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

Microsoft Azure Active Directory
WSO2 Identity Server
oneall
Ping Identity Platform
Sign&go Global SSO
ForgeRock Identity Platform
Okta Single Sign-On
OpenIDM is an all-in-one open identity management system that provides all the functionality required to meet any level of complexity required by a large website with complex roles and groups structure.

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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 | forgerock.github.io |
| 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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What each product offers, as listed by its team.

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When comparing ZIP Code API and OpenIDM, 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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Azure Active Directory is a comprehensive identity and access management cloud solution that provides a robust set of capabilities to manage users and groups and help secure access to applications including Microsoft online services like Office 365 …
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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WSO2 Identity Server efficiently undertakes the complex task of identity management across enterprise applications, services and APIs.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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OneAll Social Login is used by more than 250,000 websites worldwide, including small blogs, growing startups and large corporate enterprises.
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