NordVPN Launches AI Voice Detector

Cybersecurity company NordVPN is adding an AI Voice Detector to its Chrome browser extension that can identify artificial intelligence-generated voices in real time while browsing the web. The feature analyzes audio playing in any active browser tab to determine whether the voice is human or AI-generated.

AI Voice Detector's underlying model was trained on thousands of real and AI-generated audio samples and uses a custom neural network to distinguish between human and synthetic voices. The result appears both inside the extension popup and as a small, unobtrusive notification on the webpage itself, color-coded for clarity: green for human speech, red for an AI-generated voice, and amber for potentially AI-generated audio. All of the analysis happens entirely on the user's device. When the user stops detection or closes the tab, all audio buffers are immediately discarded.

AI Voice Detector analyzes acoustic characteristics only and does not understand, record, or interpret the content of any conversation. No user identity, browsing history, cookies, or account information is accessed at any point.

"AI-generated voices have become one of the most convincing tools in a scammer's arsenal, and most people have no reliable way to tell the difference," said Domininkas Virbickas, product director at NordVPN, in a statement. "We built an AI Voice Detector to close that gap, delivering a real-time checker that runs entirely on your device, so you can trust what you're hearing without sacrificing your privacy."