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

Qwaiting
Qminder
Queue Management System
Jonot
Entry2Exit
Envoy
QLESS
Your Complete All-in-one Web Based Queue Management System Built For Success. Choose queuehub to revamp old queues to Online & Virtual queueing experiences.

Which is more popular?
Website, pricing, platforms and company facts side by side.
|
ZIP
ZIP Code API
|
|
|
|---|---|---|
| Website | zip-codes.com | queuehub.app |
| 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...
QueueHub is a web based queue management system designed to improve customer experience and operational efficiency. It allows businesses to create virtual queues, enabling customers to join a line online or through a mobile app. QueueHub then provides real-time updates on wait times and sends...
What each product offers, as listed by its team.

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
How often each product is chosen within a category, 0–100% relative to the other.

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

Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
Compare Smarty to ZIP Code API or QueueHub App:


Free Zip Code API - Free Postal Code Validation | Zipcodestack
Compare Zipcodestack to ZIP Code API or QueueHub App:

Qminder works the way it sounds: It helps a company mind its queues.
Compare Qminder to ZIP Code API or QueueHub App:

The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
Compare PostalDataPI to ZIP Code API or QueueHub App:
Entry2exit queue management system
Compare Queue Management System to ZIP Code API or QueueHub App: