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
DockbarX
Gnome-Pie
Ulauncher
Synapse
Keypirinha
Gnome Do
Wox
Launchy is a cross platform app launcher that also launches documents, folders and web browser bookmarks.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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ZIP Code API
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Launchy
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| Website | zip-codes.com | launchy.net |
| 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 Launchy yet.
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Launchy comes with a set of plugins installed but unlike Wox you don’t get huge plugin support. It also supports file search but you have to specify the directories it has to look for the file. This can be done...
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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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