LogosGuard

LogosGuard is a browser extension that replaces sensitive values such as names, addresses, account numbers, and secrets with placeholders like [NAME] or [ACCOUNT] before a prompt is submitted to AI tools. Detection and redaction run locally in the browser, so the real values do not leave the device, and no account is required. It works with ChatGPT, Claude, Gemini, Copilot, Grok, and Perplexity in Google Chrome or Microsoft Edge.

The extension scans pasted content, text as it is typed, and supported file uploads, detecting eight data types including names, email addresses, phone numbers, addresses, URLs, dates, account and customer IDs, and secrets. It highlights flagged spans, suggests a redacted version, and lets the user accept, edit, or send the original before submission. Settings and state are stored locally, and the detection model is downloaded once and cached on the device. An Enterprise edition adds admin policy, audit logs, SIEM integration, SSO and user provisioning, custom PII rules, and deployment to a VPC or on-premise.

LogosGuard is packaged as a free plan with weekly redaction limits, a Pro plan with unlimited redactions and a 7-day free trial, and a custom Enterprise edition. A desktop app for native clients and IDEs is listed as coming soon.