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

Asana
Teamgantt
Basecamp
Wrike
Teamwork
Smartsheet
Redmine
Quickbase provides a no-code operational agility platform that enables organizations to improve operations through real time insights and automation across complex processes and disparate systems.
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 | quickbase.com |
| Pricing | — | |
| Company | Startup from the United States · 2026 | Startup from the United States |
| 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...
Quickbase provides a no-code operational agility platform that enables organizations to improve operations through real-time insights and automation across complex processes and disparate systems. Our goal is to help companies achieve operational agility—to be more responsive to customers, more...
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QuickBase is one of the friendly and highly useful JIRA alternatives which can be used instead of JIRA. The platform is highly flexible, and it can adapt to any work environment. This tool can be a good comparison as...
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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.
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A simple and elegant project management system.
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