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DLP for browsers, APIs, Slack & AI

Data loss prevention across every egress path

PasteProof is a DLP platform: stop leaks in the browser, automate checks behind APIs and Slack, and govern what reaches LLMs without blocking legitimate work.

Explore solutions

APIs & Slack LLM Gateway & model context Browser extension

Claude Code · Pasteproof Gateway

claude · api.anthropic.com (direct)

Pasteproof Gateway

Off

Demo loops automatically · Same PasteProof detectors as browser & API paths

Get Our Free Security Guide

Download "Leak Prevention Playbook" and learn how to protect your sensitive data

Why Teams Choose PasteProof

Multiple surfaces, one DLP story

Meet employees in the browser, meet builders through APIs and Slack, and extend policies to AI workflows—the same classification mindset everywhere sensitive data might leave.

Browser extension

Catch credit cards, API keys, and personal data at paste time in Chrome and Firefox before forms and SaaS apps receive it.

Why the extension

APIs & Slack

Embed scanning in services and collaboration: REST endpoints for documents and detection plus Slack workflows your security team can trust.

APIs & integrations

LLM gateway & model context

Govern prompts, completions, and tool-style traffic so secrets do not reach models and risky completions do not return unchecked.

AI egress controls

Explore the API docs

You're One Paste Away from a Security Nightmare

Every day, thousands of people accidentally paste sensitive information into the wrong place

jd@unknown.com

2:34 PM

sk-proj-abc123def456...

API key about to be sent over Email

New Issue

Bug in payment form

Card: 4532 1488 0343 1234

Credit card going public on GitHub

ChatGPT

SSN: 123-45-6789

SSN about to be sent to AI

One moment of distraction. One wrong window. One catastrophic data leak.

PasteProof stops this before it happens.

Slack IntegrationBeta

Actively in development — new features shipping regularly

Protect Your Slack Conversations

Every day, teams accidentally share sensitive information in Slack channels—API keys, credentials, customer data, and more. PasteProof monitors your Slack messages in real-time and alerts you before sensitive data is shared.

Real-time message scanning
Detects sensitive data before it's posted
Instant alerts
Get notified immediately when PII is detected
Workspace compliance
Keep your entire team protected with custom policies

View Docs

Free to install • Works with all Slack plans

engineering

42 members

Alice10:23 AM

Here's the test data for staging

Bob10:24 AM

Production API key: sk-proj-abc123...

PII

🔒 PasteProof Alert

Sensitive data detected in #engineering. API key was blocked from being shared.

Protection That Works Everywhere, Automatically

No configuration. No learning curve. Just type normally—PasteProof handles the rest.

Step 1

Install in Seconds

Add PasteProof to Chrome. One click. No account required to start.

Get the extension

PasteProof

★★★★★

Privacy & security

Add to Chrome

Interactive demo — tap the badge to review detections

Message

Here's the API key: sk-proj-abc123 {
  credit_card_number: 4532 1488 0343 1234,
  credit_card_expiration_date: 01/2025,
  credit_card_cvv: 123,
  credit_card_zip: 12345,
  }

Step 2

Type Normally

Work exactly as you always do. PasteProof watches your form inputs in real-time and alerts you before you submit.

Step 3

Get Instant Warnings

About to submit something dangerous? PasteProof detects it immediately with a visible badge and gives you options: anonymize or cancel.

PII Detected

Click the badge to view and anonymize

2 sensitive items found in this field

Try It Yourself

Already installed the extension? Test it out in our interactive playground with sample credit cards, SSNs, emails, and more.

Open Playground

PROFESSIONAL

Context-Aware AI Detection

PasteProof doesn't just look for patterns—it understands context. Our AI distinguishes between:

Legitimate debugging (safe)
Credential sharing (dangerous)
Test data (safe)
Production secrets (dangerous)

Stop false positives. Start protecting what actually matters.

✨ AI detected 2 potential issues

API Key

95% confident

sk-proj-real...

Context: Production key detected in public channel

SSN

88% confident

123-45-6789

Appears to be valid US Social Security Number

Your Data, Your Control

We minimize data retention, anonymize PII before storage, and never sell your data. Learn how we handle your data

Need data residency compliance? We deploy on-premise

Start Protecting Your Data in 60 Seconds

Install PasteProof and never worry about accidental data leaks again.

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No credit card required

Free forever tier

Available for Chrome