
Adyen
Authorize.net
CardCorp
CoinPayments
CoinPays Payment Gateway
MasterCard Payment Gateway
PaymentVista
Accept credit card payments globally with instant payouts. No KYB, instant approval, built for high-risk merchants. Complete financial freedom.
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?
Website, pricing, platforms and company facts side by side.
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ZIP
ZIP Code API
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|---|---|---|
| Website | rampex.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 Rampex.io 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.

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

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Overall verdict
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Share your experience with using Rampex.io and ZIP Code API. For example, how are they different and which one is better?
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Connect your merchant checkout to global card networks securely with CardCorp's payment gateway, and access major payment methods.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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