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

Splitwise
Tricount
Settle Up
Splid
ihatemoney
Splitser
Kittysplit
Free and Open Source Alternative to Splitwise. Share expenses with your friends and family.

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 | zip-codes.com | spliit.app |
| Pricing | — | |
| Platforms | — | |
| Company | Startup from the United States · 2026 | 2022 |
| 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...
Use Spliit to track your expenses with your roommates, travel friends, or family. Create expenses faster than ever by scanning the receipt Assign categories to your expenses See optimize reimbursement suggestions to avoid too many transfers Spliit is totally free and without any ads. It is open...
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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Recommended for
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When comparing ZIP Code API and Spliit, you can also consider the following products.

Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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Splitwise is a free tool for friends and roommates to track bills and other shared expenses, so that everyone gets paid back. On the web, iPhone, and Android!
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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.
Compare PostalDataPI to ZIP Code API or Spliit:

SETTLE UP is an indispensable app for friends and flatmates who need to keep track of shared bills...
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