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

Spotify
Better Lyrics
Pill
YouTube Music
Muzie
Hear It Fresh
MiniTAP
Universal music linking and mini player browser extension

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 | synqapp.io |
| 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 SynQ 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.

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Recommended for
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MIROIR SYNQ M189 HD Projector
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Share your experience with using ZIP Code API and SynQ. For example, how are they different and which one is better?
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Upgrade YouTube Music with Stunning, Synced Lyrics!
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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