Top 7 AI Content Detector Tools You Should Try in 2026

If things proceed as they are, very soon the entire internet will be filled with AI-generated content. Ranging from writing emails, writing a text message, to creating YouTube scripts, AI is already ubiquitous. What is challenging is the fact that none of the AI-content comes with a disclaimer that will suggest whether it is automated or human written. As LLM models, machine learning, and the overall AI technology improve in the future, AI generated content will become more like humans. Thus, it can get increasingly impossible to differentiate AI content from human content. This is where AI content detectors can play a significant role.

AI content detector tools are developed with the same technology as mainstream LLM models such as ChatGPT. Instead of being trained just with human-created content, they are also inputted with AI content. Thus, they become an efficient tool to differentiate between human content and AI content. For someone who is checking how human effort has been put into creating any online content, AI content detectors prove to be a great option.

What Are AI Content Detector Tools?

AI content detectors can be defined as platforms designed to recognize content created by Artificial Intelligence. With increasing competition in the AI landscape, mainstream competitors like Open AI, Anthropic, Google, DeepSeek, and xAI are releasing updates every six months. Quite recently, Anthropic has released Sonnet 4.5, which is promoted as the most advanced model for software development and data analysis. Thus, in future, skilled prompt engineers can see themselves creating AI content practically indifferentiable from human-written content. However, thanks to proficient AI detectors, users can quickly check whether the content is AI or not with just one click.

How Do AI Content Detectors Work?

Many AI content detectors come with a very straightforward interface. All you have to do is just paste your content, click on a button, and then see your verdict. In simple terms, AI content detectors basically search for patterns and phrases that indicate that the content is AI generated. Now, it is important to understand that each tool is unique and adopts its own method of detecting AI. Nevertheless, there are two common concepts that come handy in AI detection:

Perplexity:

One of the concepts that is used in AI detection is perplexity. It gauges the unpredictability of the content. As it turns out, AI-generated content contains a predictable pattern and has less perplexity. This means that all the word choices are predictable that suggests a lack of human input. On the other hand, human-written content tends to be more unpredictable with surprising words or phrases used throughout the content. Humans aim to make their content more engaging and choose more curious words or sentences. Furthermore, with increasing accuracy of AI content detection tools, odd typos here and there also indicate manual work in the content.

Burstiness:

Another key concept used in AI content detection is burstiness. Burstiness refers to the overall variation in sentence structure and length. In AI content, you will see less burstiness and mostly, all sentences appear of the same size. In human writing, you will see a higher level of burstiness combined with increased use of passive voices and way too long sentences.

Based on the factors discussed above, all the AI content detector tools give a probability score on whether the content is human-generated or machine-generated. However, it is significant to understand that LLM models are improving on a daily basis. In 2-3 years, we can see much better tools who can evade AI detection. Therefore, it is critical for AI content detectors to keep up and improve their detection techniques.

Note: As explained above, all AI content detectors give a probability score in its verdict. Thus, none of them are fully accurate. All the tools discussed in the next section have a margin of error.

Winston AI:

It is a comprehensive AI content detection tool that offers a complete list of advanced features such as AI image and text detection, plagiarism detection, and even analysis of handwriting. It stands apart in the market for its user-convenient interface and free plans that democratize its accessibility. And, as it turns out, it offers a decent accuracy rate as well.

How Winston AI Works?

Winston leverages a strong combination of linguistic analysis, data training, and algorithms for recognition of patterns. It checks aspects such as burstiness and perplexity to check the probability of the content to be generated by AI. It also provides a human score to indicate the likelihood of the content to be generated by a human. There is also an AI prediction map that flags the sections that are possibly generated by AI. In the interface, the platform gives you an option to either import the content from URL, upload the file, or directly paste the content. You can also give the title of the document and mention the document author. The only demerit is that users get a free trial for only 14 days with 2,000 credits.

Our Test Result:

The tool correctly predicted that the content is 100% AI generated.
The readability score was given 32/100, and the content was commented as difficult to read.
There is also a feature to detect plagiarism, which is offered only in elite and advanced plans.
In the AI prediction map, you can determine the section, phrases, or sentences that are artificially generated and the ones that are human written.
There are color codes, which indicate the AI content probability. It varies between light pink to light green.
Here, light pink indicates that human score varies between 0-20 and light green indicates that human score is between 80-100.
Minor portions of the content were manually edited, which were also flagged as AI. So, there are possibilities of false negatives as well.

Pro Tip: If you face trouble understanding the Winston AI verdict, you can refer to the dedicated page of the website to understand what various metrics mean.

Winston AI Pricing:

The platform offers a flexible pricing plan with generous free tiers. The pricing plan is divided into four tiers: Free, Essential, Advanced, and Elite with prices varying between $0-$26/month.

Quillbot AI Detector:

It is an extremely popular and simple tool designed to recognize AI-created content. Along with flagging AI content, it also flags content that appears to be fine-tuned by paraphrasing tools or grammar checks. Apart from AI detection, it also offers various other features such as plagiarism detection, paraphraser, AI humanizer, grammar checker, etc. It is popular all around the industry for its generous free pricing tier.

How Quillbot AI Works?

The AI detector platform offered by Quillbot AI leverages sophisticated algorithms to flag text probably generated by AI. It looks at numerous characteristics such as burstiness, perplexity, unnatural flow, and awkward phrasing. In the verdict, the tool offers an in-depth report flagging specific sections of text that look to be AI-generated. The process of using this tool is as simple as it can be. Just copy and paste your content or upload your doc. After that, click on “Detect AI” and see your results.

Our Test Results:

For this test, the platform was not found to be accurate as it gave AI content detection probability of just 36%.
64% of the text was highlighted as human.
It also offers metrics that tell whether the content is human-written and AI refined, or AI written and AI refined. Both metrics were 0 in our case.
The tool offers options to download the report or use a shareable link to share the report anywhere.
Despite its flaws, a lot of users prefer it because of its free plans, simple interface, and moderately accurate results.

Quillbot Pricing

The Quillbot premium plans exist in three tiers: Free, Premium, and Team Plan. The paid plan starts at $4.17/month billed annually. There is a 3-day money back guarantee which allows you to get a full refund if you are not happy with the platform after 3 days. In the Team Plan, you get all the features of the Premium Plan along with data control, personal support, centralized billing, team usage metrics, user management dashboard, etc. You can get tailored quotation in Team Plan as per your organization’s needs and goals.

ZeroGPT:

When it comes to the oldest AI detection tool in the market, ZeroGPT is one of the first names on the list. A lot of users' report being satisfied with the free version of the tool. Its complete range of characteristics goes beyond simple AI detection and includes paraphrasing, summarization, and translation. It stands apart due to its free version and usage-based API option for businesses.

How ZeroGPT Works?

ZeroGPT utilizes a technology called DeepAnalyse^TM a multi-layered methodology, that assesses text from macro to micro levels. The tool executes deep learning as per the extensive collection of text including educational datasets, internal content, and proprietary synthetic Artificial Intelligence datasets. The simplicity of this tool can hardly be matched. Just paste your content in the box and hit “Detect Text.” The verdict will be showcased at the bottom. In the free version, you can check content up to 15,000 characters.

Our Test Results:

Our content was found to be 100% human, which raises doubts about the tool’s accuracy.
The tool flags all the AI content by the yellow color, which was none in this case.
There is an option to export the verdict in the form of a PDF document.

There is an option to export the verdict in the form of a PDF document.

ZeroGPT Pricing:

There are no charges or credit card details required for registration. ZeroGPT divides its pricing plan into two sections: Personal and Business. There are 3 tiers in Personal section: Pro, Plus, and Max. In the Business section, there is an expert plan and there is an enterprise plan. The monthly pricing plan in Personal section varies in the range of $9.99-$26.99. The expert plan is priced at $69.99/month for an expert plan. Enterprises can get customized pricing based on their unique requirements.

Originality.ai

Originality.ai has grown in popularity over the years, promising a high accuracy rate for businesses who want to absolutely avoid publishing AI content. Its feature range comprises plagiarism checking, AI detection, fact-checking, and readability analysis serving teams that handle copious amounts of content. It ensures total compliance with privacy needs by encrypting all data and not sharing data with any third-party source. It also promises not to use your data to train its AI models. In the free plan, it offers a limit of 750 words per scan. The plagiarism score and readability score are not available in the paid plan.

How Originality.ai Works?

Though it is not quite clear what methodology the platform adopts in checking AI content, they promise to accurately recognize content generated by popular LLM models such as GPT-4, Claude, Gemini, Llama, etc. The platform boasts about outperforming every other AI content detection tool in the market because it utilizes advanced AI algorithms, natural language processing methods, and higher computing power. Some users express disappointment over its high false negative rate, complex interface, and expensive pricing. Despite this, it is quite widely trusted among professional writers and marketers.

Our Test Results:

Fig 1: Our Test Results Showing 100% AI

Fig 2: The available 3 models in free plan to check AI content

Fig 3: The color codes used in Originality.ai

The tool shows that it is 100% confident that the content is AI generated.
Apart from giving a score, it also highlighted the AI-generated content.
You can select the AI detection models from among the three available (as shown in the above image. We selected “Lite (Best for Students & Teachers)” for this test.
The other two models are more sensitive and stricter in detecting AI content. This is why; most users go for this model.
It also uses a color code to flag which portion of the content is likely to be machine-generated, and which is human-generated. Here, dark orange means that the tool is 100% certain that the content is AI, and dark green means that the tool is 100% certain that the content is human.

Smodin:

Smodin is another popular name in the list that comprises various additional features such as text improvement suggestions and grammar checking. The interface looks slightly old-fashioned but is quite simple to navigate, which can suit a broad range of users who need a quick and smooth check. In the free version, the tool allows the user to check content for up to 5,000 characters. Apart from AI detection, it also offers a whole list of capabilities such as humanizers, plagiarism checkers, text summarizers, AI writing assistance, AI chat, etc.

How Smodin Works?

As per the documentation provided by Smodin, the platform leverages sophisticated algorithms to spot AI-generated content. The tool assesses various factors such as complexity in writing, language consistency, and factual errors to see if there was any AI involved in creating content. Its capability in AI detection promises accurate detection of content generated by Microsoft Copilot, ChatGPT, and Gemini. In a friendly plan, it offers up to 5 weekly uses.

Our Test Results:

The tool flagged 24% of our content to be AI-generated while 76% of content to be human-written.
The suspicious content was flagged with light yellow color.

Smodin Pricing Plan:

The pricing plan is divided into three tiers: Writing, Reviewing, and Ultimate. The overall pricing range varies between $9-$18.

Copyleaks:

Copyleaks is a flexible software for AI detection combined with robust features for content creation and plagiarism detection. It is specialized for content reviewers, educators, and businesses that work across numerous languages, platforms, and formats. This detector can aid you in authenticating your material and ascertaining compliance. Its key advantages include smooth integration with Microsoft Word, Google Docs, Chrome, and prominent LMS platforms. It also renders in-depth reports for editorial, academic, and business use.

How It Works?

Copyleaks relies on advanced NLP (Natural Language Processing) technology and ML algorithms to carry out detailed searches all across the web and the internet. The AI software helps in scanning raw text, documents, code, and URLs in 100+ languages. Through robust API and LTI integrations, it ensures support to organizations in safeguarding academic plagiarism and copyright infringement. For more details, you can check out the official website of Copyleaks.

Our Test Results:

Around 93.4% of content was found to be AI-generated.
Copyleaks also provides various resources like FAQ sections or Help Center, which you can go through if you have any queries.

Copyleaks Pricing

The pricing plan of Copyleaks is divided into three sections: Individual, Enterprise, and Education. Copyleaks also offers regular discounts on its yearly and monthly plans to help users avail themselves of its services in an affordable way. For individual users, it offers Personal and Pro plans. Users opting for enterprise and education plans can go for custom quotation.

Writer.com

It is an enterprise AI agent platform that revolutionizes what agentic transformation can achieve. It helps businesses streamline everything, ranging from campaigns and RFPs to customized comms and research. It renders solutions across diverse departments such as Legal, HR, Finance, Support, Marketing, and Sales. Its core area of expertise includes customized portfolio reporting, content supply chain, field productivity, inventory management, generative search, GEO, automated invoice processing, etc.

How Writer.com AI Detection Works?

As far as its AI detection is concerned, the interface is quite simple and looks similar to the platforms mentioned above. It detects AI text by assessing structure, linguistic patterns, and style to measure the possibilities of the text being AI-generated. The platform claims to use a detection model, trained extensively with human-generated and AI-generated content. Its vast training makes it efficient to quickly flag machine-like patterns.

Our Test Results

Fig 1: Verdict of our test content

Fig 2: Verdict of webpage URL

Fig 3: Verdict of another content generated by ChatGPT.

We found the interface to be elegant and simple.
Since the free plan allows AI content detection up to 5,000 words, we easily tested our content.
However, the content was found to be 100% human generated. Thus, its accuracy is questionable at the very least (shown in Fig 1).
It provides an option to check any of the webpages. We tested the page “Conceptual Framework of IoT,” which is ranking on the first page. The verdict said that it is 100% human generated (shown in Fig 2).
We checked another content generated by ChatGPT on the platform and the verdict gave a 92% human generated score (shown in Fig 3).
It can be concluded from our test results that the platform is relatively less accurate than the above 6 tools.

Writer.com Pricing

Users can opt for either Starter or Enterprise plan. For more details on Writer.com pricing plan, you can proceed to visit the official website-

Conclusion

As AI-created content becomes increasingly human-like, AI content detector tools become vital for online credibility and transparency. While no platform promises 100% accuracy, platforms like Winston AI, Copyleaks, and Quillbot are widely preferred because of their generous free plans, moderate accuracy, and simple interface. With consistent evolution in LLM models, such detectors must also develop to remain useful. For businesses, content creators, and educators, incorporating the right AI content detector solution ascertains authenticity and aids in preserving reliability in online communication.