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Sheety
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USZipLookup
Simple API Generator
PublicAPIs
Sheetsu
Access to worldwide postal code data

Exam.net
StudySpaces is a white-label tutoring and test prep platform with built-in SAT, ACT, etc. curriculum, auto-graded mock exams, and a branded student portal.

Which is more popular?
Based on our record, PostalCodes.app seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | postalcodes.app | studyspaces.com |
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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 StudySpaces yet.
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using PostalCodes.app and StudySpaces. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Hey r/API, I made PostalCodes.app, which is an API to access worldwide postal code and zip code range data, I tried to make it simple, and also made simple documentation, would like to hear your thoughts. Source: over 5 years ago
Tracking StudySpaces since Nov 2026.
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