GPTZero Reviews 

What a shit service?
I tried this but not good result so I didn't use and send email to support team about to delete my account.
But after that, every day send email to purchase failing emails and make me crazy.
Shit service

I signed up for a one-week free trial of GPTZero Premium. My trial invoice clearly states October 13–20, 2026, with a total of €0. However, I was charged €101.54 for an annual subscription on October 13—the very first day of the trial.

I expected to have a week to try the service before being charged. Receiving an annual charge immediately undermined my trust in the billing process.

The refund support article tells customers to contact support directly but does not provide an email address. I found one on my invoice, which confusingly also includes a Grammarly email address and payment instructions for Superhuman Platform Inc.

I am requesting a full refund and will update this review with the outcome.

Edit: They reacted within a day and send an email that within 10 business days i will receive my money back.
Set to two stars. Will up when money is received.

I never agreed to a paid or recurring subscription with GptZero, yet my credit card was charged without my consent for a yearly subscription twice.

Do not use GPTZero. In my experience, they charge your credit card without your consent. Stay away and protect your card.

I would rate it less if I could. No notifications as to when the next charge is coming out of your account. If youre trying to cancel, good luck. Not only did they show me 10 "are you sure you want to cancel" screens on their own site, you have to go to Stripe to continue your cancellation, where they show you an additional 4. Incredibly disappointed with this service, it is not put together, it is not going to do what you want it to do and it is not worth more than a ChatGPT subscription per month. Save yourself the hassle and dont get this service.

I am extremely disappointed with GPTZero's billing transparency. I signed up intending to use the service for just a couple of months. However, the checkout and pricing structure are highly misleading. Instead of charging monthly, they immediately debited a full annual subscription fee all at once, without clear and upfront communication during the payment process.Because of this hidden trap, I am now stuck with a year-long subscription I do not want, and I have spent way more money than I ever intended to. The lack of clear communication regarding these upfront annual costs feels dishonest.If you are planning to use this tool short-term, be very careful. They will take your money for the whole year upfront without making it explicitly clear. I would highly recommend looking for alternatives with fairer and more transparent billing practices.

this is an incredibly bad product. it flags anything that is written correctly or in an academic matter as A.I. it flaggs things that are directly aligned with academic standards as A.I or citations as A.I

I highly disregard the use of this shit company product.

I paid for a subscription and it kept telling me to upgrade and could only use 50 000 characters, but ate up all my credits for the entire text. Useless and not legit, money making racket. And when you complain you get an AI message from them saying they will cancel you subscription, so they charge you, take your money and then when you complain that you not getting anything they cancel your subscription. its a scam!

The actual program works great however they will not let you cancel. I have mulitple emails from them confirming they cancelled my account and I wouldn't be charged again. However they continue to charge over and over again. Had to report my card stolen and dispute the charge.

Do not trust the company.

I tested several English texts. Some were entirely AI-generated, some were partially AI-generated, and some were written entirely from scratch by me (I should point out that English is my second language). Every single text was flagged as 100% AI-generated! That's extremely concerning, particularly because many teachers I know rely on detection tools like this to support their suspicions that a student's work is not entirely their own. Falsely accusing someone of using AI to write an assignment is unacceptable on all levels.

There's a little something called accountability. If a detection algorithm produces results this unreliable, GPTZero should be taken offline until the system actually works as intended.

PS! I even tested with this exact review for fun, and the tool claimed it was partially AI. Well, at least it wasn't 100% AI, which is comforting. Not.

Software worked as promised, it gave me great suggestions for my writing and the support team was really helpful when it came time to cancel.

Absolutely the worst AI detector around. I put in a children's book I wrote in the 1970s and it's telling me it's 100% AI! Don't waste your time or money on this lousy program. Also, put in Dr. Suess and it comes back as AI as well.

Seems to be a scam

They charged me over €150, I don’t have an account and any trial period was cancelled on time. Reported them to my credit card company and blocked my card.

Everything is 100% AI. #LOL Don't waste your money on this crappy website. Garbage.

This website is crimeful! How? The system doesnt take in consideration about copy right laws! What ever permision! It just does what it must! The agent needs justification to know whats copy right and on what/which document it can go arounf! This leads to crimes cause no restriction. Of course it makes the website more attractive too but on the wrong path.

They combine the least accurate tool on the market with the absolutely worst support. In fact it's not short of a scam, I got overcharged by 60Euros (which is very easy to verify from their backend) but all I get from the support is gaslighting.. Do no put your credit card in this thing there are many better alternatives out there

This is probably one of the worst AI checkers I have utilized throughout my entire academic life. Not only does it constantly suffer from severe lag, inaccuracies, and intangibility, but it also actively punishes authentic students by weaponizing flawed metrics against honest, hard-earned writing.

My natural academic writing style is constantly being misidentified as AI-generated, which proves this software is unreliable and should be abolished.

I had a highly unsatisfactory experience with the cancellation process for my subscription. It was incredibly difficult to navigate, and I ended up losing a significant amount of money. When I reached out to customer service to express my concerns, I received a response that was both cold and unhelpful ,no apologies or accountability were offered. I definitely do not recommend this website to anyone.

Additionally, the website itself was misleading, highlighting incorrect information and providing poor feedback. I attempted to share my own feedback, but it felt like a complete waste of my time. Overall, I'm very disappointed.

Always says 100% AI generated even when it is not. It will always say it is AI generated unless it's written by an elementary schooler.

Unreliable, it simply throws guesses with high confidence and it's often wrong, it's useless when you can expect the writer to be better than an elementary school child.