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
Dovetail
YesInsights
FeedBear
Survicate
Owlie
PingPong UX
Customer Feedback Portal
Real-time user research on mobile and desktop ๐ต โ๏ธ

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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LL
Lookback Live
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|---|---|---|
| Website | zip-codes.com | lookback.io |
| Company | Startup from the United States ยท 2026 | โ |
| 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 โ no separate APIs by country or data type. What it does Address validation and standardization โ production-grade parser with ZIP+4 append, refreshed monthly Radius search โ centroid haversine and...
No description of Lookback Live 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
No analysis of Lookback Live yet.
How often each product is chosen within a category, 0โ100% relative to the other.
Share your experience with using ZIP Code API and Lookback Live. For example, how are they different and which one is better?
When comparing ZIP Code API and Lookback Live, you can also consider the following products.

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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Get Customer feedback with simple one-click or NPS surveys
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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The smartest way to manage feedback from your customers
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