Gptkit

GPTKit is a web-based AI-generated text detection tool for teachers, students, writers, and professionals who need to distinguish human writing from AI-generated content (including ChatGPT-style output).

Key capabilities include:

• Multi-method detection using 6 AI-based techniques to classify submitted text as human or AI-generated
• Authenticity reporting, including an authenticity or reality rate to support review and decision-making
• Developer integration via an API, plus team creation to share credits across members
• Privacy handling, with submitted text removed after processing

Pricing: Freemium, includes 25 free credits for all users, 200 additional credits after free registration, and paid plans. Guest usage includes up to 2048 characters per request.

Notable for its multi-technique approach and stated ~93% accuracy based on testing with 100K+ human and ChatGPT responses, plus an English-only focus and API support for embedding AI-content checks into workflows.