GPTZero records 23,246,989 monthly visits with +32.5% month-over-month growth and Freemium, Paid pricing. UserAPI.ai records 5,163,985 monthly visits with +1.6% growth and Freemium, Paid pricing.
AI detection and writing verification built for schools and editors
Unofficial Midjourney API — generate images from your own app.
| Dimension / Metric | | |
|---|---|---|
| Official Domain | gptzero.me | userapi.ai |
| Pricing Model | Freemium, Paid | Freemium, Paid |
| Monthly Visits | 23.25M (23,246,989) | 5.16M (5,163,985) |
| MoM Traffic Delta | +5.7M (+32.5%) | +83.76K (+1.6%) |
| Primary Market & Share | 🇺🇸 United States (54%) | 🇺🇸 United States (13.3%) |
| Direct Visits / mo | 7.53M | 3.81M |
| User Rating | 4.1 | 4.2 |
| Supported Platforms | Website | Website |
AI detection and writing verification built for schools and editors
Paste text or upload a document and get an overall AI probability score plus a sentence-by-sentence breakdown of which parts look machine-written.
Flags AI text from major model families including ChatGPT, Gemini, Claude, Llama, and others, rather than training for a single model.
A Chrome extension and Google Docs add-on bring scanning into Gmail, Docs, Classroom, and other surfaces you already work in.
Checks content for copied passages from outside sources so you can separate AI-generation questions from originality questions.
Unofficial Midjourney API — generate images from your own app.
Call Imagine, Upscale, Variation, Blend, Describe, Animate, Upsample, Pan and Inpaint through a REST API for scripted image generation.
Generate without a Midjourney subscription or Discord token by running on UserAPI Cloud accounts, with failed tasks refunded automatically.
Manage multiple image generation accounts, schedules and keys from a single admin panel.
Ready code samples for Python, Node.js and PHP, plus official integrations for n8n and Make.com automations.
Enterprise developer platform and API for deploying GPT-6 Astra, Sol, Luna, and realtime multimodal agents.
Enterprise developer platform and API for deploying GPT-6 Astra, Sol, Luna, and realtime multimodal agents.
Offers broad multilingual AI detection and text humanization, but lacks GPTZero's detailed deep-scan reporting features.
Offers broad multilingual AI detection and text humanization, but lacks GPTZero's detailed deep-scan reporting features.
SpecialistCombines AI detection with professional human proofreading and citation tools, but functions primarily as an editing service.
SpecialistCombines AI detection with professional human proofreading and citation tools, but functions primarily as an editing service.
SpecialistCombines AI detection with robust text humanization tools, but focuses more heavily on rewriting than pure verification.
SpecialistCombines AI detection with robust text humanization tools, but focuses more heavily on rewriting than pure verification.
One API for 1,500+ production-ready generative media models
Provides robust enterprise-grade content integrity and cross-media detection, but can be more expensive for individual users.
Provides robust enterprise-grade content integrity and cross-media detection, but can be more expensive for individual users.
Delivers strong fact-checking and comprehensive site-wide plagiarism audits, but has stricter paywalls than GPTZero.
Delivers strong fact-checking and comprehensive site-wide plagiarism audits, but has stricter paywalls than GPTZero.
Run, fine-tune, and deploy machine learning models with one line of code
Run, fine-tune, and deploy machine learning models with one line of code
SpecialistOne free API for text, image, and video AI models
Provides detailed sentence-level analysis for multilingual text, but lacks GPTZero's broad academic brand recognition.
Provides detailed sentence-level analysis for multilingual text, but lacks GPTZero's broad academic brand recognition.
One OpenAI-compatible API for 500+ image, video, audio, and LLM models
One OpenAI-compatible API for 500+ image, video, audio, and LLM models
Excels at scanning both text and images with high accuracy, but offers fewer free daily checks than GPTZero.
Excels at scanning both text and images with high accuracy, but offers fewer free daily checks than GPTZero.
