ZeroGPT review

ZeroGPT has the lowest paid entry price in this list. The free plan needs no credit card and checks up to 15,000 characters at a time. Pro costs $8.99 a month on annual billing, $107.88 a year, or $14.99 monthly, and raises each check to 100,000 characters with batches of 50 files, PDF reports, detection history and an ad-free experience. Plus at $13.99 and Max at $19.99 add monthly plagiarism allowances of 35,000 and 60,000 words, and Business and EDU plans are sold on the same page. Paid plans also include a summarizer, paraphraser, grammar checker, chat assistant and a humanizer, so ZeroGPT is as much a writing toolkit as a detector. For editors that bundle matters less than the detector's limits, and Pro includes only a one-time 750 words of plagiarism checking. We compared documented features and published prices.

Who it is for

Budget buyers who want the cheapest paid AI detector

Price

Free plan with 15,000 characters per check; Pro $8.99 per month billed annually.

PRO $ 8.99 /month $14.99 /month $107.88 /year
Quoted from the vendor pricing page on November 12, 2026.

Key features

• Free plan checks up to 15,000 characters at a time
• Pro checks 100,000 characters and 50 batch files
• PDF reports and detection history on paid plans
• Pro allows 4,500,000 detection words a month
• EDU plan with 250,000 characters per check

Strengths and weaknesses

• Strength: Cheapest paid plan in this list at $8.99 a month billed annually
• Strength: Free plan needs no credit card
• Strength: Business and EDU plans sold self-serve
• Weakness: Pro includes only a one-time 750 words of plagiarism checking
• Weakness: Paid plans also bundle a humanizer, which some schools may not want
• Weakness: Monthly Pro billing costs $14.99

Key facts

• Free plan: Yes, 15,000 characters per check
• Pro check length: 100,000 characters
• Pro batch files: 50

Where it ranks

ZeroGPT is No. 9 in our Best AI Detectors verdict.