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

Synapse
DockbarX
Keypirinha
Listary
Gnome-Pie
Ulauncher
Cairo-Dock
Simple, sleek, swift, smart. Do. GNOME Do allows you to quickly search for many items present on your desktop or the web, and perform useful actions on those items. GNOME Do is inspired by Quicksilver & GNOME Launch Box.
Which is more popular?
Website, pricing, platforms and company facts side by side.
|
ZIP
ZIP Code API
|
|
|
|---|---|---|
| Website | zip-codes.com | launchpad.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 Gnome Do 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
Gnome Do is recommended for Linux users who enjoy customizing their workflow, prefer keyboard-driven interfaces, and are looking for a powerful and flexible application launcher to boost their productivity. It is particularly suited for developers, IT professionals, and power users who frequently work with multiple applications and need to streamline their desktop interactions.
Walkthroughs and reviews on video.
No ZIP Code API videos yet. You could help us improve this page by suggesting one.
Gnome Do Review with Docky feature
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using ZIP Code API and Gnome Do. For example, how are they different and which one is better?
When comparing ZIP Code API and Gnome Do, you can also consider the following products.

Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
Compare Smarty to ZIP Code API or Gnome Do:

Synapse is a semantic launcher written in Vala that you can use to start applications as well as find and access relevant documents and files by making use of the Zeitgeist engine.
Compare Synapse to ZIP Code API or Gnome Do:

Free Zip Code API - Free Postal Code Validation | Zipcodestack
Compare Zipcodestack to ZIP Code API or Gnome Do:

DockbarX is a standalone dock that groups and launches applications.
Compare DockbarX to ZIP Code API or Gnome Do:

The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
Compare PostalDataPI to ZIP Code API or Gnome Do:

A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
Compare Keypirinha to ZIP Code API or Gnome Do: