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

MyNoise
Noisli
Brain.fm
Noiz.io
Rainy Mood
Blanket
Moszen
Ambient sounds to wash away distraction.

Which is more popular?
Based on our record, A Soft Murmur seems to be more popular. It has been mentioned 93 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 | asoftmurmur.com |
| Company | Startup from the United States · 2026 | Startup from Australia |
| 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 A Soft Murmur 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
Walkthroughs and reviews on video.
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A Soft Murmur REVIEW | Mobile Apps
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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 A Soft Murmur. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
I haven't heard of that one, will look into it. I used to use https://asoftmurmur.com/ for a long while. I prefer the separate device I have now instead of an app. - Source: Hacker News / over 1 year ago
I believe this is adjacent, but I quite like https://asoftmurmur.com/. I’m not sure if it’s able to run offline. - Source: Hacker News / almost 3 years ago
This isn't music per say, but do you know about A Soft Murmur? Source: almost 3 years ago
When comparing ZIP Code API and A Soft Murmur, 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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Custom shaped online noise machines. Many Many generic sounds
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Noisli is a fantastic background noise and color generator for working and relaxing. Online soothing ambient sounds like White noise, Rain and Coffee Shop.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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Music designed for the brain to enhance focus, relaxation, meditation, naps and sleep within 10 - 15 minutes of use.
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