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

SoundSource
Volume2
EarTrumpet
Background Music
Volumouse
Audio Sliders
3RVX
App-specific volume control

Which is more popular?
Based on our record, Sound Control seems to be more popular. It has been mentioned 23 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 | staticz.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 Sound Control 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 Sound Control yet.
Walkthroughs and reviews on video.
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LizardSkin Sound Control Test
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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 Sound Control. 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 been more than two months since Mac OS 15 came out, and we still don't have a functional update to be able to use it even though we have paid for the license.
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
Not sure it has those specific features but you may want to check out Sound Control. Source: over 3 years ago
SoundControl is exactly this and more: https://staticz.com/soundcontrol/. Source: over 3 years ago
Hey, bro, I think I've found a solution: I installed the SoundControl software, enabled the "Force Soft Volume Control" option. Yay, the volume is now adjustable! Hope this helps you too! Screenshot. Source: over 3 years ago
When comparing ZIP Code API and Sound Control, 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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The sound control that should be built into MacOS
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Volume2 is an advanced Windows audio mixer, a complete replacement for the standard Volume Control.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
Compare PostalDataPI to ZIP Code API or Sound Control:
