LogosGuard

People increasingly use AI tools for everything from drafting emails to debugging code, pasting in prompts without thinking about what they contain. Sensitive information like names, addresses, account numbers, and medical details can end up in these prompts accidentally. Once a prompt is submitted, it cannot be unsent, so the data is effectively gone. Manually self-censoring every prompt is impractical, since most leaks happen because people simply forget what they typed.

LogosGuard is a browser extension that detects and redacts sensitive data, such as names, addresses, and account numbers, replacing it with placeholders like [NAME] and [ACCOUNT] before a prompt leaves the device. The AI tool receives a working prompt with placeholders and returns a usable answer, while the real values never leave the user's device. Detection and redaction happen entirely locally in the browser, so no sensitive data is sent to any server. It works across major AI tools including ChatGPT and Claude, and requires no account or sign-up to use. The company also offers a separate enterprise option for organizations wanting to stop sensitive data from reaching AI tools.