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

Quandoo
SevenRooms
OpenTable Connect
Reserve
Yelp Reservations
ResyOS
NoWait
An Electronic Reservation Book for restaurants.
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 | simpleerb.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 simpleERB 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
SimpleERB is recommended for small to medium-sized restaurants looking to improve their reservation management without incurring high costs. It's particularly suitable for establishments that prioritize ease of use and efficient table management over advanced marketing and promotional features.
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simpleERB - How to set up and monitor customer feedback
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When comparing ZIP Code API and simpleERB, 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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Since launching in December 2012, Quandoo has expanded into 12 countries and has seated more than 150 million diners in 18,000+ restaurants.
Compare Quandoo to ZIP Code API or simpleERB:

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

A reservation, seating and guest management solution for hospitality operators to acquire, engage...
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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