Polygraf AI is a cybersecurity company that provides on-premise, zero-trust AI solutions designed to detect deepfakes, prevent data leaks, and ensure regulatory compliance. The company develops Small Language Models (SLMs) that run locally within a customer's own infrastructure, enabling real-time protection in regulated environments without sending data to external services. The company's product portfolio is organized across three areas. Under Data Privacy, Polygraf offers a Secure LLM Chat, a File System Scan tool, and a Secret Marker for document redaction. Under Data Provenance, it provides an AI Detector, AI Highlighter, Humanized Text Detector, Copyright Detector, Plagiarism Detector, Writing Analysis tool, and a Vexon Voice Detector for identifying AI-generated audio. Under Content Generation, it offers a Stealth AI Writer, Content Enhancer, and Content Humanizer. Polygraf AI targets organizations in regulated industries such as defense, finance, healthcare, and government, where data sovereignty and air-gapped deployments are a requirement. The platform is designed to counter threats related to synthetic content, misinformation, and data exfiltration through AI systems. The company has raised a $9.5M seed round led by Allegis Capital and holds AICPA SOC compliance certifications. Its advisory board includes former government and intelligence officials, including a former House Intelligence Committee Chairman and a former CIA Deputy Director, reflecting a focus on national security use cases.