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Create websites with any design, for any device, for free, including domain.
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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

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 | weld.io | zip-codes.com |
| Pricing | — | |
| Company | — | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of Weld yet.
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...
What each product offers, as listed by its team.

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

Overall verdict
Why this product is good
Recommended for
Weld is recommended for marketers, graphic designers, small business owners, and anyone else who needs to create web content quickly and easily without extensive technical skills. It is especially suitable for small to medium enterprises that require a simple yet effective tool for creating multimedia content.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
WELD ANYTHING - Miller Multimatic 220 Multiprocess Welder Review
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Weld and ZIP Code API. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

Weld is an ETL platform that combines ELT, data transformations, and reverse ETL in one powerful platform. Weld provides a simple, user-friendly interface and is well-suited for smaller data teams that require a...
Create http://s with any design, for any device. It is an online tool for creating interactive web content without coding. Weld add interactivity and animations. Publish on your existing website, a new website, or a...
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Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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Build dynamic, responsive websites in your browser. Launch with a click. Or export your squeaky-clean code to host wherever you'd like. Discover the professional website builder made for designers.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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