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

X (Twitter)
Reddit
ClubsAll
Mastodon
Facebook
Tumblr
Share My Stack
Say more with Threads — Instagram's new text app.

Which is more popular?
Based on our record, Threads App seems to be more popular. It has been mentioned 11 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 | threads.com |
| 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 Threads App 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 Threads App yet.
Walkthroughs and reviews on video.
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THREADS APP TUTORIAL | How to use Instagram Threads & what you need to know about this first version
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using ZIP Code API and Threads App. 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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It’s a platform that allows text updates enriched with links, photos, and videos to weave together a vivid social narrative. Unlike Twitter, Threads extends its character limit to 500, allowing for a more nuanced...
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
Twitter is not blocking actual threads.net URLs; instead, the platform is blocking (or at least disrupting) searches for tweets and profiles that include threads.net URLs. Source: over 3 years ago
That is a MAJOR drawback. Maybe it will come with time. But the domain is threads.net. threads.com belongs to a completely different app. That is going to be a head-scratcher for sure. Source: over 3 years ago
It's pretty stupid to me. I goto threads.net and all I see is a qr code. Not everyone has a smart phone. So it's useless to me if I cannot use it on a browse. Source: over 3 years ago
When comparing ZIP Code API and Threads App, 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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Connect with your friends and other fascinating people. Get in-the-moment updates on the things that interest you. And watch events unfold, in real time, from every angle.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Reddit gives you the best of the internet in one place. Get a constantly updating feed of breaking news, fun stories, pics, memes, and videos just for you.
Compare Reddit to ZIP Code API or Threads App:

The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
Compare PostalDataPI to ZIP Code API or Threads App: