
Sound Control
EarTrumpet
Volume2
eqMac
KMix
Audio Sliders
Rectangle
The sound control that should be built into MacOS
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

Which is more popular?
Based on our record, SoundSource seems to be more popular. It has been mentioned 127 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 | rogueamoeba.com | zip-codes.com |
| Company | — | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of SoundSource 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...
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
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Walkthroughs and reviews on video.
Using Rogue Amoeba's SoundSource to Control Audio on Your Mac - SoundSource 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 SoundSource and ZIP Code API. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Per-app mixing on the first-level menu. I like SoundSource on macOS for the same reason: https://rogueamoeba.com/soundsource/. - Source: Hacker News / 8 months ago
Do I need this if I already use something like SoundSource[1] to manually set the input source that's not the AirPods microphone? [1] https://rogueamoeba.com/soundsource/. - Source: Hacker News / about 2 years ago
This is hilariously biased. This is HN, you're not talking to people who don't know what Linux is. Hell, a huge portion of us are linux engineers of various sorts. You're also in a thread literally about a linux app. Anyway. I would... - Source: Hacker News / about 3 years ago
Tracking ZIP Code API since May 2026.
When comparing SoundSource and ZIP Code API, 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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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.
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