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

AppFolio
Yardi Voyager
Rent Manager
Building Engines
TenantCloud
ResMan
Entrata
Buildium's software helps property management companies become more efficient and profitable. Start your free trial today, no credit card required!

Which is more popular?
Based on our record, Buildium seems to be more popular. It has been mentioned 1 time 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 | zip-codes.com | buildium.com |
| Pricing | — | |
| Company | Startup from the United States · 2026 | — |
| 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...
No description of Buildium yet.
What each product offers, as listed by its team.

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

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Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
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Share your experience with using ZIP Code API and Buildium. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
It buildium.com for community associations. Source: over 4 years ago
When comparing ZIP Code API and Buildium, 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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AppFolio is the premier online property management software for modern residential and rental property managers. Try it free today.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Voyager is software for managing properties and the people who live there. The software is developed by Yardi, a company founded in 1984 that specializes in property management software. Read more about Yardi Voyager.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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Rent Manager is a property management software that combines all the features you need to run your business into one integrated into one.
Compare Rent Manager to ZIP Code API or Buildium: