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

SmartMedia Pro
CSE Classroom Manager
LearnZillion
VSware.ie
CourseCruiser
Ab Tutor
NetSupport School
DyKnow Cloud shows teachers how students use their time and helps teachers keep devices useful for learning.

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 | dyknow.com |
| Pricing | — | |
| 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 DyKnow Cloud yet.
What each product offers, as listed by its team.

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An editorial look at what each product does well and who it suits.

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

Share your experience with using ZIP Code API and DyKnow Cloud. For example, how are they different and which one is better?
When comparing ZIP Code API and DyKnow Cloud, 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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Smartmedia Pro Classroom Management Software allows remote-control of classrooms and virtual classroom management.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Technology for Education
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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LearnZillion champions teachers and provides schools and districts with an effective bridge to the common core.
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