# GPTZero vs ImageBlock GPTZero records 23,246,989 monthly visits with +32.5% month-over-month growth and Freemium, Paid pricing. ImageBlock records 0 monthly visits with — growth and Free pricing. | Metric | [GPTZero](https://openaitools.app/tool/gptzero-me) | [ImageBlock](https://openaitools.app/tool/imageblock) | | :--- | :--- | :--- | | Website URL | https://gptzero.me | https://chromewebstore.google.com/detail/imageblock/knmlebbaohjjiomfeljjdbakiiggjabm | | Categories | AI Detector, AI Checker, AI Content Detector, AI Plagiarism Checker | AI Image Detector, AI Image Recognition, AI API | | Pricing Model | Freemium, Paid | Free | | Monthly Visits | 23,246,989 | 0 | | MoM Growth Rate | +32.5% | — | | Primary Market | United States | Global | | Direct Visits | 7,529,349 | 0 | | Review Score | 4.1 | 1.6 | | Saved Count | 41 | 0 | | Supported Platforms | Website | Browser Extension | ## GPTZero GPTZero grew out of the practical problem that teachers and editors faced once generative text became common: how do you tell whether a piece of writing came from a person or a model? The product answers that with a detector that returns an overall AI likelihood score and highlights individual sentences it considers machine-written, so a reader can see where the suspicion comes from rather than just receiving a single verdict. Over time the platform widened from a single text box into a suite aimed at institutions. Detector results are paired with a plagiarism checker, grammar and writing feedback, and optional process verification such as a writing replay that records how a document was typed. A Chrome extension and Google Docs add-on push detection into the tools students and staff already use, and the company offers classroom integrations plus an API for bulk or programmatic checks. Because the buyers are largely schools, districts, and universities, GPTZero leans heavily on privacy and compliance claims: it states SOC 2 Type II compliance and alignment with FERPA, GDPR, and CCPA, and says student writing is not used to train models. The practical takeaway is that it is positioned as an academic-integrity and editorial-review tool rather than a novelty checker, which also means its more powerful features sit in paid tiers. **Pricing & Plans:** Freemium plus paid plans. A free tier provides core detection with character limits per scan, while paid individual and institutional plans unlock advanced scan modes, higher limits, writing reports, and classroom integrations. Enterprise and API access are quoted separately. - **Sentence-level AI detection:** 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. - **Multi-model coverage:** Flags AI text from major model families including ChatGPT, Gemini, Claude, Llama, and others, rather than training for a single model. - **Browser and docs extensions:** A Chrome extension and Google Docs add-on bring scanning into Gmail, Docs, Classroom, and other surfaces you already work in. - **Plagiarism checking:** Checks content for copied passages from outside sources so you can separate AI-generation questions from originality questions. - **Writing process verification:** Writing replay and advanced reports offer evidence about how a document was produced, useful for academic integrity workflows. **Strengths:** Sentence-level highlighting shows why a passage was flagged instead of only giving a score; Covers text from many different AI model families, not just one chatbot; Integrations with Chrome, Google Docs, Canvas, and Google Classroom fit existing school workflows; Publishes concrete compliance claims (SOC 2 Type II, FERPA, GDPR, CCPA) that institutions can review **Limitations:** Detection is probabilistic and can flag polished human writing or miss lightly edited AI text; Free scans are capped by character count, and useful reporting features require payment; Lean heavily on a single score without human judgment can lead to unfair accusations [Profile (Markdown)](https://openaitools.app/tool/gptzero-me.md) ## ImageBlock ImageBlock is a small browser utility for people who want more control over what images appear while they browse. Instead of blocking everything or nothing, you set filters and let Google's Vision AI decide whether each image matches. The extension checks images against your criteria and hides the ones you no longer want to see. Setup centres on your own API credentials. You create a Google Cloud project, enable the Vision API, generate an API key, and paste that key into the extension's popup window. From then on, the extension can classify images as you load pages. Because it relies on Vision AI, blocking decisions can be based on image content rather than crude rules like dimensions or file paths. The extension is intentionally minimal and still early in its development, with its listing noting that more features are planned. It reports very small install numbers and has only a single rating, so it is best suited to users who are comfortable configuring a Google Cloud API key themselves, and to anyone exploring the idea of content-aware image filtering in the browser. **Pricing & Plans:** The extension itself is free to install from the Chrome Web Store. Because it uses your own Google Cloud Vision API key, any usage costs come from Google Cloud's Vision API pricing rather than from the extension author. - **Content-aware image blocking:** Hides images based on what Google's Vision AI detects in them, rather than on filenames or dimensions alone. - **User-defined filters:** You choose the criteria; the extension evaluates each image against the filters you set. - **Bring-your-own API key:** Works with your own Google Cloud Vision API key, entered through a simple popup window. - **Runs while you browse:** Applies filtering automatically as pages load, without a separate dashboard or workflow. - **Privacy-conscious design:** The developer discloses that the extension does not collect or sell your data. **Strengths:** Free to install and simple to configure through a popup; Uses Google Vision AI for content-aware, rather than rule-based, blocking; No account required — it runs on your own Google Cloud API key; Developer discloses that no user data is collected or sold **Limitations:** Requires you to set up and pay for your own Google Cloud Vision API key; Marked as early-stage, with limited features and a very small user base; Still a small, single-purpose extension with minimal support [Profile (Markdown)](https://openaitools.app/tool/imageblock.md) ## Frequently Asked Questions ### How do GPTZero and ImageBlock compare in monthly traffic? GPTZero has 23,246,989 monthly visits, while ImageBlock has 0. Traffic estimates describe audience size, not product quality. ### How do their growth rates compare? GPTZero has a month-over-month growth rate of +32.5%; ImageBlock has —. ### How does pricing compare? GPTZero: Freemium, Paid. Freemium plus paid plans. A free tier provides core detection with character limits per scan, while paid individual and institutional plans unlock advanced scan modes, higher limits, writing reports, and classroom integrations. Enterprise and API access are quoted separately. ImageBlock: Free. The extension itself is free to install from the Chrome Web Store. Because it uses your own Google Cloud Vision API key, any usage costs come from Google Cloud's Vision API pricing rather than from the extension author. ## Alternatives | # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | 1 | [ZeroGPT](https://openaitools.app/tool/zerogpt) | 32,864,541 | +19.7% | Freemium, Paid | Offers broad multilingual AI detection and text humanization, but lacks GPTZero's detailed deep-scan reporting features. | [.md](https://openaitools.app/tool/zerogpt.md) | | 2 | [Scribbr](https://openaitools.app/tool/scribbr) | 7,530,803 | +14.6% | Freemium | Combines AI detection with professional human proofreading and citation tools, but functions primarily as an editing service. | [.md](https://openaitools.app/tool/scribbr.md) | | 3 | [Undetectable AI](https://openaitools.app/tool/undetectable-ai) | 3,113,403 | +17.5% | Freemium | Combines AI detection with robust text humanization tools, but focuses more heavily on rewriting than pure verification. | [.md](https://openaitools.app/tool/undetectable-ai.md) | | 4 | [Copyleaks](https://openaitools.app/tool/copyleaks) | 2,402,494 | -14.1% | Paid, Contact for Pricing | Provides robust enterprise-grade content integrity and cross-media detection, but can be more expensive for individual users. | [.md](https://openaitools.app/tool/copyleaks.md) | | 5 | [Originality.ai](https://openaitools.app/tool/originality) | 2,049,639 | +2.8% | Paid | Delivers strong fact-checking and comprehensive site-wide plagiarism audits, but has stricter paywalls than GPTZero. | [.md](https://openaitools.app/tool/originality.md) | | 6 | [Isgen AI Detector](https://openaitools.app/tool/isgen-ai) | 901,917 | +5.8% | Freemium | Provides detailed sentence-level analysis for multilingual text, but lacks GPTZero's broad academic brand recognition. | [.md](https://openaitools.app/tool/isgen-ai.md) | | 7 | [Winston AI](https://openaitools.app/tool/winston-ai) | 604,454 | +5.4% | Freemium, Free Trial | Excels at scanning both text and images with high accuracy, but offers fewer free daily checks than GPTZero. | [.md](https://openaitools.app/tool/winston-ai.md) | | 8 | [Detecting-AI.com](https://openaitools.app/tool/detecting-ai-com) | 505,146 | +493% | Freemium, Paid | AI detector that highlights evidence, not just a score | [.md](https://openaitools.app/tool/detecting-ai-com.md) | | 9 | [PlagiarismCheck.org](https://openaitools.app/tool/plagiarismcheck-org) | 368,384 | +6.1% | Paid | Tailors detection specifically for academic institutions and LMS integrations, but is less optimized for casual web users. | [.md](https://openaitools.app/tool/plagiarismcheck-org.md) | | 10 | [StealthGPT](https://openaitools.app/tool/stealthgpt) | 290,918 | +14.2% | Paid | Humanize AI text and check it against AI detectors | [.md](https://openaitools.app/tool/stealthgpt.md) | --- Source: https://openaitools.app/compare/gptzero-me-vs-imageblock More Markdown: [Categories](https://openaitools.app/categories.md) · [Traffic rankings](https://openaitools.app/rankings.md) · [llms.txt](https://openaitools.app/llms.txt)