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

productboard
Aha!
ProdPad
Roadmunk
airfocus
Roadmap
Canny.io
Cloud-based product roadmap software solution

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 | productplan.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...
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ProductPlan Roadmap Software: Features Overview
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ProductPlan is a simple but powerful product roadmap software that lets you organize your ideas, create visual roadmaps, and share them with your team. You can use it for free for up to 5 users or pay $49 per month...
When comparing ZIP Code API and ProductPlan, 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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Beautiful and powerful product management.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Aha! is the new way to create visual product roadmaps. Web-based product management tools and roadmapping software for agile product managers.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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ProdPad helps your team gather ideas, surface the best ones and turn them into product specs, and then put it all on a product roadmap.
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