Listed alphabetically. A tool is ranked by its reviews once it has 3.
AI detection tools with a public API Tool Reviews Lowest paid plan Free plan Free trial Public API Runs on Main features GPTZero An AI detector that detects AI content and checks writing quality. Reviews None yet Write one for GPTZero Lowest paid plan A$17.99 per month, billed annually Premium, as of November 14, 2026 Free plan YesFree trial Not confirmed Public API YesRuns on Chrome, Google Docs Main features AI detection Writing replay Plagiarism checker Originality.ai An AI detector that identifies whether text was generated by platforms like ChatGPT, Gemini and Claude. Reviews None yet Write one for Originality.ai Lowest paid plan $12.95 per month, billed yearly Pro, as of November 14, 2026 Free plan YesFree trial Not confirmed Public API YesPangram An AI checker for ChatGPT, Claude and Gemini text. Reviews None yet Write one for Pangram Lowest paid plan $20 per month Individual, as of November 14, 2026 Free plan YesFree trial 7 daysPublic API YesReality Defender Detect deepfakes in audio, video, and images, and identify AI callers. Reviews None yet Write one for Reality Defender Lowest paid plan $399 Business, as of November 14, 2026 Free plan YesFree trial Not confirmed Public API YesSapling Free AI detector that checks if text is AI-generated. Reviews None yet Write one for Sapling Lowest paid plan $25 per month, or $12 per month billed annually Pro, as of November 14, 2026 Free plan YesFree trial 1 monthPublic API YesZeroGPT AI detection, plagiarism checking, and writing tools. Reviews None yet Write one for ZeroGPT Lowest paid plan See plans Free plan YesFree trial Not confirmed Public API YesRuns on WhatsApp, Telegram
From each tool's own website. “Not confirmed” means we couldn't confirm it there, not that the tool doesn't have it. Each tool's page says when its facts were checked.
How this list is made A tool is listed here only when we've confirmed on its own website that it has a public API. Tools we couldn't confirm it for are left out, even if they may have it. Vendors can't pay for a place on this list. Add a tool we missed