
Skiplino
Qminder
QLESS
Wavetec QMS
Earlyone
DropReady
9techies
Queue-it empowers organizations to deliver seamless user experiences and protect their brand reputation by controlling online traffic.
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?
Based on our record, Queue-it seems to be more popular. It has been mentioned 15 times 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 | queue-it.com | zip-codes.com |
| Pricing | — | |
| Company | — | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

Queue-it helps in high-demand and limited-supply situations—like sneaker releases, ticket on-sales, or government registrations—that can easily overwhelm a website or app. In these high-demand situations, online visitors are redirected to a customizable waiting room and then throttled back to the...
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.

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

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Recommendations tracked on public social media and blogs since March 2021.

There's a whole business for bad performing websites that need to limit visitors! https://queue-it.com/. - Source: Hacker News / over 2 years ago
Hello, I've been frequently archivng the Bungie Store as part of a wiki project for a few years now, but recently the website began acting strangle. The store has a queue system which it usually only deploys once a year (using the... Source: about 3 years ago
They're using https://queue-it.com/ . Source: over 3 years ago
Tracking ZIP Code API since May 2026.
When comparing Queue-it and ZIP Code API, you can also consider the following products.

Queue management system software for queuing customers and gather their feedbacks, monitor real-time information and speed of services.
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Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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Qminder works the way it sounds: It helps a company mind its queues.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
Compare PostalDataPI to Queue-it or ZIP Code API: