Intel · 2026-02-20
The Carrier Signal Landscape in 2026
By PasskeyBridge
The signal sources
Identity threat detection starts with carrier signals. This comparison covers three providers. The choice of provider matters less than what you do with the signal once it arrives.
Vonage (identity insights API + SIM swap API)
- Identity Insights API (generally available since January 20, 2026): number format, original and current carrier, and SIM swap in one request, with location verification, reachability and an advisor insight in developer preview.
- SIM Swap API on the GSMA Open Gateway: returns the timestamp of the most recent SIM change, allowing relying parties to gate sensitive actions.
Twilio Lookup + Verify
- Lookup v2 packages: line-type intelligence, SIM swap, call forwarding and identity match in a single request.
- Verify handles OTP, silent network auth and TOTP fallback alongside Lookup.
- Strong developer experience, mature SDKs and webhook tooling.
Sinch Number Verification + verification
- Deep carrier relationships in European markets and a growing GSMA Open Gateway footprint.
- Data residency options that align with GDPR and EU-only processing requirements.
- Verification API supports SMS, flash-call and number-verification flows.
Provider-agnostic by design
No single provider has complete coverage. A PasskeyBridge lookup asks one provider per request. Ingest stores the event type string you send, and a playbook matches that string.
Beyond detection: the full stack
Carrier signals are Pillar I of the PasskeyBridge platform. But detection alone isn't security, see Why SIM-Swap Detection Is Not Enough. Teams evaluating this as a signal to feed an existing fraud engine typically start with the fraud prevention API overview. The full identity security stack requires:
- Pillar I: ingest the signal, execute the playbook, respond inside the request.
- Pillar II: re-verify the user with verifiable credentials over OpenID4VP, no passwords, no PII.
- Pillar III: bind identity to device biometrics with WebAuthn passkeys, which are phishing-resistant.
The carrier signal starts the chain. PasskeyBridge completes it.
Whether you're using Vonage, Twilio, Sinch or a direct carrier feed, the response logic is identical. The playbook doesn't care where the signal came from, it cares about protecting the user. All of this happens with zero-PII storage and SOC 2 readiness.
Sources
- Vonage developer blog, "Identity Insights API Now Generally Available" (January 20, 2026).
- Vonage developer documentation, SIM Swap API (GSMA Open Gateway).
- Twilio Lookup v2 packages and Twilio Verify documentation.
- Sinch Number Verification API and Verification API product pages.