
Stripe
PayPal
PayPal Braintree
Payoneer
Authorize.net
Amazon Pay
Square
One integration allows businesses to accept 250 payment methods, from wherever people pay
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 | adyen.com | zip-codes.com |
| Company | — | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of Adyen 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
Adyen is recommended for large enterprises and businesses with complex payment needs. It is particularly beneficial for those looking to expand internationally due to its extensive geographical coverage and capability to process multiple currencies. E-commerce platforms, retail businesses, and any organization requiring efficient and customizable payment processing solutions may find significant value in Adyen's offerings.
Overall verdict
Why this product is good
Recommended for
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Overview of PayPal, Stripe, and Adyen Payment Technology Companies
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External articles and on-site reviews we used to compare the two products.

Adyen provides a unified commerce platform that combines payments, data, and financial services. Their subscriptions offering is built directly into their global payments infrastructure, designed for large businesses...
Based in Amsterdam, Adyen is an international payment processing company operating in multiple countries so that you can accept money anywhere. It’s a good option for any small business that needs to transfer money in...
Adyen is a popular option for doing business on an international scale. Adyen comes with no set up or monthly fees, and you can choose when and in which currency you want to settle.
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When comparing Adyen and ZIP Code API, you can also consider the following products.

Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes. Use Stripe’s payment platform to accept and process payments online for easy-to-use commerce solutions.
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Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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PayPal is the faster, safer way to pay online without sharing financial details, send and receive money or accept credit and debit cards as a seller
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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An all-in-one solution to accept, process, and split payments in your mobile app or online - from small business to large enterprise.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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