
Innago
AppFolio
Yardi Voyager
Newbook
Building Engines
Thesis eProperty
Gnomen
Next generation cloud based PMS. Rezlynx is PCI compliant, and suitable for any sized hotel or group. It streamlines processes and is seamlessly integrated.
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

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 | guestline.com | zip-codes.com |
| Company | — | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of Rezlynx PMS yet.
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...
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
Rezlynx PMS is best suited for small to medium-sized hotels, boutique properties, and independent accommodations looking for a comprehensive, scalable, cloud-based management solution. It is also beneficial for properties seeking efficient channel management and integrations with other guest service systems.
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Rezlynx PMS and ZIP Code API. For example, how are they different and which one is better?
When comparing Rezlynx PMS and ZIP Code API, you can also consider the following products.

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.
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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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