Smarty
Zipcodestack
PostalDataPI
Geoco.io
Melissa Data Quality
Loqate
usZIPCodes.org
REST API for US ZIP, ZIP+4, and Canadian postal codes. Single unified endpoint covers address validation and standardization, radius search (centroid haversine and true spatial polygon intersection), point-to-point distance, autocomplete/typeah

CyberChimps
InkThemes
Themify
Web-Dorado
Graph Paper Press
YOOtheme
Nimbus Themes
WPExplorer enables you to explore numerous WordPress Plugins and Themes and pick the one that matches the requirements of your company.
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Website, pricing, platforms and company facts side by side.
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ZIP
ZIP Code API
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| Website | zip-codes.com | wpexplorer.com |
| Company | Startup from the United States · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.

API for US ZIP, ZIP+4, and Canadian postal code data. One unified endpoint set covers North America — no separate APIs by country or data type. What it does Address validation and standardization — production-grade parser with ZIP+4 append, refreshed monthly Radius search — centroid haversine and...
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When comparing ZIP Code API and WPExplorer, you can also consider the following products.

Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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Get Free & Premium WordPress Themes & Templates - Fully Customizable, Fast & Mobile-Friendly by CyberChimps. Home of the popular Responsive WordPress Theme.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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2500+ Ready-Made WordPress Themes for all businesses, Install & use QUICKLY, No coding required, FREE + PAID + Responsive + Best WordPress Themes, 24*7 Support.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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Premium WordPress Themes & Plugins Since 2010, Themify themes and plugins have been helping 87,941+ customers make beautifully responsive WordPress sites, faster and easier than ever.
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