API comparison
Vonage Number Insight alternatives for fraud and KYC teams (2026)
Vonage Number Insight is sunsetting on 4 February 2027. Vonage's own replacement is Identity Insights, a single-call API that bundles carrier data, SIM swap and subscriber match. The main external alternatives for fraud and KYC teams are Telebase, Twilio Lookup and direct carrier integration via GSMA Open Gateway. This page compares each option on the signals that matter for fraud prevention: carrier, number type, active status and SIM swap detection.
Information checked September 2026. Vonage sunset date confirmed at developer.vonage.com. Verify pricing and product status directly with each provider before committing.
Why teams are moving now
Vonage announced that Number Insight will be deprecated after 4 February 2027. The replacement product, Vonage Identity Insights, consolidates carrier data, SIM swap detection and subscriber match into one API. That gives teams roughly five months from the date of this page to migrate.
The sunset is also a natural moment to evaluate whether a Vonage product is still the right fit. Number Insight was designed as a communications-platform add-on. Fraud and KYC teams that adopted it as a convenient carrier lookup may find that a purpose-built phone intelligence API offers better signal coverage, clearer pricing or simpler integration for their specific use case.
What to look for in a Number Insight replacement
The signals most fraud and KYC teams relied on from Number Insight Standard and Advanced are: carrier name, number type (mobile vs VoIP vs landline), country and active status. If you are migrating, you need all four, plus ideally SIM swap detection, which Number Insight never offered as a self-serve product.
Beyond signal coverage, the criteria that differ most between alternatives are: pricing transparency (flat per-query vs country-variable vs opaque), whether SIM swap requires a separate contract or sales conversation, and how much integration work a migration actually takes. For a broader framework, see the decision guide for choosing a phone intelligence API.
The alternatives
Vonage Identity Insights
The official successor to Number Insight. Identity Insights consolidates carrier lookup, SIM swap detection and subscriber match (name, address, date of birth verification against carrier records) into a single API. It sources data from carrier network APIs rather than the legacy HLR lookups that Number Insight Advanced relied on, which should mean fresher active-status data in supported markets.
Vonage publishes a transition guide covering the API differences, and much of the migration is mapping fields rather than rewriting integration logic. Pricing is per-phone-number and pay-as-you-go, though Vonage has not published specific per-query rates for Identity Insights at the time of writing (checked September 2026).
Best for: teams already deep in the Vonage ecosystem (SMS, voice, verify) that want the lowest-friction migration path and need subscriber match alongside carrier data.
Telebase
Carrier, country, number type and active status in a single API call. $0.03 per lookup, flat, the same price regardless of country. SIM swap detection is a separate check at $0.20, requested per call and billed only when you ask for it. SIM swap detection is launching, with early access open now and carrier registration completing in the target markets. Every account starts with 100 free queries. Paid credits are arranged by invoice, with no annual commitment.
The migration from Number Insight is straightforward: one endpoint, one authentication header, one JSON response containing every signal. There are no tiers to configure. For a signal-by-signal comparison with Vonage, see the full Telebase vs Vonage Number Insight comparison.
Best for: fraud and KYC teams that want all signals in one call at a predictable price, without running their own carrier registration for SIM swap access. Built to be called by automated workflows and AI agents as well as human-operated systems.
Twilio Lookup
Twilio Lookup offers carrier and number type via its Line Type Intelligence add-on, and active status via its Line Status add-on. Each is priced separately: Line Type Intelligence starts at $0.008 per lookup, Line Status at $0.007 per lookup (checked July 2026). SIM swap detection is available but requires a sales conversation and is not self-serve.
Twilio's volume-tiered pricing can be cheaper at scale, particularly for teams already using Twilio for SMS or OTP delivery. The trade-off is the add-on model: you configure and pay for each signal type separately, which adds integration overhead for fraud teams that want everything in one response. See the Twilio Lookup alternatives page and the pricing comparison for the full breakdown.
Best for: teams already on Twilio for communications that want to keep vendor consolidation, or high-volume users that benefit from Twilio's tiered pricing.
Direct carrier integration via CAMARA
The GSMA Open Gateway and CAMARA standards define how carriers expose network signals directly, including number verify, device status and SIM swap. Integrating directly gives the freshest possible data with no intermediary.
The trade-off is the same as it was for Number Insight teams that considered going direct before: you need a separate agreement, registration and API connection per carrier, per market. Multi-market coverage means managing multiple integrations. An aggregator handles that carrier layer so you query one endpoint.
Best for: large platforms with dedicated engineering resource that want the absolute freshest data and are prepared to manage per-carrier integrations.
Which signals each alternative covers
Signal coverage summary (September 2026)
- Carrier and number type: Vonage Identity Insights (per-lookup, country-variable pricing), Telebase ($0.03 per lookup, flat), Twilio Lookup Line Type Intelligence ($0.008 per lookup, checked July 2026).
- Active status: Vonage Identity Insights (via network API, market coverage varies), Telebase (included in the $0.03 lookup), Twilio Lookup Line Status (from $0.007 per lookup, checked July 2026).
- SIM swap detection: Vonage Identity Insights (included, market coverage depends on carrier network API availability), Telebase (launching, $0.20 per check, carrier registration handled for you), Twilio (enterprise, contact sales).
- Subscriber match: Vonage Identity Insights only, in this comparison. Telebase and Twilio Lookup do not offer name, address or date-of-birth matching against carrier records.
Migration effort compared
If you are on Number Insight today, the migration path differs by alternative:
Lowest migration friction. Same Vonage account and credentials. The transition guide maps each Number Insight field to its Identity Insights equivalent. Most of the work is updating endpoint URLs, request parameters and response parsing. The API structure has changed (modular insight selection rather than Basic/Standard/Advanced tiers), but the data is familiar.
New provider, but a simpler API surface. One endpoint, one response shape, no tiers. The main integration work is swapping the endpoint and mapping the response fields. The quickstart guide covers authentication and a first call. If you were on Number Insight Standard (carrier and type), the mapping is direct. If you were on Advanced (active status), the active field and its activeSource confidence indicator are included in the standard Telebase response at no extra cost.
New provider with a different API model. Each signal (line type, line status, SIM swap) is a separate add-on that you configure and call independently. Migration from Number Insight Advanced to the equivalent Twilio coverage means setting up two add-ons and parsing two response structures, or making two separate calls.
Vonage Number Insight: what it was and what it lacked
For context, Number Insight was a three-tier product. Basic was free and returned format validation. Standard added carrier name, number type and country. Advanced added active status via HLR lookup, plus roaming data. Vonage's own transition guide notes that the HLR-based active status in Advanced was becoming less reliable due to privacy regulation and technical constraints across the industry.
What Number Insight never offered as a self-serve product was SIM swap detection. For fraud teams, that gap meant relying on Number Insight for carrier data while sourcing SIM swap separately, or going without it. The sunset is an opportunity to consolidate both signals in one provider.