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Head-to-head · Phone Number Validation Software

numlookupapi.com vs IPQualityScore Phone Validation API

  • Updated Oct 2026
  • Both researched from official sources
  • 7 checks side by side
Higher score numlookupapi.com #6 in Phone Number Validation Software 8.7/10 Free plan Free plan✓ 3 of 4 features Try numlookupapi.com
IPQualityScore Phone Validation API #9 in Phone Number Validation Software 8.4/10 Free plan Free plan✓ 4 of 4 features Visit IPQualityScore

numlookupapi.com leads on 1 check, IPQualityScore Phone Validation API on 0, and 6 are even. Who comes out ahead on the 7 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scorenumlookupapi.com · 8.7/10
  • Lowest starting pricenumlookupapi.com · $9.99/mo
  • Free planboth
  • Most featuresIPQualityScore Phone Validation API · 4 of 4

numlookupapi.com scores higher on our rubric for phone number validation software: 8.7 against 8.4 out of 10; our editors rank them #6 and #9.

numlookupapi.com is cheaper to start at $9.99/mo against $99/mo.

numlookupapi.com is the better fit for low-cost developers using common SDKs. IPQualityScore Phone Validation API is the better fit for fraud and risk screening teams.

  • numlookupapi.com fits best

    Low-cost developers using common SDKs

  • IPQualityScore Phone Validation API fits best

    Fraud and risk screening teams

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Side by side

Feature numlookupapi.com 8.7/10 Visit ↗ IPQualityScore Phone Validation API 8.4/10 Visit ↗
At a glance
Editor score 8.7 8.4
Ranking #6 in Phone Number Validation Software #9 in Phone Number Validation Software
Best for Low-cost developers using common SDKs Fraud and risk screening teams
Pricing model Free plan + paid Free plan + paid
Starting price $9.99/mo (best) $99/mo
Free plan ✓ ✓
Free trial — —
Deployment Cloud Cloud
Platforms Web Web
Support Email Phone, Docs
Integrations 5 integrations 10 integrations
Built for Solo, Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features numlookupapi.com 3/4 · IPQualityScore Phone Validation API 4/4
Line type data ✓ ✓
Carrier data ✓ ✓
Reachability data ✓ ✓
Bulk validation Not checked yet ✓ (best)
Specs
Validation modes Not checked yet Not checked yet
Monthly lookup limit 5000 lookups/mo 5000 lookups/mo
Our review
Pros
  • Free plan with 100 requests per month
  • Carrier, line-type, country, location, and format data
  • Official JavaScript, Ruby, PHP, and Python SDKs
  • Risk, reputation, disposable-number, and reachability checks
  • Detects mobile, landline, VoIP, toll-free, and virtual lines
  • Supports API lookups, CSV uploads, and broad integrations
Cons
  • Free plan is limited to 100 requests
  • Basic includes only one API key
  • Listed SDK support covers four programming languages
  • Startup pricing begins at $99 per month
  • Listed monthly lookup limit is 5,000
  • Advanced capabilities require higher-tier or Enterprise plans
Our verdict

numlookupapi.com is a JSON REST API for validating and enriching phone numbers. It suits developers and businesses that need to check validity and retrieve phone-number details inside applications. The API returns validity status,…

Read the review →

IPQualityScore Phone Validation API verifies phone numbers through real-time API lookups and bulk CSV validation. It returns validation, activity, carrier, line-type, location, identity, risk, and reputation signals, including checks for…

Read the review →
  1. numlookupapi.comPhone Number Validation Software 8.7Free plan
  2. IPQualityScore Phone Validation APIPhone Number Validation Software 8.4Free plan

Strengths and trade-offs

  • numlookupapi.com — where it wins

    • Free plan with 100 requests per month
    • Carrier, line-type, country, location, and format data
    • Official JavaScript, Ruby, PHP, and Python SDKs

    Where it doesn't

    • Free plan is limited to 100 requests
    • Basic includes only one API key
    • Listed SDK support covers four programming languages

  • IPQualityScore Phone Validation API — where it wins

    • Risk, reputation, disposable-number, and reachability checks
    • Detects mobile, landline, VoIP, toll-free, and virtual lines
    • Supports API lookups, CSV uploads, and broad integrations

    Where it doesn't

    • Startup pricing begins at $99 per month
    • Listed monthly lookup limit is 5,000
    • Advanced capabilities require higher-tier or Enterprise plans

More comparisons

All phone number validation software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update