Best GPTZero alternatives

Comparison

Tool	Price from	Free plan	Category
GPTZero	not listed	yes	AI detectors
Turnitin	not listed	?	AI detectors
Undetectable AI	5.00 USD/mo	trial	AI detectors
Copyleaks	13.99 USD/mo	trial	AI detectors
Originality.ai	12.95 USD/mo	yes	AI detectors
ZeroGPT	not listed	yes	AI detectors
Scribbr	19,95 USD	?	Education
AI or Not	5 USD/mo	yes	AI detectors
Pangram	20 USD/mo	trial	AI detectors

Each alternative in short

1. Turnitin

Academic integrity platform that detects plagiarism and AI-generated writing and supports grading and feedback for schools and universities.

The vendor does not state this clearly on the homepage or pricing page.

2. Undetectable AI

Detects AI-generated text and images and rewrites AI writing so it reads as human, for students, writers and professionals.

There is a free trial. Free trial limited to 250 words; additional usage requires a paid plan.

3. Copyleaks

Detects AI-generated and plagiarized text, images, and video, mainly for schools, publishers, and enterprises protecting content and IP.

There is a free trial. Free start for students (Start for Free / Start now for free); scan credits are limited on the individual plans.

4. Originality.ai

AI detector and content checker that flags AI-generated text and plagiarism for writers, editors, teachers and publishers.

Yes, there is a free plan. Basic plan with AI detection only: 3 scans per day, limit of 2,000 words per scan, file upload (docx, pdf, doc). No subscription required.

5. ZeroGPT

Online AI content detector that flags AI-written text and images, plus paraphrasing, grammar and plagiarism tools for writers, students and educators.

Yes, there is a free plan. Free plan, no credit card needed, with limited access to the tools (the 15,000-character limit shown on the homepage applies to the detector input).

6. Scribbr

Academic writing platform offering plagiarism and AI-content checks, proofreading, citation generation and writing tools for students.

The vendor does not state this clearly on the homepage or pricing page.

7. AI or Not

Detects AI-generated text, images, music, video and deepfakes, for individuals and businesses via web or API.

Yes, there is a free plan. 5 USD in free credits, 1M words of AI text detection per month, 20 AI image checks and an API key included.

8. Pangram

AI detector that flags text and images likely generated by ChatGPT, Claude, Gemini and other models, for educators, publishers and organizations.

There is a free trial. Free tier with limited free scans (3 image scans per day shown); the Individual plan starts with a 7-day free trial.

FAQ