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

Which is more popular?
Based on our record, Gate.io seems to be more popular. It has been mentioned 2729 times 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 | gate.io |
| Pricing | — | |
| Company | Startup from the United States · 2026 | Startup from the United States · 100 - 249 employees · 2013 |
| 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 Gate.io 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.

Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
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Gate.io Review: Is Gate.io Safe? (My Experiences After 3+ YEARS!)
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Not all coins were found, but the experience was positive from using it.
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
A mate of mine transferred usdc from binance into gate.io and its coming up as usdc5 (delisted) and can trade it at all? Source: almost 3 years ago
Godamn no wonder, gate.io moons price more than mexc haha. Source: almost 3 years ago
So I've never had any issues before withdrawing or depositing to gateio. But for some reason unknown to me my last two withdrawals are stuck at "verifying". I've opened a ticket 24 hours ago and no response. Would love just a reply to... Source: almost 3 years ago
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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