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PolicyDiff: Automated GDPR &
Terms of Service Monitoring

The deterministic API for legal policy change detection. Track intent shifts in Privacy Policies and TOS through rule-based proximity clustering. 100% auditable compliance.

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json_output_trace

{
  "message": "Changes detected",
  "risk_level": "HIGH",
  "changes": [
    {
      "section": "2. subscription tiers",
      "type": "MODIFIED",
      "details": [
        { "value": "...", "added": false },
        { "value": "refund removed", "added": true }
      ],
      "risk": "HIGH",
      "reason": "keyword root match"
    }
  ],
  "isolation_drift": true,
  "numeric_override_triggered": false
  "fuzzy_match_count": 0,
  "low_confidence_fuzzy_match_count": 0,
  "fuzzy_collision_count": 0,
  "title_rename_count": 0
}

Policies Change Silently.
Track Intent Shifts.

Web documents are updated frequently. Small wording changes can shift legal meaning. PolicyDiff identifies these shifts using a rule-based engine instead of keyword lists.

Proximity clustering for intent matching

Negation tracking (not/never removed)

Structural monitoring for clause deletion

Rule Engine

Intent-based verb scanning.

Structural

Flags clause deletions.

Negation

Tracks logical shifts.

Context

Section-aware weighting.

pipeline_orchestrator

✔ [SIGNAL] Proximity Cluster: "sell" + "data"

✔ [SIGNAL] Negation Shift: "not" removed

// Section Multiplier applied

→ RISK: HIGH

✔ [DB] Snapshot stored

Rule-Based System

Technical Logic

The engine identifies intent through proximity clustering and negation-shift analysis. It does not use probabilistic models.

Proximity windows for verb+noun matching

Negation word tracking (not/never)

Automatic drift detection

Memory-to-DB sync guards

Get Your Free
API Key

Start monitoring structural changes today. Our free tier includes 30 jobs per month and full access to our deterministic engine logic.

No credit card required

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Access to technical documentation

Regeneration Process:1. Enter email to receive a magic link.
2. Click link and verify security check.
3. New key is generated and emailed instantly.

Common Questions

PolicyDiff is a rule-based utility that monitors structural and legal changes in web documents like privacy policies and terms of service.

No. PolicyDiff is strictly rule-based. We use deterministic algorithms to ensure results are 100% auditable and free from AI hallucinations.

To protect your API key. Client-side calls would expose your credentials. All requests must be proxied through your own server.

The engine scans for the addition or removal of words like 'not' or 'never' within sensitive clauses to detect intent shifts.

It signals a significant layout change on the monitored site that might affect the accuracy of the isolated policy content.

View all frequently asked questions

PolicyDiff: Automated GDPR & Terms of Service Monitoring

Policies Change Silently. Track Intent Shifts.