GPTZero
Plagiarism checker software
Generative AI software
Synthetic media software
AI content detectors software
- Features
- Ease of use
- Ease of management
- Quality of support
- Affordability
- Market presence
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$10 per month
Free TrialFree version
Small
Medium
Large
- Education and training
- Public sector and nonprofit organizations
- Healthcare and life sciences
What is GPTZero
GPTZero is an AI content detection tool that analyzes text to estimate whether it was likely written by a human or generated by a language model. It is used by educators, academic integrity teams, and publishers to review student submissions and other written content for potential AI authorship. The product focuses on text-based detection with scoring and highlighting to support review workflows, rather than providing writing or paraphrasing features.
Purpose-built AI text detection
GPTZero centers on identifying likely AI-generated text and presenting an overall assessment rather than bundling broad writing-assistant capabilities. This focus can simplify evaluation workflows for users who primarily need AI authorship signals. It supports use cases such as screening assignments, articles, and other long-form text for potential AI generation.
Actionable reporting and highlights
The product provides scores and sentence-level indicators to show where text appears more likely to be AI-generated. These cues help reviewers target manual follow-up instead of relying only on a single pass/fail output. This is useful in academic and editorial settings where decisions require documentation and human judgment.
Fits integrity review workflows
GPTZero is commonly positioned for education and content review teams that need repeatable checks across many documents. It can be used as a screening layer alongside plagiarism review and policy-based evaluation. This complements tools in the broader writing and originality space that emphasize grammar, paraphrasing, or similarity matching.
Detection accuracy is probabilistic
AI authorship detection is inherently uncertain and can produce false positives and false negatives, especially with edited AI text or highly formulaic human writing. Results typically require human review and supporting context rather than being treated as definitive proof. Organizations often need policies that define how detector outputs may be used in disciplinary or editorial decisions.
Limited scope beyond text
Despite being adjacent to synthetic media concerns, GPTZero primarily addresses text and does not function as a general detector for images, audio, or video. Teams looking for broader synthetic media verification may need additional tools and processes. This can increase operational complexity for organizations managing multiple content modalities.
Not a full plagiarism solution
AI detection and plagiarism/similarity checking address different risks: AI authorship versus copied sources. GPTZero does not replace a traditional similarity index against web and publication databases. Many users still require a separate plagiarism checker to cover citation, copying, and source attribution workflows.
Plan & Pricing
| Plan | Price | Key features & notes |
|---|---|---|
| Free | $0/month | Up to 10,000 words/month; basic AI detection, limited scans/hour, access to Chrome extension, basic plagiarism checks (per site). |
| Essential | $10/month | Up to 150,000 words/month; advanced AI detection, plagiarism scanning, advanced grammar & writing feedback, batch file scanning limits (per site). (Site notes: these prices have been presented as monthly equivalents when billed annually.) |
| Premium | $16/month | Up to 300,000 words/month; advanced AI deep scan, multilingual detection, download AI reports, unlimited scans per hour (per site). |
| Professional | $23/month | Up to 500,000 words/month; higher limits and organisational features, team management, overage allowances (per site). |
API / Developer (usage-based) — official developer pricing (on same vendor site): Pricing model: Tiered monthly plans (fixed monthly base for word allotment; additional usage charged per million words). Pricing (as listed on GPTZero developers page):
- 300k words/month — $45/month.
- 1M words/month — $135/month.
- 2M words/month — $250/month.
- 5M words/month — $550/month.
- 10M words/month — $1000/month.
- 20M words/month — $1850/month. Overage / additional usage: $150 per additional 1M words (per site developer pricing). Notes: API plans include batch uploads, character limits per document, and access to GPTZero premium detection models (per the developers page).
Seller details
GPTZero, Inc.
New York, NY, USA
2023
Private
https://gptzero.me/
https://x.com/gptzero_me
https://www.linkedin.com/company/gptzero/
