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

Taskful
Streaky
Gone
Nirow
Streaks
Things
Todoist
A smart to-do list and goal tracker app

Which is more popular?
Website, pricing, platforms and company facts side by side.
|
ZIP
ZIP Code API
|
|
|
|---|---|---|
| Website | zip-codes.com | purpapp.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 Purp 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
Walkthroughs and reviews on video.
No ZIP Code API videos yet. You could help us improve this page by suggesting one.
GRANDDADDY PURPLE STRAIN REVIEW!
More videos
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using ZIP Code API and Purp. For example, how are they different and which one is better?
When comparing ZIP Code API and Purp, 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 Purp:


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

Achieve daily goals and build your personal streak 🔥
Compare Streaky to ZIP Code API or Purp:

The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
Compare PostalDataPI to ZIP Code API or Purp:
