SMS Fraud

Stop OTP pumping before it reaches your bill.

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What you get

Stop SMS pumping

Block bot-driven OTP floods at the device

Cut telecom costs

Catch fraudulent verification traffic early

Protect real verifications

Don't slow down genuine sign-ups

Stay ahead of routing fraud

Device signal, not just phone number

How visitor ID decides

OTP numbers can rotate all day. One visitor ID is enough to show the flood is coming from the same abusive device.

OTP flood, one visitor ID

Visitor ID

vis_2f9b6a41c8d0e357

Stable across sessions, networks, and identity changes.

BLOCKDecision

Phone numbers rotate. The visitor ID does not — stop pumping at the device.

OTP request #1

+254 7XX · verify

OTP request #12

Different numbers, same device

OTP request #47

Abusive pattern on this visitor ID

Signals that matter here

Device Continuity
Flags repeated requests from the same abusive device
Risk Score & Reason Codes
Explainable, traceable decisions your team can defend

Global telecom fraud losses reached $41.82 billion in 2025, with SMS pumping alone estimated at $1.2 billion or more annually.

Source: Communications Fraud Control Association (CFCA) Global Fraud Loss Survey, 2025

Example verify response

Example response — illustrative. Field names, types, and shape may differ in production. Confirm the live schema with engineering before treating this as API documentation.

{
  "vis_id": "vis_2f9b6a41c8d0e357",
  "risk_score": 58,
  "action": "block",
  "reason": [
    "device_linked_to_abusive_pattern"
  ],
  "global_risk_score": 52
}