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

Mozilla Add-ons
Addoncrop
Opera Add-ons
CRX4Chrome
Chrome Web Store
Browser-extensions.club
extensions.af
Plugins Addons Extensions is a platform that provides a one-stop-shop for all the latest Chrome extensions that can help you to run your business.

Which is more popular?
Based on our record, Plugins Addons Extensions seems to be more popular. It has been mentioned 1 time since March 2021.
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 | pluginsaddonsextensions.com |
| Pricing | — | |
| 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 Plugins Addons Extensions yet.
What each product offers, as listed by its team.

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

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No analysis of Plugins Addons Extensions yet.
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using ZIP Code API and Plugins Addons Extensions. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
I found an extension here it is working for me Https://pluginsaddonsextensions.com/. Source: about 3 years ago
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Extends the functionality of your web browser
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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