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
Rezlynx PMS
Building Engines
Newbook
Entrata
Thesis eProperty
Innago offers a cloud-based property management platform for landlords with small to midsize property portfolios. Innago is 100% free to use and comes with a long list of affordable features.

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 | innago.com |
| Pricing | — | |
| Platforms | — | |
| Company | Startup from the United States · 2026 | 2017 |
| 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...
Innago offers a cloud-based property management platform for landlords of all sizes. With Innago, users can collect rent, manage leases, collect signatures, and manage tenants. Landlords can collect rent via ACH or credit cards. Users can set rents, configure late fees, waive fees if needed, 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
Overall verdict
Why this product is good
Recommended for
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How often each product is chosen within a category, 0–100% relative to the other.

As answered by people managing ZIP Code API and Innago.
Innago's answer:
We’ve built our software from the ground up with small and large, independent landlords in mind. Since the very beginning, we’ve been meeting with property owners for direct feedback on which features matter and which don’t. We’re proud to say that we have a product our landlords and their tenants love. Innago is also free to use for landlords and property owners, yes you read that right! Our entire suite of features, from online rent collection to tenant screening, comes at no cost to landlords. We also know independent landlords and property managers pride themselves on their hands-on approach, and we do too. That’s why every one of our clients gets a personal account representative for themselves and their tenants.
Innago's answer:
Too many property management applications are overwhelming, bloated with unnecessary features that drive up the cost and turn their software “solution” into a software problem. From day one, we've met and collaborated with landlords of all sizes to produce software that is free, effective, and efficient.
Innago's answer:
Property owners and landlords of all sizes.
Share your experience with using ZIP Code API and Innago. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

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I've been using Innago for over a year and have had a great experience. The platform makes it easy for tenants to sign leases digitally through a seamless application process. I also appreciate how everything is...
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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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Next generation cloud based PMS. Rezlynx is PCI compliant, and suitable for any sized hotel or group. It streamlines processes and is seamlessly integrated.
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