Real-time VoIP fraud detection

Stop scam calls before they connect.

PhoneSentinel analyzes live VoIP audio streams and call metadata to detect robocalls, spoofing, and fraud attempts in milliseconds — with privacy-first controls. Deploy at the edge of your call network, enforce policies instantly, and stream detections to your SOC.

Designed for
SIP trunking Cloud PBX Contact centers Enterprise voice VoIP providers
  • Live risk scoring + instant allow/flag/block
  • Multi-signal detection: voice + behavior + metadata
  • Optional transcripts (toggleable) for NLP-based signals
Live Call Risk
Example decision in real time
Score: 92/100
Caller IDPossible spoofing pattern
BehaviorBurst campaign detected
VoiceRobotic cadence match
ActionFlag + hold policy
Decision HIGH RISK

*Example UI. PhoneSentinel integrates via SIP / API and can stream events to your security tools.

Attack timeline

Campaign view preview (example).

Campaign: Burst spoofing
Clustered
Spike detected
16:02
+120 calls / 2 minutes · short duration pattern
Caller ID inconsistency
16:04
Geo mismatch + repeated CNAM patterns
High-risk decision
16:05
Risk ≥ 90 · spoofing + robocadence
Policy enforced
16:06
Auto hold + block threshold · webhook to SIEM
Reason codes Cluster view Export events
Architecture

Simple pipeline. Fast decisions.

PhoneSentinel ingests call streams + metadata, runs multi-signal AI detection, then returns a risk score and policy action.

1
Ingest
SIP audio stream + call metadata (CID, duration, frequency, geo). Works with live RTP streams or mirrored audio.
2
Analyze
Ensemble scoring: voice signatures, behavioral anomalies, and metadata checks. Optional NLP when transcription is enabled.
3
Act
Return risk score + reason codes. Enforce allow/flag/block or route-to-human verification.
4
Learn
Feedback loop from outcomes (agent tags, customer reports) to improve precision over time.
Operational highlights
  • Low latency scoring suitable for live enforcement
  • Policy engine: thresholds, allowlists, escalation rules
  • Multi-tenant + regional routing support
What you get

A consistent decision interface — whether you block at the SIP layer, flag for agents, or route to verification.

  • Risk score (0–100) + confidence
  • Reason codes (voice / behavior / metadata)
  • Policy action: allow, flag, block
  • Audit logs + event export
Detection Signals

Multi-signal detection beats single-rule blockers.

PhoneSentinel combines voice, behavior, and metadata signals to reduce false positives and catch evolving campaigns.

Voice

Cadence, repetition, acoustic fingerprints, robo patterns.

  • Robotic rhythm + low-variance prosody
  • Known spam voice signatures
Behavior

Burst calling, duration anomalies, campaign clustering.

  • High-volume short-call campaigns
  • Time-of-day + geo anomalies
Metadata

Caller ID spoofing checks, geo mismatch, reputation scoring.

  • Caller identity consistency checks
  • Reputation + historical pattern signals
Optional NLP (transcripts)

Enable transcription only where policy allows. Use NLP to detect social-engineering cues (urgency, threats, financial requests) and classify likely scam intents.

  • Urgency / coercion language detection
  • Financial request + credential harvesting patterns
Configurable: ON / OFF
Real-Time Protection

Integrate once. Enforce everywhere.

Deploy PhoneSentinel at the edge, in your VoIP platform, or alongside your call infrastructure. Stream detections to your SOC workflows — and enforce policies at the SIP layer or inside agent tooling.

Common targets
Robocalls Spoofing Vishing Agent manipulation Fraud campaigns
  • REST API + Webhooks
  • SIP-aware policies (flag, hold, block)
  • Export to SIEM / ticketing
API SIP Webhooks Dashboard
Integration strip
SIP / RTP REST Webhooks SIEM

A simple event payload you can consume anywhere.

{
  "call_id": "c_8f12...",
  "risk_score": 92,
  "confidence": 0.94,
  "action": "flag_hold",
  "signals": ["spoofing", "burst_campaign", "robocadence"],
  "ts": "2026-01-19T16:00:00Z"
}
Dashboard preview

Example of how detections appear in the PhoneSentinel console.

Live Calls
Realtime
Call ID
Risk
Signal
Action
c_8f12…
92
Spoofing
Hold
c_91ab…
67
Behavior
Flag
c_77de…
18
Allow

Static preview — actual UI integrates with your policies and workflows.

Pricing

Usage-based or enterprise licensing.

Start with per-minute analysis, then scale to dedicated models and SLAs as volume grows. All plans include real-time scoring, reason codes, and exportable events.

Starter
Per-minute
For early pilots and small VoIP networks.
  • Real-time scoring
  • API + webhooks
  • Basic dashboards
Growth
Most popular
Volume
For providers scaling traffic and enforcement.
  • Advanced policies (allow/flag/block)
  • Campaign clustering
  • Priority support
Enterprise
License
For regulated teams and telecom-grade SLAs.
  • Dedicated models + tuning
  • Private cloud / on-prem
  • SLA + audit-grade logging
Trust & Privacy

Built for security teams.

Privacy-first by design. Transcription is optional. Data handling is policy-driven and auditable.

  • Configurable transcription (on/off)
  • Encrypted transport + storage
  • Audit logs + exportable events
  • GDPR-aligned retention controls
Request a demo

Tell us what you’re protecting (VoIP, call center, or enterprise). We’ll reply with a rollout plan.

This form is a UI placeholder. Wire it to your backend / email service.
Quick FAQs
Is transcription required?
No — it’s optional and controlled by policy. Voice + behavior + metadata can run without transcripts.
Can we block calls automatically?
Yes — use thresholds to allow/flag/block or route to verification based on confidence.