Gptzero

Gptzero

GPTZero is an AI content detection platform designed to identify text generated by large language models (ChatGPT, GPT-5, Gemini, Claude, Llama, etc.), verify authorship, detect hallucinated citations, check plagiarism and grammar, and provide in-depth writing reports for educators, publishers, and organizations.

Gptzero is ai detection software teams evaluate for education & research. Use this page to review pricing, integration signals, and the best alternatives before you commit.

Freemium API Enterprise 80/100
#31 in AI Detection (31 tools)
Added 4 months ago
18312 directory views this week

Quick Overview

Best for: Education & Research

What it does

AI Detection software for decision-makers comparing workflow fit and alternatives.

Best fit

Education & Research

Pricing snapshot

Freemium from Free

Next step

Compare Gptzero with similar tools before you shortlist it.

Compare this tool before you shortlist it

Review alternatives, pricing posture, and workflow fit side by side.

Gptzero

GPTZero is a commercial AI detection and writing-assessment platform built to preserve human authorship and help organizations surface AI-generated content. It detects text from a wide range of LLMs (ChatGPT, GPT-5, GPT-4, Gemini, Claude, Llama, and others), provides sentence-level and document-level AI probability scoring, and offers supplementary tools like hallucination detection, plagiarism checking, grammar correction, and authorship verification. The product is targeted at educators, students, writers, recruiters, publishers, security teams, and ML engineers seeking reliable detection, writing feedback, and integrations into existing workflows.

GPTZero emphasizes interpretability (color-coded sentence-level highlights and natural-language explanations), research-backed accuracy (independent benchmarks claiming industry-leading accuracy), and classroom- and enterprise-ready integrations (Chrome, Google Docs, Canvas, Zapier, API). It also offers premium features such as video replay of the writing process, advanced insights, and deeper plagiarism scanning.

GPTZero is an AI content detection platform designed to identify text generated by large language models (ChatGPT, GPT-5, Gemini, Claude, Llama, etc.), verify authorship, detect hallucinated citations, check plagiarism and grammar, and provide in-depth writing reports for educators, publishers, and organizations.

Own this listing?

Claim this page to add pricing, features, screenshots, and verified owner details.

Claim this listing

Key Features

AI Detector

Detects AI-generated text across major LLMs and provides percentage likelihood and highlighted phrases indicating AI usage.

Advanced AI Scan

In-depth results and advanced accuracy scanning aimed at reducing false positives and improving detection across modern LLMs.

AI Vocabulary

Identifies commonly used AI words and vocabulary patterns within a document.

Hallucination Detector

Detects hallucinated or fabricated citations and fake academic sources in text.

Plagiarism Checker

Searches for content copied from outside sources to ensure originality and proper attribution.

Grammar Checker

Provides grammar and spelling corrections and basic writing feedback.

Authorship Verification & Video Proof

Options to verify authentic human authorship including video replay of the writing process (premium feature) and other verification metrics.

AI Grader and Writing Report

Grades writing and delivers detailed feedback to speed instructor grading and provide student-focused guidance.

Sentence-level Interpretability

Color-coded sentence-level detection and natural-language explanations showing why text is classified as AI.

Multi-component Detection Model

A proprietary model composed of multiple components that analyze perplexity, burstiness, style, and hundreds of factors to maximize accuracy and reduce false positives.

ESL De-biasing

Model training and bias mitigation specifically aimed at reducing false positives for English-as-a-second-language writers.

Pricing

Free Tier Available

Free tier available: basic AI detection, free grammar check, Google Docs extension, and ability to scan text (account required for scans over 10,000 characters).

Free

Free
  • Basic AI detection and sentence-level highlights
  • Free grammar check and basic writing feedback
  • Google Docs extension (free)
  • Ability to sign up and run scans (account required for long scans)

Premium / Paid

Not publicly listed on provided content β€” upgrade required (contact sales or sign in to view plans)
  • Advanced AI Scan with higher insights and accuracy
  • Video proof of writing process (video replay)
  • Advanced insights and deeper plagiarism detection
  • Enterprise features and dedicated integrations

Enterprise / Teams

Contact sales
  • LMS integrations (Canvas, Google Classroom) and admin dashboards
  • Dedicated support, SLAs and deployment assistance
  • API access and bulk/enterprise licensing

Use Cases

For Teachers & Educational Institutions

Foster academic integrity, integrate detection into LMS (Canvas, Google Classroom), and use sentence-level reports and video replays to guide student conversations.

For Students

Improve writing with grammar feedback, avoid false accusations via transparent reports, and verify authorship where required.

For Writers & Publishers

Ensure writing sounds authentic, check for AI influence, and preserve trust with clients or readership using interpretable reports.

For Recruiters & Hiring Teams

Screen written submissions and interview responses to prioritize human applicants over AI-generated responses.

For Cybersecurity Teams

Detect AI-generated phishing or social-engineering text used in attacks and strengthen defense against AI-driven threats.

For ML Engineers & Researchers

Validate datasets, detect synthetic content in training data, and access API/integration support for research and model training.

Integrations

Chrome extension

Scan web pages and see AI detection and typing-pattern metrics while browsing.

Google Docs

Verify authorship and view detection metrics directly inside Google Docs (extension/add-on β€” Google Docs integration is free).

Canvas / Learning Management Systems

Integrate AI detection into Canvas and other LMS platforms for assignment scanning and classroom workflow.

Zapier

Create no-code workflows to automate AI detection and alerts across systems.

API

Integrate GPTZero's industry-leading AI detection model programmatically (API access mentioned for researchers and enterprises).

Benefits

High reported accuracy with independent benchmarks (claims up to 99% for modern LLMs and strong performance on mixed documents).
Interpretable, sentence-level detection with color-coded highlights and natural-language explanations to support fair use and discussion.
Classroom- and enterprise-friendly integrations (Chrome extension, Google Docs, Canvas, Zapier, API) to embed detection into existing workflows.
Premium verification features (video replay of writing process) for stronger provenance and authorship confidence.
Bias mitigation for ESL writers and multi-language support (English, German, Portuguese, French, Spanish) to reduce false positives.

Limitations

No detector is 100% accurate; GPTZero recommends using results as part of a broader review rather than the sole basis for punishment.
Accuracy is higher on longer, document-level inputs and strongest on English prose; sentence-level results are inherently noisier.
AI models evolve rapidly β€” detection effectiveness may vary over time and requires continual retraining and dataset updates.
Specific pricing details and API documentation were not provided in the supplied content.

Frequently Asked Questions

What is GPTZero?
GPTZero is an AI detector that identifies content generated by large language models (LLMs) and provides tools to verify authorship, detect hallucinations and plagiarism, and give writing feedback. Founded in January 2023, it serves millions of users across education, hiring, publishing, legal and more.
How does AI detection work?
AI detectors analyze text patterns such as perplexity, burstiness, and style. GPTZero uses a proprietary multi-component model that considers hundreds of factors (including perplexity and stylistic signals) to determine the likelihood text was produced by an LLM.
Is GPTZero accurate?
According to independent benchmarks and GPTZero's reporting, the platform achieves industry-leading accuracy (claims up to 99% for modern LLMs). Results were validated on third-party benchmarks (RAID) and in academic collaborations, though no detector is 100% perfect.
How do I use GPTZero's AI detection tool?
Paste text or upload a document and press 'Scan'. For scans over 10,000 characters, create a free account. Results show the percentage of AI-generated content and highlight specific phrases. Extensions for Chrome and Google Docs allow in-context scanning.
Which languages does GPTZero support?
GPTZero fully supports English, German, Portuguese, French and Spanish and is used in many other languages across 100+ countries.
Who should use GPTZero?
GPTZero is intended for educators, students, writers, recruiters, publishers, cybersecurity teams, ML engineers, and organizations that need trusted detection of AI-generated content.
What are the limitations of AI detectors?
No AI detector is 100% accurate. Accuracy improves with longer inputs and is strongest on English prose. Results should inform conversations rather than serve as final punitive evidence. GPTZero works to reduce false positives, particularly for ESL writers.

Getting Started

  1. 1 Step 1: Paste text or upload a document into the AI Detector interface and press 'Scan'.
  2. 2 Step 2: For scans over 10,000 characters, create a free account (sign up on the site).
  3. 3 Step 3: View results with percentage likelihood, phrase-level highlights, and download or share reports. Optionally install Chrome extension or connect Google Docs/Canvas for real-time scanning.

Support

Docs / Help Center

Online help articles, FAQs, troubleshooting and educational resources available on the website.

Contact Form / Sales

Contact sales or support via the website contact form for demos, enterprise inquiries and account help.

Research & Academic Support

Support and API access for academics and researchers is available (contact for details).

API

Available: Yes
Documentation:

Not available in provided content (API access and integrations are mentioned; contact sales or support for documentation).

Rate Limits:

Not available in provided content

Compare Gptzero with similar tools

See how it stacks up against alternatives

Related Tools

View all 31 β†’
Freemium
Gowinston

Gowinston

Gowinston (Winston AI) is an AI content detection and integrity platform that identifies AI-generated text and images, checks for plagiarism, provides writing feedback, and offers an API for integrations. It targets educators, publishers, SEO teams, and writers who need reliable content authenticity checks.

AI Detection
Contact for pricing
Humanizeai

Humanizeai

Humanizeai (branded as ShadowGPT on the page) is presented as a tool to bypass AI detection and optimize text, according to the page title. Additional product details were not provided in the supplied content.

AI Detection
Freemium
Originality

Originality

Originality.ai is a suite of QA/QC content tools centered on an industry-leading AI detector, plus plagiarism, fact-checking, readability, grammar checking, content optimization, and bulk site scanning designed for writers, publishers, educators, and enterprises.

AI Detection
Freemium
Undetectable

Undetectable

Undetectable AI provides a free AI content detector and humanizer that assesses whether text (and images via a separate tool) is AI-generated, aggregates scores from multiple detectors, and offers tools to rewrite or 'humanize' flagged content for safer publication.

AI Detection
Freemium
Apps

Apps

TrustCheck AI is a mobile app that verifies images, text, links and screenshots in seconds using built-in AI to detect deepfakes, manipulations, scams and phishing without prompts or technical setup.

AI Detection
Contact for pricing
currux-vision-ai-driving-assistant

currux-vision-ai-driving-assistant

Currux Vision provides autonomous AI systems designed for smart infrastructure, focusing on intelligent transport systems, traffic monitoring, and enforcement to help cities and government agencies optimize and monetize complex infrastructure projects.

AI Detection
Free
Textshift

Textshift

TextShift is an AI content detection, humanization, and plagiarism-checking platform that claims industry-leading 99% accuracy and non-expiring credits. It targets users who need to verify and refine written content.

AI Detection
Contact for pricing
Plagiarismchanger

Plagiarismchanger

Information about Plagiarismchanger is not available in the provided content.

AI Detection

Premium Alternatives

Paid
Vellum

Vellum

Vellum is a platform for building, running, and managing AI agents that automate operational workflows by connecting to your apps and data (e.g., Notion, Slack, Salesforce, Google Drive). It targets product, marketing, finance, sales, legal, and customer support teams looking to automate repetitive processes.

AI Agents
Enterprise-ready
Paid
PromptPack 100

PromptPack 100

PromptPack 100 offers 100 ready-to-use ChatGPT prompts designed specifically for entrepreneurs, startup founders, and small-business owners to save time, think bigger, and build faster by leveraging AI.

Marketing Artificial Intelligence
Paid
jupid-ai-accountant

jupid-ai-accountant

Jupid is an AI-powered accounting platform designed for small businesses, offering LLC formation, bookkeeping, tax filing, and ongoing financial management through natural language chat interactions.

Finance
Paid
Smart AI Offer Builder

Smart AI Offer Builder

Smart AI Offer Builder is an AI-powered platform designed to help businesses create compelling offers that increase sales by up to 10x without changing the product. It enables users to design offers, optimize pricing, and leverage urgency and bonuses to boost conversions.

Marketing Marketing
Paid
Aiportraitgen

Aiportraitgen

AI Portrait Gen is a web-based generator that creates realistic, high-quality AI portrait photos from a few user-supplied images. Users pick outfits, locations and styles, pay per-use with credits, and receive professional-looking portraits for profiles, social, or personal use.

Image & Design
Paid
Flux-kontext

Flux-kontext

FLUX Kontext is an instruction-based AI image editor that performs targeted, surgical edits specified by natural-language instructions while preserving the rest of the image. It’s designed for creators, designers, and marketers who need precise, iterative image modifications with character consistency and commercial usage rights.

Image Editing
High-growth
Paid
question-base

question-base

Question Base is an AI-powered answer agent integrated with Slack that automatically responds to repetitive internal questions by searching verified documentation and knowledge bases, helping teams save time and improve knowledge management.

Chatbots & Assistants
Paid
Moreseo

Moreseo

MoreSEO was an AI-driven platform that generated, optimized, scheduled, and auto-published SEO blog posts across multiple CMS and sites with manual or fully-autopilot modes. (Note: MoreSEO is discontinued and not available for new users.)

SEO
Enterprise-ready

Explore Related Categories

Explore by Outcome