Backed by Combinator
Use safely without leaking sensitive data.
LogosGuard redacts your sensitive data before your prompt leaves your device.
Built by researchers and engineers from
Use AI without your private data ending up somewhere you didn't mean.
AI is too useful to avoid
You already use it for everything from drafting emails to debugging code. The question is no longer whether to use AI, it's what you paste into it.
Once it's submitted, it's gone
Your name, address, account numbers, medical details, and personal messages can show up in prompts without you thinking about it. It's impossible to unsend a prompt.
Self-censoring is impractical
Most leaks are accidental. You need an automated layer that catches the things you forgot to redact, before it's sent.
Real data, swapped for placeholders
Sensitive data, like names, addresses, and account numbers, get replaced with placeholders like [NAME] and [ACCOUNT] before your prompt is submitted. The AI sees a working prompt and gives you a working answer. Your real values never leave the device.
Works with all major AI tools
The same redaction layer covers AI tools like ChatGPT and Claude. Whatever you're already using, LogosGuard catches sensitive data before it leaves the browser.
Runs entirely on your device
Detection and redaction happens locally in your browser. No sensitive data leaves the device.
Your data. Your device.
Your control.
Install the extension and use AI tools without worrying about what's in your prompts. No account, no sign-up, no servers.