Tool Comparison

PasteGuard vs AI Privacy Gateway

PasteGuard alternative open source — an in-depth comparison to help you choose the right AI data privacy tool for your stack.

TL;DR: PasteGuard — Browser-based PII redaction for web AI chat interfaces. AI Privacy Gateway takes a different approach: a standalone proxy that masks PII at the network layer, requiring zero code changes and keeping data 100% local.

About PasteGuard

PasteGuard is a browser extension that redacts PII from text before pasting into AI chat interfaces. It works client-side in the browser, focusing on the copy-paste workflow for individual users.

What PasteGuard Does Well

Strengths

  • Simple browser extension installation
  • Works with any web-based AI chat
  • No server infrastructure needed

Limitations

  • Browser-only — no API proxy, no SDK integration
  • No enterprise deployment model
  • Limited to manual paste interactions — cannot protect API calls

Detailed Comparison: PasteGuard vs AI Privacy Gateway

Dimension PasteGuard AI Privacy Gateway
Deployment Browser extension only Docker, binary, browser extension, SDK
API Protection Not supported Full proxy — intercepts all API calls
PII Entities ~8 types 14+ types including Chinese-specific formats
Latency Instant (local JS) <1ms (local Rust engine)
License Proprietary MIT Open Source

Why Teams Choose AI Privacy Gateway Over PasteGuard

1

Zero Code Changes

Unlike PasteGuard's approach, AI Privacy Gateway works as a network proxy. Deploy the Docker container, change the API base URL — done in 30 seconds.

2

Data Never Leaves Your Infrastructure

All PII masking happens locally. Your data is never sent to a third-party cloud for processing. This is critical for GDPR, HIPAA, and PIPL compliance.

3

MIT Open Source

Full source code available. No vendor lock-in, no per-seat pricing, no usage limits. Deploy anywhere, audit everything.

4

14+ Entity Types

Comprehensive PII detection including phone numbers, emails, ID cards, bank cards, names, addresses, API keys, and Chinese-specific formats.

When PasteGuard Might Be the Better Choice

No tool is perfect for every situation. Here is when PasteGuard might make more sense:

However, if you need a self-hosted, open-source, zero-code-change solution that works across all your AI APIs, AI Privacy Gateway is the clear choice.

Try AI Privacy Gateway — Free and Open Source

Deploy in 30 seconds. Compare for yourself.

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Frequently Asked Questions

Is AI Privacy Gateway a replacement for PasteGuard?

It depends on your use case. AI Privacy Gateway is specifically designed for AI API privacy — masking PII before it reaches any LLM provider. If PasteGuard serves a broader or different purpose, they may be complementary rather than direct replacements.

Can I use both PasteGuard and AI Privacy Gateway together?

Yes. Many teams use multiple privacy tools for defense-in-depth. AI Privacy Gateway sits at the network layer, so it works alongside any other tool in your stack.

How does the performance compare?

AI Privacy Gateway adds less than 1ms latency per request (Rust-based detection engine). PasteGuard's performance characteristics depend on its architecture.