Top AI Detectors to Try

AI content is all over the place these days-blog posts, essays, marketing stuff, you name it. It can be tricky to spot what’s real human writing and what’s churned out by a machine, especially as these tools get smarter. That’s why good detectors are handy; they pick up on those subtle clues like repetitive phrasing or overly even structure that often scream “AI.” The best ones nail accuracy without flagging too much legit human text as suspicious. No tool is flawless, but some really stand out depending on what you need, whether it’s for school, work, or just quick checks. Here’s a rundown of solid options people are using heading into 2026.

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1. GPTZero

GPTZero is often one of the first tools people try, especially in schools. It’s designed to catch AI-generated text from most major models, including newer ones that keep popping up. You can paste text, upload files, or even test example content without setting anything up.

One feature that really sets it apart is the writing replay. It shows how a piece of text was built step by step, which teachers find useful when they need to understand how something was written, not just whether it looks suspicious. There’s also plagiarism checking and some basic feedback on the content itself.

The free version works fine for light use, but the limits show up quickly. Paid plans unlock more scans, language support, and classroom tools. It’s not perfect-highly edited or mixed human-AI text can slip through-but overall, it fits neatly into education workflows and doesn’t feel complicated.

Key Highlights:

• File uploads plus sample tests
• Step-by-step writing replay
• Classroom system integrations
• Plagiarism checks

Pros:

• Jump right in with examples
• Proves writing through replay
• Fits school workflows easily

Cons:

• Free scans hit limits fast
• Advanced stuff requires payment
• Can miss very polished mixes sometimes

Contact Information:

• Website: gptzero.me
• LinkedIn: linkedin.com/company/gptzero
• Facebook: facebook.com/gptzero
• Twitter: x.com/gptzeroai

2. Winston AI

Winston AI focuses on clarity. You paste in text, upload documents, or even scan images using OCR-including handwritten notes-and it gives you a clear score showing how likely the text is to be human. It also highlights specific sentences using color coding, so you can quickly see what triggered the flags.

It supports multiple languages and includes plagiarism checks by default. Winston also does a decent job with paraphrased AI text, which is something many detectors struggle with. You get a small number of free credits to test it out, then paid plans unlock higher limits, image detection, and browser extensions.

The visual breakdown is one of its strongest points. The downside is that free credits disappear quickly, and some features sit firmly behind the paywall. Still, for people who want straightforward results they can actually interpret, Winston does the job well.

Main Features:

• OCR for images and handwriting
• Sentence-by-sentence color map
• Plagiarism included
• Multiple languages supported
• Browser extension

Pros:

• Visual map clarifies flags quickly
• Secure handling of uploads
• Catches rephrased AI content

Cons:

• Credits run out on free use
• Image checks only in paid

Contact Information:

• Website: gowinston.ai
• Address: 215, Mont-Royal Ouest, Suite 201, Montreal, QC Canada H2T 2T2
• Facebook: facebook.com/gowinstonai
• Twitter: x.com/GoWinstonAi
• Instagram: instagram.com/gowinstonai

3. QuillBot AI Detector

QuillBot’s detector is simple and surprisingly useful for quick checks. You paste text in, and it labels it as AI-generated, human-written, or somewhere in between. It’s especially good at spotting text that’s been lightly edited or run through paraphrasing tools.

You’ll get probability scores and highlighted lines showing where issues might be. It works best with longer text, but results come fast, and the interface is clean. There’s also a mobile app, which is handy if you’re checking content on the go.

It’s completely free for basic detection, which makes it appealing for everyday use. Just keep in mind that the results are probabilities, not hard proof, and language support is still fairly limited.

Key Highlights:

• Line-specific highlights
• Quick PDF reports
• Several languages
• Distinguishes AI tweaks

Pros:

• Free and straightforward paste-check
• Points out exact problem areas
• Works on mobile app

Cons:

• Needs decent text length for reliability
• Probabilities, not certainties
• Limited language range

Contact Information:

• Website: quillbot.com
• Address: 303 East Wacker, Suite 2101, Chicago, IL 60601, United States of America
• LinkedIn: linkedin.com/company/quillbot
• Facebook: facebook.com/thequillbot
• Twitter: x.com/thequillbot
• Instagram: instagram.com/thequillbot

4. Originality.ai

Originality.ai scans for AI from current models and lets you paste text, upload files, or check whole URLs. It bundles plagiarism, readability scores, grammar checks, and even fact-checking with the AI detection. There’s a deep mode that explains flags and suggests edits, plus a Chrome extension that records writing in Google Docs for proof. Free trial with credits, then paid for unlimited. It combines so many quality checks in one spot, suggests fixes, and scales for big projects or site scans. Scans use credits, signup is required for regular use, and it might be more than needed for simple checks. But if you’re handling lots of content and want everything together, it saves a ton of time.

Key Features:

• Combines plagiarism and fact checks
• Detailed flag explanations
• Site-wide bulk scans
• Extension with writing replay
• Readability scoring

Pros:

• One-stop for multiple quality checks
• Suggests fixes for flagged text
• Scales to big projects

Cons:

• Scans cost credits
• Signup needed for ongoing use
• Overkill for simple AI checks

Contact Information:

• Website originality.ai
• Email: support@originality.ai
• Address: 64 Hurontario St, Collingwood, Ontario, L9Y 2L6
• LinkedIn: linkedin.com/company/originality-ai
• Facebook: facebook.com/groups/5519865934778966
• Twitter: x.com/aioriginality

5. Turnitin

Turnitin is mostly for education, spotting AI patterns in student work, including paraphrased stuff. It integrates right into grading systems and bundles strong plagiarism detection for all kinds of cheating. Educators get tools for feedback and grading too, and it connects to tons of school platforms. No real free personal version-it’s set up for institutions. Seamless in classrooms, covers various issues, and promotes transparency. But it’s aimed at schools, not individuals, and you might need add-ons for everything. For academic settings, though, it’s a go-to because it fits workflows so well.

Highlights:

• Specialized for student writing
• Detects AI paraphrasing
• Integrated plagiarism checker
• Works with many education platforms
• Feedback and grading tools

Pros:

• Seamless in classroom workflows
• Covers a range of cheating methods
• Helps build transparency in assessments

Cons:

• Aimed at institutions, not individuals
• Add-ons needed for full view

Contact Information:

• Website: turnitin.com
• Address: Subbelrather Strasse 15A, Cologne, 50823
• LinkedIn: linkedin.com/company/turnitin
• Facebook: facebook.com/TurnitinSoftware
• Twitter: x.com/turnitin
• Instagram: instagram.com/turnitinco

6. Copyleaks

Copyleaks checks text and images for AI generation or edits, spotting tricks like character swaps in text or pixel changes in pics. Plagiarism search is huge, covering sites, papers, and code, with lots of language support. APIs for businesses, LMS connections for schools, and a free start for individuals. Spots subtle manipulations, has personal free options, and works for code or visuals too. Enterprise leans heavy, image might be extra for basics. Versatile if you need more than just text.

Key Highlights:

• Text and image AI detection
• Large database for plagiarism
• API and LMS integrations
• Many languages covered

Pros:

• Spots subtle manipulation
• Free option for personal use
• Good for code and visuals too

Cons:

• Business features lean toward demos
• Heavy on enterprise security needs
• Image tool might be overkill for basics

Contact Information:

• Website: copyleaks.com
• Address: 115 E 23rd St., 7th Fl, New York, NY 10010
• LinkedIn: linkedin.com/company/copyleaks
• Twitter: x.com/Copyleaks
• Instagram: instagram.com/copyleaksai

7. Crossplag

Crossplag started as a plagiarism checker but added AI detection along the way, which makes sense for schools and sites worried about originality. You just paste the text in or upload something, and it runs a quick scan using machine learning to spot patterns from AI models. It gives a confidence score-higher means more likely AI, lower points to human. They have a free trial with some credits when you sign up, and it’s built to handle academic papers or web content without much fuss. The interface is pretty no-nonsense, just get in and check. It supports a bunch of languages too, since the plagiarism side is cross-lingual. But it’s not loaded with fancy extras like sentence highlights or integrations-more basic on the AI side. Still handy if you’re already using it for plagiarism and want to catch AI cheats. Good for avoiding those SEO hits from low-quality stuff.

What It Offers:

• Paste-and-check setup
• Confidence percentage results
• Focus on academic and SEO issues

Pros:

• Quick and no-fuss interface
• Requires signup but straightforward

Cons:

• Basic compared to bundled suites
• Score is just an estimate
• Limited to text only

Contact Information:

• Website: crossplag.com
• Phone: +38344112596
• Email: support@crossplag.com
• LinkedIn: linkedin.com/company/crossplag
• Facebook: facebook.com/Crossplag
• Twitter: x.com/crossplag

8. Brandwell AI

Brandwell is mostly about creating SEO-friendly content and growing brands, but they threw in a real-time AI checker that’s handy for spotting robotic text. You can paste stuff, type it directly, pull from a URL, or upload files, and it scans for patterns from models like ChatGPT or Claude pretty quick. Their tech digs a bit deeper than basic classifiers, or at least that’s what they say. There’s a rewriter tied in to tweak flagged parts and make them sound more natural-useful if you’re fixing content on the fly. They even have a beta image detector if that’s a concern. Free scans up to a certain character limit, which is nice for testing. Multiple input options make it flexible, and the tips help get better results. But the free cap hits fast, and it’s more geared toward rewriting or creating than pure detection. Beta stuff is still rough around the edges.

Key Highlights:

• Paste, URL, or file input
• Real-time scanning
• Humanizing rewriter
• Beta image check

Pros:

• Multiple ways to add content
• Helps rewrite flagged text
• Quick tips for better scans

Cons:

• Character cap on free scans
• Focused more on rewriting than pure detection
• Beta features still developing

Contact Information:

• Website: brandwell.ai
• LinkedIn: linkedin.com/company/brandwellai
• Facebook: facebook.com/BrandWellAISoftware
• Twitter: x.com/BrandWellAI
• Instagram: instagram.com/brandwellai

9. Smodin

Smodin has a solid AI detector that goes sentence by sentence, catching AI bits even in mixed human-edited text. It handles a ton of languages and runs fast, which is great for longer pieces. Bundles in a plagiarism checker against a big database, plus tools to rewrite or remove those AI traces to make things flow better. You need to sign up, but basic checks are free to get started. Spotting specific sentences is helpful for targeted fixes, and one-click options save time. The originality bundle covers a lot in one go. Though it leans heavy on the rewriting side, so if pure detection is the goal, it might feel extra. Account required, but straightforward enough.

Key Highlights:

• Sentence-level breakdown
• Humanizer and remover
• Plagiarism scan
• Many languages

Pros:

• Spots AI in specific sentences
• One-click fixes for flagged parts
• Bundles originality checks

Cons:

• Heavy on rewriting tools
• Needs account for use

Contact Information:

• Website: smodin.io
• Phone: +1 (855) 766-3460
• Email: support@smodin.io
• Address: 1111B S. Governors Ave #6344, Dover, DE 19904
• LinkedIn: linkedin.com/company/smodin
• Facebook: facebook.com/people/Smodin
• Twitter: x.com/Smodin_io
• Instagram: instagram.com/smodin.io

10. Pangram Labs

Pangram Labs focuses heavily on accuracy and transparency. It breaks text down into sections and labels each part as human, AI, or mixed. It claims to detect output from a wide range of models, including newer ones, and handles paraphrased content fairly well.

There are integrations with Google Docs, browser extensions, and classroom tools, plus plagiarism reports. Free accounts get a small daily allowance, which works for light use.

It’s clearly aimed at educators, publishers, and teams rather than casual users, but the detailed breakdowns make it one of the more informative tools on the list.

Key Highlights:

• Detects specific LLMs
• Section-by-section analysis
• Classroom and browser integrations
• Plagiarism reports
• Multilingual

Pros:

• Detailed authorship breakdown
• Works with common tools
• Daily free allowance
• Spots tricked content

Cons:

• Free limited to few checks per day
• Geared toward education and publishers
• API for bigger needs

Contact Information:

• Website: pangram.com
• Email: info@pangram.com
• LinkedIn: linkedin.com/company/pangramlabs
• Twitter: x.com/pangramlabs
• Instagram: instagram.com/pangramlabs

11. Quetext

Quetext scans line by line for those telltale signs like weird structures, word repeats, or choices that scream AI from models like ChatGPT or Llama. Gives confidence scores and highlights suspicious spots right in the text. Ties into their paraphraser and citation tools, handy for fixing or sourcing. Free for limited words, then subscription for more. Points out exact issues fast, easy to just paste and go, and has a guide for common AI flags. Processing is quick even on chunks. But word limits on free bite if checking big stuff, and paid unlocks the full power. Sticks to text, no images or extras.

Key Highlights:

• Line-by-line breakdown
• Flags various AI models
• Confidence scoring
• Fast processing

Pros:

• Spots issues in specific sentences
• Easy paste and check
• Includes common AI signs guide

Cons:

• Word limit on free scans
• Subscription for full use
• Focused on text only

Contact Information:

• Website: quetext.com
• Email: support@quetext.com
• LinkedIn: linkedin.com/company/quetext
• Facebook: facebook.com/quetext
• Instagram: instagram.com/quetext_official

12. MyDetector.ai

MyDetector.ai lets you paste text or upload files-PDFs, Word, even PowerPoints-and checks for AI patterns from ChatGPT, Gemini, things like that. Highlights sentences with percentage gauges for likelihood, and suggests tweaks or humanizes flagged parts. Real-time results, works for education, media, marketing folks. Completely free for basic stuff, no big restrictions mentioned. Direct file handling is convenient, visual gauges quick to read, and rewrite help built right in. Multi-format saves steps. Though it relies on current patterns, which shift over time. No deep integrations noted.

What It Offers:

• File upload support
• Sentence highlighting with percentages
• Humanization option
• Multi-format handling

Pros:

• Handles documents directly
• Quick visual feedback
• Built-in rewrite help

Cons:

• Relies on patterns that might shift
• No mentioned integrations

Contact Information:

• Website: mydetector.ai
• Twitter: x.com/MyDetector

13. Undetectable AI

Undetectable AI runs your text through simulations of big detectors to predict if it’d get flagged as AI from common models. Shows probabilities from multiple tools side by side. Has a humanizer to rewrite and aim for better human scores. Free up to word limits, with refine options. Comparing several checkers at once is smart for cross-verification, interface keeps it simple, and adjustment help if needed. Sample texts to try. But free caps words, results are just predictions-not guarantees. Heavy focus on making stuff undetectable.

Key Highlights:

• Multi-detector simulation
• One-click checks
• Built-in humanizer
• Sample texts available

Pros:

• Compares against several checkers
• Helps adjust flagged content
• Straightforward interface

Cons:

• Word cap on free use
• Results are predictions
• Heavy on bypassing focus

Contact Information:

• Website: undetectable.ai
• Address: 1309 Coffeen Avenue, Sheridan, WY, US, 82801
• LinkedIn: linkedin.com/company/undetectable-ai
• Facebook: facebook.com/p/Undetectable-AI
• Twitter: x.com/undetectableai

14. Grammarly

Grammarly’s main gig is polishing writing-fixes, tone tweaks, idea generation-but the AI detector scans for patterns from ChatGPT, Claude, Gemini, and gives percentage estimates with section highlights. Integrates plagiarism and citations, works alongside paraphrasing or rewrites. Free covers basics and some prompts, Pro unlocks more rewrites and full detector. Fits right into regular editing, suggests tone for audience, keeps brand voice steady. Plagiarism ties in well. Though estimates aren’t always spot-on, paid for advanced bits, and sometimes flags heavily edited human text.

Highlights:

• Tone and clarity suggestions
• Text generation prompts
• Plagiarism integration
• Percentage-based AI scoring

Pros:

• Fits into daily editing flow
• Shows audience perception
• Handles brand voice consistency

Cons:

• Detector results are estimates
• Advanced AI features in paid tiers
• Can flag refined human text

Contact Information:

• Website: grammarly.com
• Address: 548 Market Street, #35410, San Francisco, CA 94104
• LinkedIn: linkedin.com/company/grammarly
• Facebook: facebook.com/grammarly
• Twitter: x.com/grammarly
• Instagram: instagram.com/grammarly

15. SurgeGraph

SurgeGraph is built for SEO content creation, analyzing top pages for outlines and insights, but includes a sentence-level detector and strong humanizer to dodge flags. Free detector with character limits, paid for more generations and tools. Helps find fresh angles, drafts quick, fixes flagged spots easy. Humanizer works decent to naturalize output. But it’s more about growing traffic than detection alone, humanizer isn’t perfect every time. Paid plans for serious use.

Key Highlights:

• Topic and outline builder
• Built-in humanizer
• Sentence-level detection
• SEO data integration

Pros:

• Helps with fresh angles
• Quick content drafts
• Fixes flagged parts easily

Cons:

• Geared toward traffic growth
• Humanizer not foolproof
• Paid for heavier use

Contact Information:

• Website: surgegraph.io
• Email: hello@surgegraph.io

Conclusion

Choosing one comes down to the daily grind-some fit classrooms with integrations, others quick pastes or batch jobs, a few lean into rewriting to fix issues. No detector nails it 100% since AI keeps advancing and detectors chase behind. Worth testing a handful with typical text, especially mixed or edited stuff, to see what flags reliably without crying wolf too often. That way authenticity stays solid without constant headaches.