The 5 Best AI Content Detector Tools for 2025: Accuracy & Features

Overview of AI Detection Tools

AI generated content (also known as synthetic content) has become a serious problem for organizations and individuals alike. Today it negatively impacts businesses, media, education, healthcare, science, and governmental institutions.

As AIs are becoming progressively better and the attention span decreases, the ability of humans to detect AI generated content is shrinking. However, the implications for your company or organization can be severe, once your content consumers detect AI generated text, image, or video.

Today, market offers a plethora of AI detection tools to help individuals and organizations address this issue.

In this article, we overview 5 best AI content detectors. After the overview of these tools, we also provide a deeper dive into how they work, choice criteria, accuracy, benefits and ways to bypass them.

As you progress through the article, you’ll find TL;DR in som subsections that summarize the key talking points of the subsection and answer the common questions. It’ll make your reading easier and faster.

Originality.ai Checker for Publishers and Marketing Agencies

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Originality AI is considered the best tool for the professional publishers and marketing agencies.

Key features

1. AI detection
2. Plagiarism detection
3. Fact Checker
4. Readability checker
5. Grammar checker
6. Browser extension
7. WordPress Plugin
8. APIs

Pricing + Plans

The tool doesn’t have free version. There are three plans:

Pay-as-you-go at $30 is a one-time AI detection, where you can check up to 300,000 words.

Pro at $14.95 per month is a monthly subscription for medium teams with a limit of 200,000 words that can be increased at additional cost.

Enterprise at $179 per month is a montly subscription for large publishers with a limit of 1,500,000 words per month that can be increased at additonal cost.

Pros

• Great combination of powerful AI detector and Plagiarism checker.
• Flexible payment system.
• Simple in use
• Premium plan starts cheap and offers the biggest volume of words

Cons

− Relatively limited credits on lower plans

GPTZero AI Detector for Business & Education

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GPTZero positions itself as an affordable tool for educational institutions and medium businesses.

Features:

1. Detecting ai generated content
2. Plagiarism checker
3. Multi language detection
4. Deep Scanning
5. Grammar and writing feedback
6. Security features (for enterprise plan).

Pricing:

Free plan is limited to 10,000 words per month.

Essential at $14.99 per month is a subscrition plan with a monthly limit of 150,000 words that cannot be upgraded.

Premium at $23.99 per month has monthly limit of 300,000 words.

Professional at $45.99 per month and the monthly limit of 500,000 words.

Enterprise Plan offers 2+ seats of professional plan with all the advantages of this plan.

Pros

• Special offer for educators
• Accuracy is praised by independent reviewers
• Clear highlights of AI-written text

Cons

• Somewhat expensive premium plans of higher tier.

Turnitin AI Content Detection for Academia

Turnitin is considered the best for detecting AI content in academic field. It is widely trusted by educational establishments and scientific organizations worldwide. It also has a powerful plagiarism checker.

Features:

1. AI Detection
2. Plagiarism checker for academia
3. Paraphrase detection.
4. Academia-specific features like grading

Pricing

No free version. No fixed pricing. You need to contact sales for quote.

Pros:

• High accuracy
• Strong reputation.
• Best for Academia

Cons:

• No free plans
• No transparent pricing.

Our Score

Copyleaks AI Detector for Enterprises

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Enterprise-grade AI checker with multilingual detection capabilities and good performance in third-party benchmarks.

Features:

1. AI text, and image detection
2. Deepfake detector
3. Plagiarism detection
4. Content moderation
5. Grammar Checker
6. Google docs addon

Pricing and plans

Copyleaks have free tool that enables you to check a text of up to 25,000 characters length (approximately 3000 words). The premium plan starts at $13.99 per month if paid annually.

It has a wide range of premium plans that fit different budget and detection needs, including:

Personal plan is a monthly subscription at $16.99 per month with 100 scans and 25,000 words monthly limit.

Pro plan offers a monthly subscription at $99.99 per month with 3-25 users, 1,000 scans and 250,000 words monthly limit.

They also have special offers for enterprises and educational institutions. However, the prices aren’t provided on the website and are subject to negotiation.

Pros:

• Good detection capabilities in multiple languages
• Great for enterprise
• Good independent reviews

Cons:

• Large volume can be costly.

ZeroGPT for Casual Use and Quick Checks

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Great free AI detector with a wide range of paid plans. It’s best suited for casual or individual users doing quick checks.

Features:

• AI Content Detector
• Plagiarism checker
• ZeroChat (AI model)
• Paraphraser
• Summzriser
• Grammar checker
• AI translator

Pricing and Plans

ZeroGPT offers a free tool with 15,000 characters limitation per scan and 1,000 scans per month.

All of its premium plans include plagiarism checkers, prompts, paraphrasers and AI summarisers.

Pro Plan is $9.99 per month with 100,000 character limitation per AI detection, and up to 50 files.

Plus Plan is $19.99 per month with 100,000 character limitation per AI detection, and up to 60 files.

Max Plan will cost you $26.99 per month with 150,000 character limitation per AI detection, and up to 75 files.

Expert Plan is $69.99 per month with 350,000 character limitation per AI detection, and up to 100 files.

Enterprise Plan offers limitless characters and batch files. However, the vendor doesn’t provide the pricing for this plan on their website.

Pros:

• Easy to use.
• Probably the most flexible pricing tiers.
• Works perfect for obvious AI-generated passages.

Cons:

• Accuracy can be a problem.

AI Detectors: Deep Dive

This and the following sections will help you understand better how AI checkers work, their capabilities, and limitations.

What are AI Detectors

AI detector tools are used to recognize texts, images, or videos generated by artificial intelligence. They use machine learning algorithms to analyze patterns in content associated with AI authorship.

How Do AI Content Detectors Work?

Detecting AI in texts requires a thorough analysis of text, the bigger the text, the better. That’s why AI checkers use large language models (LLMs) to do the job. Usually, they feed LLMs with a large number of texts written by humans and by AIs and train it to recognize subtle patterns.

There are many different methods of detecting ai generated content, including:

1. Perplexity is the predictability of the word choice. Human written content is usually harder to predict.
2. Burstiness is the amount of variations of sentence structure and length. AI generated content is usually less variable.
3. Enthropy is the lexical diversity of text. Humans tend to use more diverse language and more random words.

4. Semantic coherence measures the logical variability and context awareness. AI content sounds too consistent and shallow and often repeats the same ideas over and over.
5. Syntactic regularity is the consistency in grammar and structure. AI text is too “perfect” compared to human written.
6. Metadata analysis is the search for metadata that identify ai generated content. For example, some AI tools can embed hidden watermarks on purpose.

5 Reasons Why You Need AI Content Detection Tools

TL;DR: The key reasons why you need AI detectors include plagiarism prevention, maintaining high authority and credibility, avoiding data privacy issues, and security reasons.

AI Detection for Plagiarism Prevention

Plagiarism can be detrimental to the reputation of both publishers and content creators. It can end a promising scientific career and cause the termination of a long-standing business. In a sense, using AI writing tools is a form of plagiarism — one that modern AI Search Optimization strategies aim to prevent by combining transparency, originality checks, and ethical content creation practices.

Artificial intelligence doesn’t “create” content in a way humans do. It simply paraphrases the texts it has already consumed (or redraws the images it has “seen”). It doesn’t come up with new ideas.

That is why AI written content plagiarises the intellectual and/or creative work of other humans and should never be published as original work.

Maintaining Originality and Credibility

In the previous subsection, we discussed how LLMs rewrite content created by others rather than create new works. That’s why content written by AI lacks originality that is deeply grounded in individual human experience.

Maintaining originality is improtant even in the fields where individual stance of an author isn’t welcomed and is even seen as an obstackle to achieving the main goals (such as scientific research).

Because AI lacks individual experience (and expertise) it’s credibility is also questionable. Another aspect of this issue is AI hallucinations.

If you’ve used generative AI tools long enough, you must’ve come across nonesensical output from them. A much bigger problem, however, occurs when the AI generated content looks true but it’s actually false. It’s especially critical in areas like healthcare, where hallucinations can cause severe damage to human wellbeing.

Recent reports indicate that the number of hallucinations has almost doubled in 2025 since 2024.

Avoid Intellectual Property Issues

The intellectual rights to the AI-generated content are subject to debate by a plethora of lawmakers and non-profit organizations. The most heated debate is around the authorship. Who owns the right to it? Is it the organisation that published the content or the organization that created the Large Language Model? Or is it AI itself? The majority of professionals agree that AI “lacks legal capacity to own rights.”

For now, most legal systems around the globe still lag behind due to their sheer inability to keep pace with technological advancements. However, we can’t expect this area to remain “gray” for a long time. For example, the United States Copyright Office issued policy guidance stating that AI cannot be reviewed as an author:

Help SEO of the Website

In the wake of generative AI, there have been rumors in the SEO community that Google punishes the AI texts. The search engine has never confirmed it, emphasizing instead on the importance of content valuable for humans.

At the same time, Google uses te EEAT principle when ranking the web pages. EEAT stands for experience, expertise, authoritativeness and trustworthiness. Most of thes e are the characteristics of human written texts, since AI tools cannot claim experience or expertise in any field.

That’s why, a human written content has more chances to outperform the AI content in search engines.

Prevention of Synthetic-to-Synthetic Content

One of the biggest concerns around the spread of AI generated content is the emergence of synthetic-content-to-synthetic-content or recursive synthetic data. It happens when Large Language Models train on the texts that have been created by AI.

The associated risks include:

• loss of originality
• change of word meanings (aka semantic drift)
• increase of hallucinations.

AI Detection Accuracy

TL;DR: AI detection tools aren’t 100% accurate, that’s why you need to check their work by analysing text on your own or trying several tools.

When it comes to accuracy of AI checkers, you need to understand two key aspects:

• False Negatives
• False Positives

False negatives occur when the AI content detectors mistakenly consider a certain content to be created by humans. False positives is flagging a content created by human as an AI generated.

Check out this example of false negative in the screenshot below:

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Despite the “Exclude AI-generated” feature being on, the top left image has elements of AI generated visuals.

According to the 2023 European Network for Academic Integrity (ENAI) Study, the false positives probability ranged from 0 % to 50 %. The false negatives probability was between 8 % and 100 %. Other independent sources provide false negative rate at 35%.

AI detector tools usually cite much lower percentages (between 0.004% and 9%) in attempt to attract more customers.

Can You Bypass AI Detectors?

TL;DR: Yes, you can bypass AI detectors by humanizing content.

Here are several ways to trick AI detection solutions:

1. Remake the length of the sentences to make them more diverse.
2. Remove words and phrases associated with AI generated content.
3. Factcheck the content
4. Find repeptitive parts and delete them.
5. Use synonyms to replace “boring” words.
6. Don’t use dashes.
7. Add a story or an anekdote relevant to your topic.
8. Take human written text in a foreign language or ask an AI model to generate text in a foreign language and then translate it.

The Future of AI Detection

In our opinion, the quality of AI generated content will be increasing, and it will become detect such content. At the same time, the AI content detection tools will become more sophisticated in their attempt to stay on the market.

More governments are likely to respond to the abundance of AI generated content with a range of legislative initiatives. These regulations will most likely mandate the disclosure of the use of artificial intelligence in the creative process. It will be especially critical in battling with fakes and political manipulations.

Currently, we see more people expressing frustration from the excessiveness of AI generated images, videos, and texts. In the future, we’ll probably see more applications with AI text and image analysis and the possibility to exclude artificially produced content.

10 Criteria for Choosing the Best AI Detector Tool & How to Check Them

In this section, we’ll be discussing criterua for choosing the best AI content detector tool.

Matching Your AI Detection Needs

This is one of the major factors. In the beginning of this article, we reviewed 5 AI detectors, each best for its particular niche.

Let’s say you need to detect AI in scientific papers, then Turnitin is your best choice. Alternatively if you want to use it occasionally, free plan ZeroGPT is your go-to solution.

Accuracy & Reliability

The percentage of correctly identified AI generated texts is probably the most important criterion when choosing content detector. The easiest way to check it is to find the vendor’s declared false positives or false negatives.

You can also try looking for the information on the tool’s AI detecton accuracy in third-party independent sources. Finally, you can test the solution on your own by testing various types of your own contnet.

Transparency & Explainability

Correctly detecting AI content isn’t enough. The solution should provide explanation on why it considers certain image or text AI generated. It’s especially critical for peaceful resolution of disputes that might occur when a team member, an outsourcer or a student is accused of using AI text generation tools.

Model & Dataset Coverage

Some tools can only detect AI generated text written by certain LLMs (usually GPT). Today there are dozens of machine learning models capable of content creation. If the solution hasn’t been trained on other tools, it can produce many false negatives.

Another problem with coverage is that many AI content detectors have only trained on old LLM versions (like GPT 3.5). Meanwhile newer versions like GPT 5.0 are much better at writing and humanising texts. Therefore, it’s much harder for checers to determine AI generated content.

Robustness to Rewrites & Obfuscation

Many AI detection solutions fail when presented with rewritten, paraphrased, or humanized texts. Before committing long-term, you might want to test how the tool can check AI content generated and humanised.

Pricing Plans

While many tools have a basic free plan, usually, it’s not enough for organizations that create content in substantial volumes.

When looking at pricing plans of AI detection solutions, look at the number of seats (licenses) and/or the number of checks per licence per month.

Ease of Use

Let’s be real, if you have a large team that produces dozens of articles on a monthly basis, detecting AI generated content is a feat for your editorial.

User experience is among the most important factors in successful app adoption. You don’t want to spend money on a AI content detector that your team wouldn’t be using because it’s inconvenient.

What to look at:

• Ability to detect AI right in the application where you edit your content (e.g., Google Chrome extension for Google Docs) without the need to copypaste it elswhere.
• User friendly interface.
• Easy-to-understand results.

Speed & Scalability

Similarly to the previous criterion, teams producing substantial volumes of content heavily depend on the speed and scalability of the AI detectors.

Some tools can spend over 2 minutes detecting AI content. In a fast-paced team, the editor will be distracted and then simply forget about the task at hand.

When it comes to scalability, you would want to be able to conduct several checks simultaneously and increase the number of licenses or checks per month instantly and indefinitely.

Data Privacy & Security

Data privacy and security heavily depends on the field that you work in and the type of content your particular team produces. Remember that AI content detectors are LLMs that access your data, and some vendors will use your data to train their LLMs to improve their performance. They might copy and store your data.

Heavily regulated industries like healthcare have specific rules around where data can be stored and what type of tools can have access to it. We suggest consulting with your legal department, before testing and purchasing AI detectors.

Additional Features

Additional features like plagiarism detector, ai content humanisation or spellchecking can streamline your editorial work. We suggest looking into the functionality that vendors offer to determine which one is the best AI content detector for your organization.

Create High-Quaity Content with dNOVO Group

AI generated content can pose a serious problem for companies that want to position themselves as experienced professionals in their respective fields. AI checkers provide only symptomatic solution to this issue.

To create high-quality unique contentm you need to partner with a Marketing Agency. dNOVO Marketing Agency has necessary experiece and expertise to plan and implement complex content strategy that will help your business attract and convert clients.

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FAQ

1. Are AI content detectors 100% accurate?

Unfortunately, not. All AI detection solutions have a certain percentage of mistakes. These typical mystake is be false positives, when the tool identifies human work as written by AI. Another typical mistake is false negative when the solution thinks that AI generated images or texts are created by humans.

2. Which AI detector is best for my needs?

3. Can AI-generated text be edited to bypass detection?

4. Does Google penalize AI-generated content in search results?

5. Are AI detectors safe to use with confidential data?