AI DLP vs. traditional DLP.
Traditional DLP was built for files, email, and network traffic. A prompt typed into a chat window is none of those. Here's exactly what changes, and what your existing tool still covers.
Traditional DLP inspects files, email attachments, and network egress — it has no mechanism for reading a paragraph of free text typed into a browser tab. AI DLP like PromptSec runs in the browser itself, on-device, and catches sensitive data in a prompt before it ever leaves the employee's machine. Most enterprises need both, for different parts of the same problem.
What traditional DLP was built to watch
Email and attachments
Scanning outbound mail for a file that matches a fingerprint or a regex — a spreadsheet with card numbers, a contract marked confidential.
Network egress
Watching traffic at the perimeter for a known pattern leaving the network, usually via a proxy or a gateway with TLS inspection.
Endpoint file events
An agent on the device flagging a copy to USB, a clipboard paste, or a upload through a browser's file picker.
What's different about a prompt
None of the three watch a conversation, because a chat window isn't a file, an email, or a clipboard event.
A prompt has no attachment to fingerprint and no file type to classify. It's typed directly into a third-party web app your organization doesn't operate, so a network proxy sees encrypted traffic to a domain it has to explicitly decide to trust or inspect. An endpoint agent watching for file events has nothing to watch — nobody copied a file anywhere. The sensitive content just gets typed.
That's the gap. It's not that traditional DLP is bad at its job; it's that reading a paragraph of free text for an Aadhaar number, a database password, or a pasted stack trace is a different problem than the ones those tools were built to solve. The full architecture reasoning covers why a proxy, a CASB, or a gateway each miss it in their own way.
Side by side
| Traditional DLP | AI DLP (PromptSec) | |
|---|---|---|
| What it watches | Files, email attachments, and network egress. | Free text typed into an AI chat tool. |
| Where it runs | A network appliance or an endpoint agent. | A browser extension, on-device. |
| Shape it expects | Structured events — a known file type, an outbound message. | Conversational, free-form prose with no fixed schema. |
| Typical blind spot | A prompt typed straight into chatgpt.com from a browser tab. | Native desktop apps and terminals — nothing routes through a browser extension there. |
| What happens on a match | Usually alerts or quarantines the file after the fact. | Redacts, warns, or blocks before the request leaves the browser. |
Do you need both?
Yes — this isn't a replacement for the DLP watching your files and email, it's coverage for the part neither was built for. PromptSec doesn't scan attachments or outbound mail; your existing DLP doesn't read a chat window. Most enterprises we talk to run both, for the same reason a firewall doesn't replace endpoint antivirus.
And detection here isn't exhaustive either — regex and heuristics catch structured identifiers and known attack shapes well, and they still miss things. What's shipped, and what isn't yet is published at the same size as what works.
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