GPTZero Plagiarism Checker Review 2024:
I Tried it for 14 days, Here's
What I Found [3 Pros, 5 Cons]

• GPTZero Plagiarism Checker Review Summary
• 3 Things GPTZero Plagiarism Checker Does Well
• 5 Big Mistakes GPTZero Plagiarism Checker Makes
• What Does GPTZero Plagiarism Checker Cost?
• What are Some GPTZero Plagiarism Checker Alternatives?
• What is GPTZero and Who Developed This AI Plagiarism Checker?
• How Accurate and Reliable Is GPTZero Compared to Turnitin?
• Is GPTZero Free and What Is the Refund Policy?
• Is GPTZero Safe and the Best AI Detector Available?
• What Do Burstiness and Perplexity Scores Mean in GPTZero?
• Is GPTZero Plagiarism Checker Legit? - The Final Verdict

GPTZero Plagiarism Checker Review Summary

3 Things GPTZero Plagiarism Checker Does Well

• User-friendly Design: The tool is set up in a way that's easy to figure out, even if you’re new to these kinds of websites, so you don’t spend ages learning how to use it.
 
• Versatile Features: You’ll notice it’s not just for one thing; you can check for plagiarism, scan your text for AI writing, and just generally see how real your writing seems all in one spot.
 
• AI Scan Tool: Here, you can check if your writing sounds like it was made by a computer or a human, so it’s useful if that’s something you need to worry about.
 
• More about why GPTZero stands out below.

5 Things That Make GPTZero Plagiarism Checker Super Frustrating

• Customer Service Nightmares: If you ever want a refund or need to cancel, get ready for a headache. Their support hardly ever helps and getting your money back feels impossible, so you end up stuck and annoyed.
 
• Locked into Pricey Subscriptions: You have to pay for expensive monthly plans, even if you don’t use all your credits. But guess what? Any unused credits vanish at the end of every month. So you’re basically paying for stuff you never get to use.
 
• Mistakes in Plagiarism and AI Detection: Sometimes GPTZero says your totally original stuff is from AI or copied—even when you know it’s not! That means you can get flagged or worried for no good reason.
 
• Poor Language Support: If you’re not writing in English, you’re out of luck. The tool really struggles with other languages, so it’s close to useless for people outside English-speaking countries.
 
• No Free Features Worth Using: They act like there’s a free trial, but everything you actually need is hidden behind a paywall. You basically can’t do anything helpful without coughing up cash.
 

What Does GPTZero Plagiarism Checker Cost?

• Essential Plan – So, this one's $14.99 a month and gives you 150,000 words—honestly, that's not a ton if you check loads of stuff. You get basic AI scans, grammar stuff, and their Chrome extension but nothing too fancy. I’ve found it works for smaller needs, but the credits run out pretty fast if you’re scanning a lot.
 
• Premium Plan – At $23.99 a month, you get 300,000 words which is a bit better, plus you get advanced scans, feedback on your writing, plagiarism checks, and citation help. It covers more, but if you go over the word limit, you need to pay more, so keep that in mind. I like the extra features, but honestly, still a bit pricey for what you get.
 
• Professional Plan – This one's $45.99 every month and gives you 500,000 words plus up to a huge 10 million words as overage, which sounds wild if you’ve got tons to check. You can scan 250 files at once, get page-by-page scans, and even use it with a team. It's stacked, but the monthly price stings unless you really need all of that.
 
• Should you buy GPTZero Plagiarism Checker? I’d say no unless you’re sure you’ll use all those words—if you don’t, your credits disappear anyway, and that feels wasteful to me.

GPTZero Plagiarism Checker Review - What Does it Get Right?

1. User-friendly design:
   • The site makes things super simple, even if you’ve never used a tool like this before.
    
   • You pretty much click around and get what you need without a bunch of confusing steps.
    
   • People like how it's easy to spot any plagiarism or issues, so you don’t waste time trying to figure it out.
 
2. Versatile features:
   • You don't have to use a bunch of different tools since this one can check for plagiarism and AI writing all at once.
    
   • There's an option to get a scan that shows if your writing feels authentic, with quick sentence checks across your whole work.
    
   • If you’re teaching or working in a job with a lot of writing, this helps you see everything about your text in one place.
 
3. AI scan tool:
   • If you ever wonder if your work sounds like it’s made by a robot, this tool points it out for you.
    
   • It actually checks each sentence to show you what’s likely done by AI and what’s probably written by a person.
    
   • This is pretty useful if you need to make sure your writing seems human for school or work stuff.

“User-friendly interface.” ― Review Author

GPTZero Plagiarism Checker Review - Where Does It Really Let You Down?

• Customer Service Nightmares
  • If you run into trouble, the support team takes forever to respond, and sometimes you never get an answer. Even if you just want to ask a basic question, you end up waiting way too long.
   
  • Based on my own experience and what others say, refunds are basically a lost cause. If you try to get your money back, you’ll just get bounced around and ignored most of the time.
   
  • If you need to cancel your plan, the steps are confusing on purpose. You need to dig through their site or even send emails, and you’re still never sure if your request went through.
 
• Locked into Pricey Subscriptions
  • You have to buy a subscription to actually use anything worthwhile, and it’s not cheap. There’s basically no way around paying a lot just to run a few checks each month.
   
  • Every month, you lose any leftover credits. So even if you don’t use what you paid for, it disappears and you don’t get it back next month. That's just plain unfair to you.
   
  • I know from my tries that you can't just pay for what you really use. You get locked into these plans, and there’s no good way to save credits or just buy what you need when you need it.
 
Here's a review by Erad D discussing their experience:
 

“Really bad, I wrote a thesis myself and wanted to check plagiarism because I had cited long paragraphs. The website, free trial of premium version, said that around 5-8% was AI. Like, literally if I put hundreds of hours on writing this, it is saying tens of hours of writing are AI, and for plagiarism is even worse. I have the cites between "" but software says I don't, or that I didn't mention other things. Not recommended.” ― Erad D (IT)

 
• Mistakes in Plagiarism and AI Detection
  • It’s super frustrating when GPTZero keeps saying your original stuff is written by AI or copied from somewhere even though you did all the work yourself. It makes you feel like you did something wrong, when you know you didn’t.
   
  • Lots of reviews say it randomly marks quoted and cited stuff as plagiarism, even if you did everything right. It just can’t tell real research and hard work from actual copying.
   
  • From what I’ve seen, it even gives totally different results on the same text if you run it twice. That just doesn’t inspire any confidence or trust in the results you’re getting.
 
• Poor Language Support
  • If you're writing in anything except English, GPTZero really struggles. It just can’t understand or accurately check stuff in other languages, which means it won’t help a lot of people at all.
   
  • It only works well for English text, so if you’re from another country or your school gives you work in a different language, you’re out of luck with this tool.
   
  • My tests in multiple languages always fail or come back with errors. So if you need real multi-language checks, this tool leaves you stranded and frustrated every time.
 
• No Free Features Worth Using
  • They act like there’s a free option, but you can’t really do anything useful unless you pay. The “free trial” is just a trick to get you on a paid plan, and you find this out only after signing up.
   
  • Anything that matters is locked, and the free checks are so limited, you can barely test the tool at all. You just waste time before they ask you to pull out your wallet.
   
  • I’ve tried the free parts and honestly, it’s not even enough for a quick homework check. If you want any real features, you’ve got to pay, and it’s not cheap.
 
Here's a review by an anonymous author discussing limited language support:
 

“Limited language support” ― fahimai

What Does GPTZero Plagiarism Checker Cost?

• You get 150,000 words every month, but here’s the catch: those words reset every month, so if you didn’t use them up, you lose them. Think about it—you're basically throwing away what you paid for if you didn’t have a ton of stuff to check that month.
 
• This plan comes with just the basics: Basic AI Scan, Grammar Check, AI Vocabulary Check, and their Chrome Extension. No advanced stuff or deep features here. It’s really bare-bones for $15 a month.
 
• And honestly, from what I’ve tried, the grammar check is pretty basic—it misses stuff you’d expect to get fixed. For $15 every month, that just feels steep, especially since you have to keep paying again and again for the exact same amount of credits.

• This is their “Most Popular” plan, and it gets you 300,000 words a month. Again, those words DO NOT roll over if you don’t use them—so you’re paying every month for a pile of words that vanish at the end of the month. I honestly hate this setup.
 
• Compared to Essential, you do get a bit more—things like Advanced Scan, Writing Feedback, Plagiarism Check, Source and Generate Citations. Problem is, if you aren’t maxing out those features every month, you’re still out nearly $24 each time your card gets hit.
 
• In my own experience, the advanced scan is nothing special, and the plagiarism checker isn’t any more accurate than some free online tools. So why am I handing them $24 a month for this?

• Now this is the “big one”—500,000 words per month, and you can actually go up to 10 million in overage (but I doubt any regular person ever needs that). And just like every other plan, you lose your words when the month is up. No saving them for later.
 
• You get the Premium stuff plus scanning up to 250 files at once, page-by-page scanning, teams collaboration, and “enterprise-grade” security. But let’s be honest: For nearly $46 a month, unless you’re running some HUGE operation, this is way overkill—and crazy expensive.
 
• And here’s the kicker: No plan gives you any kind of refund if you don’t use your credits. Once a month starts, that money’s gone. You can cancel anytime, but you’re still stuck paying for the rest of the month, no refunds. For something billed as “professional”, that’s kind of a raw deal.

• There’s no clear refund policy. You can search their site, but from what I can tell, you rarely get your money back—especially after your billing cycle starts. I’ve never gotten a refund for unused credits, and I've heard the same from others.
 
• Yes, you can cancel whenever, but guess what? You're still on the hook for the rest of the month. They don’t automatically refund you if you forget to use your credits or if you realize it’s not for you. Honestly, for this much money, I expected them to be way more customer-friendly.

• I found AIDetectPlus and it blows GPTZero Plagiarism Checker out of the water when it comes to value.
 
• First off, credits NEVER EXPIRE. You pay once, you keep your credits until you actually use them. None of this monthly “use it or lose it” nonsense.
 
• You can start with as little as 5000 words for just $5 (that’s one-time, not monthly!) and upgrade if you hit your limit. No subscription traps—buy more only if you need to.
 
• With AIDetectPlus, you get top-notch plagiarism checking, AI detection, and even humanization—everything in one place. That’s a lot more than GPTZero offers, for way less cash (see their pricing).
 
• If you’re tired of fees stacking up every month, AIDetectPlus is honestly just smarter. Why pay forever for the same thing?
 
• Want a side-by-side look? Check out the full comparison below.

What are Some GPTZero Plagiarism Checker Alternatives?

#1 - GPTZero Plagiarism Checker vs AIDetectPlus

• Both of these help you figure out if your writing is original or if it sounds like it came from an AI bot.
  • GPTZero Plagiarism Checker is super popular and has a simple design. It's got tools for checking plagiarism, scanning for AI writing, and giving you a quick sense if your text seems “human.”
  • AIDetectPlus has an all-in-one plagiarism and AI checker that's made for anyone—students, freelancers, teachers, bloggers—you name it.
 
• Where is AIDetectPlus Better?
  • Honestly, AIDetectPlus saves you a ton of hassle. No subscriptions, just pay once for credits that never expire. Way less stress about losing your money or forgetting to cancel each month.
   
  • You get all the features in one place: an AI detector, plagiarism checker, and even a humanizer to rewrite your stuff—so you don’t have to juggle different tools.
   
  • There's a real free trial—useful, with no credit card needed. I love that you get to actually see if it works for you before spending money.
   
  • The support is helpful and quick (no more being ignored!). And it handles lots of languages too, not just English.
   
  • Plus, there’s no word cap on each input. Makes it a breeze for long essays or articles.
 
• Where is GPTZero Plagiarism Checker Better?
  • It’s pretty easy to use and has some cool features if you just want simple checks, but if you’re looking for the most value, I really think AIDetectPlus is the better deal.

#2 - GPTZero Plagiarism Checker vs Turnitin

• Both GPTZero Plagiarism Checker and Turnitin let you check if your work is copied or written by AI, but they're built for different kinds of people.
  • GPTZero Plagiarism Checker is designed for anyone who wants something easy to use—like students, bloggers, or folks just curious if something looks off.
  • Turnitin is a big deal in schools and colleges, made for teachers and classes, so it's more official and set up for academic stuff.
 
• Where is Turnitin Better?
  • Turnitin is best for teachers and schools—it gives thorough plagiarism and AI reports that teachers love, and it connects with school platforms to handle assignments easily.
 
• Where is GPTZero Plagiarism Checker Better? GPTZero Plagiarism Checker is simple and quick if you need to just check a few things outside the classroom. I find it handy when you’re not dealing with school assignments and want a fast check.

If you're interested in an in-depth review of Turnitin, you can read more about it here.

#3 - GPTZero Plagiarism Checker vs Duplichecker

• So here's the deal – both GPTZero Plagiarism Checker and Duplichecker help you spot plagiarism, but they do things pretty differently.
  • Duplichecker is all about being easy, quick, and totally free for basic checks—you don’t even have to sign up. If you just want to see if your writing is original without any hassle, it’s awesome for that.
  • GPTZero gives you more features. You can check if your writing sounds like a human or a robot, and it comes with a bunch of tools all in one place. But, honestly, you have to pay to really use anything worthwhile, and it’s better if you care about AI detection too.
 
• Where is Duplichecker Better?
  • Duplichecker is completely free for small checks, and you don’t need an account or credit card. It’s perfect if you just want a fast answer and aren’t super worried about fancy features.
   
  • If you don’t care about advanced stuff or scanning for AI, it saves you a ton of time (and money) and works fine for everyday homework, blogs, and emails.
 
• Where is GPTZero Plagiarism Checker Better? If you want extra tools like checking if your text is written by AI, or you want a clean, easy-to-use design, GPTZero does all of that. Just remember, the good stuff costs money, and it’s not great if you’re not writing in English.

If you're interested in an in-depth review of Duplichecker, you can read more about it here.

What is GPTZero and Who Developed This AI Plagiarism Checker?

What are the main features of GPTZero plagiarism checker?

• GPTZero checks if your writing looks like it was made by an AI, mainly by measuring how simple or complicated your sentences are, and how much they change in length.
 
• If you want to scan for copied work, it also has a regular plagiarism checker that searches the web for matches with your text.
 
• You can install a Chrome extension called "Origin" that tracks your writing history in Google Docs, so you can prove if you really wrote it yourself.
 
• It has some handy features like grammar tips, fact checks, and even tools for catching common “AI words” that might seem suspicious.
 
• Not just English — it can spot AI writing in several languages, but it’s mostly focused on English writing these days.

Does GPTZero save your work or data?

• According to GPTZero, it doesn't keep your personal info or use your data to train any AI models, so your stuff stays private.
 
• If your school or company wants even more control, there’s an option to keep all your data on your own servers instead of sending it to GPTZero.
 
• For students, the company says it only looks at general, anonymous info to make things better, and doesn’t use any of it for ads.

How Accurate and Reliable Is GPTZero Compared to Turnitin?

Is GPTZero accurate and how good is its detection?

• GPTZero says it's super accurate with a high hit rate for catching AI-only text, but lots of folks online find it sometimes gets it wrong, especially with fancy or creative writing.
 
• If you change up AI writing a bit by rewording or paraphrasing, GPTZero can get confused and might think it was written by a real person.
 
• It's common to see the tool mark student work or essays by non-native English speakers as AI, even if they didn’t use any bots at all.
 
• Understanding the results can be tricky, so don’t bet everything on what GPTZero tells you — use some common sense to check too.

How does GPTZero's accuracy compare to Turnitin?

• Turnitin mainly checks if text is copied from somewhere else, but GPTZero tries to figure out if the writing “sounds” like it came from a computer.
 
• GPTZero can spot some AI writing, but lots of experts say tools like Turnitin are still better at finding actual copy-paste jobs from the web.
 
• In tests and reviews, GPTZero sometimes misses AI text that’s been changed a bit, while Turnitin usually just shows a similarity score and won’t say if it’s AI or not.
 
• Turnitin is often used by teachers for spotting plagiarism, but is not made for picking up AI text like essays from ChatGPT, which is where GPTZero steps in.

Is GPTZero Free and What Is the Refund Policy?

What is the difference between GPTZero free vs paid?

• The free version lets you check some text, but you’ll hit limits on how much you can scan and what features you get, like fact checks or file uploads.
 
• Paid plans let you scan bigger files, upload more types of documents, check batches at once, and use extra tools made for schools or businesses.
 
• If you’re just checking here and there, the free plan is fine, but if you’ve got lots to scan or need more detailed stuff, you’ll probably want to pay.

How does the GPTZero refund policy work?

• There’s no clear refund promise, and many users say getting your money back is pretty much impossible, even if you cancel right away.
 
• When you cancel your subscription, you still get charged for the whole billing cycle, and any unused credits just disappear at the end of the month.
 
• If you’ve got a big business account, you may be able to ask for special terms, but everyone else just gets the same no-refunds situation.

Is GPTZero Safe and the Best AI Detector Available?

Is GPTZero safe and reliable to use?

• GPTZero follows strict privacy rules (like SOC 2 and GDPR), and says it won’t use your text for anything except checking it, so your info is supposed to stay safe.
 
• There’s a secure option for businesses that don’t want any of their data being sent out—everything can be checked on their own servers if needed.
 
• Most users don’t report issues with safety, but accuracy and reliability, especially for tricky or creative writing, can still be hit or miss.

Is GPTZero the best AI plagiarism detector?

• Some folks really like GPTZero for schools, but lots of tech reviews say it’s not the “best” at catching AI text compared to other new tools.
 
• Other tools like Winston AI or Originality.ai sometimes get better marks for accuracy, but even those aren’t perfect — all AI detectors make mistakes.
 
• It’s best to use these detectors with a grain of salt, since human judgment is still needed to decide what’s really going on with a piece of writing.

What Do Burstiness and Perplexity Scores Mean in GPTZero?

What are good burstiness and perplexity scores in GPTZero?

• There aren’t any magic numbers—higher burstiness and perplexity scores usually mean the writing is more “human” and unpredictable, but you have to look at them as a whole, not by themselves.
 
• A higher perplexity score means the text is harder for a computer to guess, which often happens with more original or creative writing.
 
• Burstiness is higher when sentences bounce around in length and style, kinda like how people naturally talk or write stories.

How do these scores affect plagiarism detection?

• They don’t actually catch copy-paste plagiarism, but these scores help guess if something “looks” like it was written by AI, which could be its own kind of cheating.
 
• If burstiness and perplexity are both really low, there’s a better chance the tool thinks it’s bot text, but human writing isn’t always high, especially in technical or simple stuff.
 
• To cover all bases, GPTZero also runs a regular plagiarism scan to check if any parts match things published online or in databases.

Is GPTZero Plagiarism Checker Legit?

• Reason #1: Nightmare Customer Support: If you ever run into payment or refund problems, don’t expect much help. Their team is slow to respond and often ignores you, so you just end up frustrated and feeling stuck with your money gone.
 
• Reason #2: Expensive and Wasteful Plans: You’re forced to pay for pricey monthly subscriptions, and any credits you don’t use just disappear. I’ve lost unused credits that I paid good money for—it’s the worst feeling!
 
• Reason #3: Mistakes All Over: Sometimes GPTZero flags your own original stuff as copied or AI-written, even when it’s not. It’s scary and makes you doubt your own work for no reason.

“Relies on technology.” ― fahimai

• #1 Super Accurate Plagiarism Checks: AIDetectPlus scans billions of sources and shows you the exact matches. You can fix the flagged stuff right away without guessing.
 
• #2 Credits Never Expire: Buy credits once, and they're yours forever. You only buy more if you need them, unlike GPTZero where unused credits just vanish.
 
• #3 Awesome Personal Support: I always get replies from real people in less than 12 hours. No getting ghosted or stuck chatting with useless bots!
 
• #4 All-in-One Platform for Every User: AIDetectPlus is your comprehensive solution, offering an AI detector, humanizer, plagiarism checker/remover, essay writer, paraphraser, and even PDF tools—all in one place. Whether you're a student, teacher, or blogger, you'll find exactly what you need to streamline your workflow. Discover all your options in the menu above.