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Collaboration app for UI designers & frontend developers
Smarty
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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

Which is more popular?
Based on our record, Zeplin seems to be more popular. It has been mentioned 23 times since March 2021.
Website, pricing, platforms and company facts side by side.
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ZIP
ZIP Code API
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| Website | zeplin.io | zip-codes.com |
| Pricing | — | |
| Company | Startup from the United States | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of Zeplin yet.
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...
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
Zeplin is best suited for designers and developers working in teams where clear design specifications and organized collaboration are critical. It's particularly beneficial for teams using Figma, Sketch, or Adobe XD who want to ensure precise design implementation and reduce misunderstandings between design and development departments.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Zeplin Basics: Design Systems
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Zeplin and ZIP Code API. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

As aforementioned, Zeplin suffers some inherent drawbacks that may dent designers’ hopes for faster, easy, and reliable UI design. To avert such scenarios, you don’t have to get stuck with Zeplin as there are numerous...
Zeplin is super affordable. It offers 2 plans: Team, which costs $8.00 per user per month, and Establishment, which costs $16.00 monthly. Zeplin also provides a feature-limited Free Plan and Enterprise Plan.
Zeplin is a workspace collaboration tool to document what to build and how designs should behave in a central collaborative place for the entire dev team.
We have no reviews of ZIP Code API yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.

Tools like Zeplin's AI layer, Supernova, and the emerging generation of Figma plugins with AI backends do this today. The output is not a PDF full of screenshots. It is structured data: exact values, token references, and context — the... - Source: dev.to / 8 months ago
Zeplin.io AI-powered design-to-dev handoff. - Source: dev.to / over 1 year ago
Additionally, thank you to all our community launch partners across the frontend ecosystem for helping us bring Storybook 8 to the world! Thanks to Chromatic, Figma, ViteConf, Omlet, DivRiots, story.to.design, StackBlitz, UXpin, Nx, Mock... - Source: dev.to / over 2 years ago
Tracking ZIP Code API since May 2026.
When comparing Zeplin and ZIP Code API, you can also consider the following products.


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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Balsamiq. Rapid, effective and fun wireframing software.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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