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Instapaper is a simple tool to save web pages for reading later.
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, Instapaper seems to be more popular. It has been mentioned 2 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 | instapaper.com | zip-codes.com |
| 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 Instapaper 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...
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Instapaper Review
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Instapaper 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.

Instapaper is a beloved browser-independent bookmark manager for avid online readers. Create custom libraries to save articles, videos, notes, and more. With a browser extension, you can easily save webpages to your...
Instapaper is available across all major platforms including macOS, iOS and Android for phones, and provides browser extensions for Chrome, Safari and Firefox. Its integration for Kindle is also a little bit more...
With a plain and simple appearance, it entirely fosters enhanced readability for its users. So for distraction-free reading, start off with Instapaper. With this, you can also send articles to e-readers like Kindle!...
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Recommendations tracked on public social media and blogs since March 2021.

Instapaper is a bit simpler to use than pocket. It has a straightforward user interface and it will accept most forms of online content that you throw at it. - Source: dev.to / almost 5 years ago
Here's my workflow: I open the email, scan the list, save the links that look interesting to me in my Instapaper, and delete the email. Later, when I have time to read, I go ahead and read the saved articles in Instapaper. - Source: dev.to / about 5 years ago
Tracking ZIP Code API since May 2026.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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