Whitepages

Whitepages Pro provides businesses with global identity verification solutions via enterprise-scale APIs and web tools.

ClickToAddress

ClickToAddress offers APIs for address lookup and verification.

Experian Address Verification API

Experian provides Address Verification API for accurate, complete USPS addresses with minimal data entry.

Intelius

Intelius is a standout amongst the most surely understood online pursuits to use in discovering everything there is to think about a man.

Lob Address Verification API

Lob’s address verification API enables companies to validate and standardize mailing addresses to ensure the mail reaches their customers.

Melissa Data Quality

Melissa helps companies to harness Big Data, legacy data, and people data (names, addresses, phone numbers, and emails).

streetlayer

Free, international and secure address validation, autocomplete and geocode JSON API for developers and businesses - compatible with PHP, Python, and more.