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SignalWire pricing and alternatives: phone validation API, {e164_number}, Look up phone number, full

SignalWire's sitellms.txtBest phone validation API in 2026
67% complete: 6 of the 9 key fields we checkSee the 9 fields
$13.00per 1,000 phonesHalf of the 237 plans we rank by price cost $5.401 per 1,000 or less. This plan costs less than 18% of the 237 plans.The cheapest plan we rank by price is Twilio, top-up, at $0.00 per 1,000.
Plan: Prepaid balance SignalWire's only plan
Call: GET /api/relay/rest/lookup/phone_number/{e164_number}, Look up phone number, full one of SignalWire's 2 calls
API: Phone validation API SignalWire's only API

About this item

  • Live. The call checks the number when you make it.
  • 6 of the 9 key fields we check. Number, Formats, Validity, Type, Carrier, Place.
  • A balance you top up. You pay $5 or more. You spend all of it on calls. $5 is enough for about 384 calls.
  • One call. You send e164_number to GET /api/relay/rest/lookup/phone_number/{e164_number}. You set include to "carrier,cnam". The call returns whether the number is valid.
  • Who can get it: with conditions. Keep data: no limit. Use data: with conditions.

SignalWire: phone validation API alternatives

We list other providers' plans closest to this plan in price per 1,000 phones. Each plan in the table gives live data.

This planSignalWire, top-up from $5, Prepaid balance, GET /api/relay/rest/lookup/phone_number/{e164_number}, Look up phone number, fullseven.io, top-up, Prepaid balance, GET /api/lookup/hlrVerificarEmails, €10 pack, MNP: 1,000 Phones, GET /phonemnp/validate/singleHLR Lookups, top-up, 1 - 1M, POST /hlr-lookup1Lookup, $7,990 yearly, Professional (annual), POST /hlr-lookup
$ per 1,000$13.00$11.253$11.253$11.253$13.317
Completeness67%78%67%56%67%
Billingpay firstpay firstpay firstpay firstyearly
Pay$5any amount€10any amount$7,990
Enough forabout 384 callsas many as you pay for1,000 callsas many as you pay for50,000 calls a month
Freshnesslivelivelivelivelive
Who can get itanyone with a SignalWire space and a payment method, new accounts stay in Trial mode until at least $5 of credit is addedtraders: the customer assures that he is a trader and that the short messages are sent as part of his businessanyonevolume of 1 - 1M lookups (an individual over 18 or with parental consent, or a business entity)anyone with a business name and a working business email address

Every phone validation API provider we score, ranked

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-25.

  1. info.signalwire.com/hubfs/PDFs/SignalWire-Cloud-Agreement.pdf
  2. signalwire.com/docs/apis/rest/phone-number-lookup/lookup-phone-number
  3. signalwire.com/docs/apis/rest/space/balance/create-top-up
  4. signalwire.com/docs/platform/auto-top-up
  5. signalwire.com/docs/platform/rate-limits
  6. signalwire.com/docs/platform/trial-mode
  7. signalwire.com/legal
  8. signalwire.com/pricing/rates

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

  • Number
  • Formats
  • Validity
  • Type
  • Carrier
  • Porting and roaming, not in the answer
  • Place
  • Risk, not in the answer
  • Owner, not in the answer
Price
$ per 1,000$13.00
Billingpay first
Aggregators
Aggregatorsnone
Charges
Percall
In their words
Their pitchReturns validity and formatting information for any supplied E.164 phone number, with optional carrier and caller-name data.
Data
Freshnesslive
Keep datano limit
Use data"Customer retains ownership of all right, title, and interest in and to the Customer Content", which means content "generated by Customer via use of the SignalWire Services" (Cloud Agreement 4.D), "Customer may not engage in the illegal, harmful, or inappropriate use of the SignalWire Services" (6.B)
Plan
Pay$5
You get$5
Enough forabout 384 calls
Rate limit
Batch1
Speed
Answerin the call
The call
You sende164_number, include "carrier,cnam"
MethodGET
Path/api/relay/rest/lookup/phone_number/{e164_number}
About the plan
PlanPrepaid balance
Who can get itanyone with a SignalWire space and a payment method, new accounts stay in Trial mode until at least $5 of credit is added
The 19 fields the plan's answer can hold

country calling code, national number, possible number, valid number, national format, international format, E.164 format, location, country ISO2 code, time zones, number type, carrier OCN, carrier LATA, carrier city, carrier state, carrier jurisdiction, carrier LEC, line type, caller ID name

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