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
Building Engines
Innago
Entrata
Propertyware
Buildium
Rent Manager is a property management software that combines all the features you need to run your business into one integrated into one.

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 | rentmanager.com |
| 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 Rent Manager yet.
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
Overall verdict
Why this product is good
Recommended for
Rent Manager is recommended for property management companies, landlords, and real estate investors who manage a significant number of properties and require a comprehensive solution to handle all aspects of property management in one place. It is particularly beneficial for those looking for customizable and scalable software to meet diverse property management needs.
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Rent Manager: 5 Fast Facts
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When comparing ZIP Code API and Rent Manager, 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.
Compare Yardi Voyager to ZIP Code API or Rent Manager:

The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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Property management software for commercial real estate work orders, preventative maintenance and inspections.
Compare Building Engines to ZIP Code API or Rent Manager: