that can confuse the user to find out the AI generated part of the content. But you can still use the use if you want  a quick and almost fair result. 

4. Originality.ai

Originality.ai is an AI content detector tool where you can check up to 2000 words at a time. You can directly paste your text, or URL to get the result. It also allows you to try samples including GPT4, Claude, and Human. 

Originality.ai gives results with high accuracy rates and on top of that it is very easy to use compared to other AI detectors. It can detect the texts of Chat GPT, GPT-4o, Gemini Pro, Claude 3.5, Llama 3.1 and other popular AI writing or paraphrasing tools.

5. Smodin

Smodin is a popular AI content detector but it is also known for its rewriting texts feature, plagiarism checker, text summarizer and more. You can even a mixed content and Smodin will filter the human written and AI generated texts in seconds with a high accuracy rate. 

In the free version Smodin allows to paste texts up to 5000 characters where you can either paste your text or add a doc or pdf to detect it. While it claims that the result may vary with languages and in comparison to other test results.

AI detection tools might not give the accurate percentage of AI generated texts. You can test them but can’t go with them with a blind eye. However, Smodin can also fail sometimes to give the accurate result. 

6. Turntin

Turntin is mostly used in Universities by professors and students to check the plagiarized or AI  generated content. You need to upload the document with a few information like region and title to get the result. 

Within a few minutes of uploading your document the tools gives you the result with a few details including similarity percentage, AI generated text’s percentage and other related details of the doc. It also highlights the content that is AI generated and then humanised by any AI content writer. Turntin is popularly known for its high accuracy rates in results. 

7. Winston AI

Winston AI integrates with ChatGPT, GPT-4o, Google Gemini and all known AI models. It provides a human report of the highlighted sections of text that are suspected to be human written. You can also get the plagiarism report of your content in only a few seconds with Winston AI. 

You can directly paste your content or add the link of your content to get the report of your text. The tool highlights the content focusing on three things including “Likely AI generated”, “Possibly AI generated”, “Unlikely AI generated” with three different colors. You can use the tool for free for only once but after that you’ll need to buy their upgrade plan to use the tool further.

8. Hive Moderation

Hive is also a well known free AI detection tool, but along with detecting texts it can also detect AI generated audios, videos and images. To get the report of your text’s AI detection you just need to paste the text, the text should have a minimum of 750 characters. 

It highlights the parts of the text that are supposed to be AI generated and gives the result in percentage. Hive has Chrome extension that lets you use multiple web pages at a time. You don’t need a premium plan to use the AI detection tool but its free to use. The platform is built for high volume works, it’s perfect for organizations who manage large datasets.

9. Zero

GPT Zero is an AI detector with an easy to use interface. It allows you to paste your text in minimum 250 and maximum 5000 characters or you can also upload a file of your content. It shows the result in three categories including Human, AI generated or mixed. You can aslo download the result in pdf file format.

The Basic Scan points out sentences that are probably created by AI. With Premium plans, you can use the Deep Scan, which uses colors to show which parts are written by AI and which are by humans. 

10. Surfer

Surfer is a free AI content detection tool, with an easy interface and quick results. It gives result in less than a second, also divides the result in two categories including AI generated and human written. You just need to paste the text that needs to have a minimum of 100 words.

The tool provides Essential, Scale and Enterprise plans for premium features. However the result Surfer provides cannot be claimed to be 100% accurate, it might have some false result so you can’t trust the tool fully for your content detection.

Conclusion

To conclude, we have explored the 10 best AI content detectors including Quillbot, Sapling, Crossplag, Originality.ai, Smodin, Turntin, Winston AI, Hive Moderation, GPT Zero and Surfer. All of the tools are great AI content detectors while we some gives the result we low accuracy rate. We have mentioned which of the tools have have high and which of them have low accuracy rates. Hope this article helps you to choose the best AI content detector.

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