ScamShield

Local-first browser protection

ScamShield

Screen Smarter. Sell Safer.

ScamShield helps Facebook Marketplace sellers screen potentially suspicious or automated buyer inquiries before responding.

Local-first screening. Clear risk signals. No required cloud AI.

See how it works Read the Privacy Policy

Two clear assessments

What ScamShield does

ScamShield evaluates visible, supported buyer inquiries and presents two distinct views. Scam Risk and Bot Likelihood are separate assessments.

Scam Risk

Looks for potentially suspicious message characteristics and summarizes the result with:

  • Risk level
  • Score
  • Confidence
  • Reasons and signals

Bot Likelihood

Separately evaluates signs that an inquiry may be automated or template-generated, helping you interpret the conversation before you reply.

Possible automation does not, by itself, determine Scam Risk.

Built for informed decisions

Key features

Scam Risk Insights

Identifies potentially suspicious inquiry characteristics and highlights relevant risk indicators.

Bot Likelihood

Highlights signs of possible automation or template-style messaging as a separate assessment.

Live Protection

Can screen supported visible incoming Marketplace messages while you browse—not all Facebook activity.

Local-First Privacy

Default analysis occurs locally. No cloud AI or telemetry is required, and raw buyer-message text is not retained in behavioral history.

Explainable Results

Shows reasons behind an assessment, so you receive context rather than only a score.

A simple review flow

How it works

  1. 1

    Open a conversation

    Open a supported Marketplace buyer conversation in your browser.

  2. 2

    Analyze visible messages

    ScamShield analyzes supported incoming messages currently visible in the conversation.

  3. 3

    Review before responding

    Consider Scam Risk, Bot Likelihood, confidence, and reasons as you decide what to do next.

Privacy by design

Your messages are not a product

ScamShield is local-first. Raw buyer-message text is analyzed in memory, while behavioral history uses bounded fingerprints and timestamps rather than retaining raw buyer messages. Default operation requires no telemetry or cloud AI.

Read the full Privacy Policy

Supported environment

Designed for Chromium browsers

  • Google Chrome
  • Microsoft Edge
  • Supported Facebook Marketplace and Messenger contexts

Supported behavior may depend on changes to Facebook or Messenger interfaces.

Product preview

Screenshots

Approved, privacy-reviewed product screenshots will appear here when available. No product interface has been fabricated.

Product screenshots coming soon