
Lightspeed
Toast
Heartland Retail
ITSCircle POS
Vantiv
QuickBooksPOS
StoreHub
Square helps millions of sellers run their business-from secure credit card processing to point of sale solutions. Get paid faster with Square. Sign up today!
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, Square seems to be more popular. It has been mentioned 41 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 | squareup.com | zip-codes.com |
| Company | Startup from the United States | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of Square 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
Square is recommended for small to medium-sized businesses, especially in the retail, food and beverage, and service industries, who need a versatile and scalable payment processing and business management solution. It is particularly beneficial for those who prefer a cloud-based service with seamless integration across multiple devices.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Square vs PayPal 2020: A Side by Side Comparison
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Square 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.

If your business needs to process payments in person, Square has handy point-of-sale features like a contactless chip reader, magstripe reader, and convertible stand. All these components let you take payments...
If your business mainly processes card payments in-person in a retail setting, needs a few basic business tools like inventory tracking and sales reports, and is looking for something that seamlessly integrates with...
Square is another big name in retail payments and for a good reason. The easy-to-use platform lets you accept payments online or in-store. There are also useful available features such as invoices, contactless...
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Recommendations tracked on public social media and blogs since March 2021.

This is an advertisement and I want to provide all the details.. I am a software developer and avid traveler. I own this website and am the sole developer who wrote the entire software! This idea came about when I signed up for Global... Source: over 3 years ago
And now with Square it's dirt simple to accept credit card transactions, and the software even integrates into the NFC transceiver in modern iPhones--so even street vendors and local artists accept contactless payment cards. Source: almost 4 years ago
Https://squareup.com/us/en - Better with aged account and/or verified business. Do custom amount charges on phone and type in card info manually. Source: almost 4 years ago
Tracking ZIP Code API since May 2026.
When comparing Square and ZIP Code API, you can also consider the following products.

Retail point-of-sale, inventory management, and omnichannel payment processing systems.
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Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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Built to make restaurants better. Toast gives your restaurant the technology you need to succeed in today's fast-paced environment.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Heartland Retail (previously Springboard Retail) POS software a robust, user-friendly cloud point of sale solution designed for the business of retail. A complete retail management platform built for growing single, multi and franchise brands.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
Compare PostalDataPI to Square or ZIP Code API: