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

Android
Ubuntu
Windows 10
CentOS
Windows 7
Debian
Fedora
iOS is the operating system associated by default with all Apple mobile devices.

Which is more popular?
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 | apple.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...
No description of iOS yet.
What each product offers, as listed by its team.

Possible disadvantages
An editorial look at what each product does well and who it suits.

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Recommended for
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So, if you want to have a state-of-the-art mobile OS and you do not care about the prices, iOS is for sure the best one for you. Let us now have a look upon some of the pros and cons of iOS-
Not to mention, iOS is much more respectful of your privacy in comparison to Android. Recently, Apple added privacy report to the App Store where it displays all the user data the app is trying to collect. It also...
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Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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Android is an open source mobile operating system initially released by Google in 2008 and has since become of the most widely used operating systems on any platform.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Ubuntu is a Debian Linux-based open source operating system for desktop computers.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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