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

Volume2
Sound Control
SoundSource
Volumouse
Audio Sliders
Background Music
3RVX
Volume Control for Windows
Which is more popular?
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 | github.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 EarTrumpet 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
EarTrumpet is recommended for Windows users who want more control over their audio settings, particularly those who often work with multiple audio applications, need to switch between different audio output devices quickly, or desire a more intuitive audio management interface than the default Windows tool.
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How to Change Individual App Volume in Windows 10 - EarTrumpet App Review
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EarTrumpet is free to use for an advanced volume control app for Windows. This tool supports moving apps between various playback devices. It also offers both classic and modern app volumes.
When comparing ZIP Code API and EarTrumpet, 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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Volume2 is an advanced Windows audio mixer, a complete replacement for the standard Volume Control.
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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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The sound control that should be built into MacOS
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