I tried the best AI detector in 2025 on the market, here are my results.
Top picks
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How I will test them
I will test them using a paragraph from a book and also a couple of generated AI text, so let’s see if it’s able detect both of them correctly.
I’m going to ask to chatgpt to create a text with 500 words:
I will do the same for Gemini:
And I will also use the next paragraph from the book “1984” :
The hallway smelt of boiled cabbage and old rag mats. At one end of it a coloured poster, too large for indoor display, had been tacked to the wall. It depicted simply an enormous face, more than a metre wide: the face of a man of about forty-five, with a heavy black moustache and ruggedly handsome features. Winston made for the stairs. It was no use trying the lift. Even at the best of times it was seldom working, and at present the electric current was cut off during daylight hours. It was part of the economy drive in preparation for Hate Week. The flat was seven flights up, and Winston, who was thirty-nine and had a varicose ulcer above his right ankle, went slowly, resting several times on the way. On each landing, opposite the lift-shaft, the poster with the enormous face gazed from the wall. It was one of those pictures which are so contrived that the eyes follow you about when you move. BIG BROTHER IS WATCHING YOU, the caption beneath it ran.
Winston AI
Winston AI is an AI-powered tool designed to assist writers in generating content efficiently.
Pros:
- High Accuracy: Claims a 99.98% accuracy rate in detecting AI-generated content.
- User-Friendly Interface: Designed for ease of use, catering to individuals with varying levels of technical expertise.
- Versatile Applications: Suitable for academic institutions, SEO professionals, and writers aiming to ensure content originality.
Downsides:
- Quality Variability: The quality of generated content may vary and require human editing.
- Dependence on AI: Over-reliance on AI-generated content might hinder the development of personal writing skills.
Results
First let’s check with the 1984’s text:
Now let’s go with chatgpt:
Now gemini:
Phrasly
Phrasly is an AI-powered writing assistant that transforms AI-generated content into human-like text, aiming to bypass AI detectors like TurnItIn and GPTZero.
Pros:
- AI Humanization: Modifies AI-generated content to appear human-written, reducing detection by AI detectors.
- Additional Tools: Offers features like an AI writer, AI detector, and quick export options to formats like Google Docs and Microsoft Word.
Phrasly.AI - User Testimonials: Positive feedback from users, including students and writers, highlighting its effectiveness in academic and professional settings.
Downsides:
- Subscription Costs: Full access to all features require a paid subscription.
Results
1984’s text:
It says there’s a 33% probability that the text was generated by AI. That could be a good response, since the likelihood of it being AI-generated is still low. However, I don’t like their conclusion: ‘Your text is likely to be written by AI.’ They should just present the probability percentage.
Now chatgpt text:
Now gemini:
They also have a tool to ‘humanize’ AI text. Let’s give it a try and then see if they are also able to detect it as human-written.
Let’s try with gemini’s text:
Now let’s use again their AI detector:
Originality
Originality.ai is a straightforward tool designed to detect AI-generated content and check for plagiarism, helping ensure your writing is authentic.
Pros:
- Accurate AI Detection: Effectively identifies AI-written text, providing reliable assessments of originality.
- Plagiarism Checker: Scans for duplicate content to maintain integrity.
- Team Collaboration: Allows adding team members for collaborative content management.
- API Integration: Offers API access for seamless integration into existing systems.
Cons:
- Subscription-Based: They don’t allow you to even test a 500 words text for free
- Limited Language Support: Primarily designed for English content.
Results
I tried the 1984’s text but.. You cannot even test one text for free. I don’t see a reason why would I pay for something without being able to test it before and check if it’s better than their competition.
So it’s up to you if you want to test it buying some credits. They are proud to have worked with great brands like “TheGuardian”, so it’s probably a great tool
QuillBot
QuillBot’s AI Content Detector is a free tool designed to identify AI-generated text from platforms like ChatGPT, Gemini, and Claude
Pros:
- Support for Multiple Languages: Identifies AI-generated material in German, Spanish, French, and English.
- Options for Integration: Compatible with a number of writing platforms.
- User-Friendly Interface: Provides a simple layout for effortless navigation.
Cons:
- Basic Free Version: A subscription may be necessary for certain advanced capabilities.
- Possible Inconsistencies: Users have complained about different detection findings’ accuracy.
All things considered, QuillBot’s AI Content Detector is a helpful tool for recognizing AI-generated material, particularly for users who speak many languages. Cross-verifying data with different detection tools is advised for important applications, nevertheless.
Results
1984’s text:
Gemini’s one:
Chatgpt:
I also tried the paraphraser and it works pretty well. It basically gives you suggestions to use different synonyms or expressions
Conclusion
I have mainly tested their AI detection tool, but they also offer other tools that might interest you (such as the text humanizer). My recommendation is to try them yourself since it won’t take much time and choose the one that works best for your needs.