Polygraf AI

Polygraf AI is an AI-content detector that identifies text written or edited by ChatGPT, Claude, Gemini, and Grammarly with confidence scores — combining AI detection, plagiarism/source identification, and writing analysis in one interface.

What is Polygraf AI?

Polygraf AI is an AI content detector founded March 2023 and headquartered in Austin, Texas, originally built to identify AI-written consumer reviews. It detects text generated or edited by models like ChatGPT, Claude, Gemini, and Grammarly, showing confidence scores from 0–100% with color-coded line-by-line highlighting. It also offers plagiarism/source identification, writing-style analytics, and a content humanizer, delivered through a web interface plus a Chrome extension with Gmail and Google Docs integrations. It has no TrustRadius listing and a weak 2.3/5 AppSumo score across just 10 reviews, dominated by accuracy and upsell complaints. The AppSumo lifetime deal is currently sold out, and free/paid plans start at $9.95/month.

Key Features

• *AI Content Detection** — Confidence scores (0–100%) for AI-generated or AI-edited text
• *Source & Model Identification** — Detect whether ChatGPT, Claude, Gemini, or Grammarly produced the content
• *Line-by-Line Highlighting** — Color-coded breakdown of human, AI-generated, and AI-modified sections
• *Manipulation Detection** — Spot subtle edits like extra spaces that try to trick detectors
• *Plagiarism Detection** — Match content to source URLs and exact sentence-level origins
• *Writing Analysis** — Metrics on readability, vocabulary richness, and sentence structure
• *Content Humanizer** — Rewrite AI text into more natural, human-sounding language
• *Chrome Extension** — Detect content anywhere in Chrome or Edge, plus Gmail and Google Docs integrations
• *Team Statistics** — Review writing quality and consistency across your team
• *API** — Integrate detection into your own workflows (enterprise)

Who is it for?

• Educators and academics who want to check student work for AI-generated content
• Content teams and copywriters verifying that freelance output is original human writing
• Recruiters or employers reviewing applications and submissions
• Journalists and publishers validating content authenticity and sources
• Anyone who wants a quick AI check on web content without paying premium GPTZero prices

Who is it NOT for?

• Anyone who will use detection results as proof — false positives on real human writing are a documented problem here
• Buyers who want the marquee features (copyright detector, highlighter, humanizer) included without paying more
• People with large documents — heavy token consumption and upload bugs hurt
• Non-English content — the tool is built for English text and characters
• Anyone expecting a reliable long-term tool from a company visibly pivoting to enterprise AI security