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

Alfred
Rectangle
Raycast
GridMove
Preme for Windows
Moom
WinDock
Insanely great window management

Which is more popular?
Based on our record, Swish seems to be more popular. It has been mentioned 5 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 | zip-codes.com | highlyopinionated.co |
| 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 Swish 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
Swish is particularly recommended for professionals, teams, and individuals who value productivity and seamless user experiences. It's ideal for those who are looking for tools to enhance efficiency in tasks and projects.
Walkthroughs and reviews on video.
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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 Swish. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

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You can manage multiple windows on your Mac using various built-in features and third-party tools. For example, you can use Mission Control to view all open windows, Split View to divide the screen into two windows,...
Furthermore, it is the only tool in macOS that aligns and divides windows using a pixel-perfect grid. Swish automatically detects multi-monitor setups (both vertical and horizontal) and lets you swap multiple windows...
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
Swish⁽¹⁾ lets you drag the divider to resize multiple windows at once. BentoBox⁽²⁾ is inspired by Fancy Zones. And Lasso⁽³⁾ is a grid-based window manager with custom layouts. ⁽¹⁾ https://highlyopinionated.co/swish/ ⁽²⁾... - Source: Hacker News / 9 months ago
Pretty cool, but nothing beats Swish if you're using a Macbook trackpad https://highlyopinionated.co/swish/. - Source: Hacker News / about 1 year ago
> That’s the idea behind the new PostHog.com. You can multitask, open a few articles simultaneously, and move them around as you please. No, I can't, because the way I please is to use Swish (https://highlyopinionated.co/swish/) to move... - Source: Hacker News / about 1 year ago
When comparing ZIP Code API and Swish, 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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Alfred is an award-winning app for macOS which boosts your efficiency with hotkeys, keywords, text expansion and more. Search your Mac and the web, and be more productive with custom actions to control your Mac.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Window management app based on Spectacle, written in Swift.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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Fastest way to control Jira, GitHub and other web apps
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