GPTZero

GPTZero is an AI content detector that identifies machine-generated text and verifies human writing across multiple large language models.

GPTZero is an AI content detection platform designed for teachers, editors, recruiters, and institutions to identify AI-generated text and verify authentic writing. Users can paste raw text or upload documents to receive an overall AI score along with sentence-by-sentence analysis. The platform detects content from models including ChatGPT, GPT-4, GPT-5, GPT-6, Gemini, Claude, Llama, and Deepseek. Features include plagiarism detection, grammar checks, writing feedback, and video replay of the writing process. It integrates directly with tools like Google Docs, Google Classroom, Canvas, Zapier, and provides a Chrome extension for browser-based checks.

GPTZero at a glance

Best for: Student, Writer, HR
Runs on: Web, Chrome extension, API
Pricing: Freemium
Released: January 2023
Category: AI writing tool
Website: gptzero.me

Key features

Sentence-by-sentence AI detection
Plagiarism detector
Grammar check and feedback
Video proof of the writing process
Chrome extension for browser use
Learning management system integration

Use it for

Checking student essays for AI content
Verifying original writing for publishers
Screening candidate writing for recruiters
Checking documents inside Google Docs

Companions

Tools that articles about GPTZero recommend using with it, each with its job.

ChatGPT — Built to work with ChatGPT.
Gemini — Built to work with Gemini.
Canva — Create and edit designs and slides inside the chat.
Zapier — The largest app catalog for no-code automations and agents
Firecrawl — Provides direct web data access for AI agents with open source flexibility.
ElevenLabs — Text-to-speech, voice cloning and sound from the chat.

Alternatives to GPTZero

AI Text Detector — Analysis runs entirely in your browser to keep your text private.
AiSniff — Runs locally with no server, model calls, or data leaving the browser or CLI.
editGPT — It tracks changes with AI while keeping document formatting intact.
LangGPT — Turns scattered prompt tips into a structured, modular methodology.
LanguageTool — Detects grammar, spelling, and style errors across multiple apps and browsers.
Grammarly — Personalized AI guidance and text generation on any app or website.
Paperpal — Provides comprehensive research and writing assistance trained on scholarly work.
iwrote — Certifies human writing with a link showing how the text was typed.
WriterzRoom — Governed multi-agent pipeline with mandatory quality checks and evidence records.
DeepL — Delivers accurate, enterprise-grade translations while preserving original layout and context.
Quillbot — It uses artificial intelligence to rewrite and paraphrase text.
Writing DNA — It turns subjective writing styles into systematic, actionable rules for AI agents.

All GPTZero alternatives