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

DaisyDisk
WinDirStat
CleanMyMac X
WizTree
Disk Inventory X
TreeSize
Baobab Disk Usage Analyzer
GrandPerspective is a small utility application for Mac that graphically shows the disk usage...

Which is more popular?
Based on our record, GrandPerspective seems to be more popular. It has been mentioned 122 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 | zip-codes.com | grandperspectiv.sourceforge.net |
| Pricing | — | |
| 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 GrandPerspective yet.
What each product offers, as listed by its team.

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An editorial look at what each product does well and who it suits.

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Why this product is good
Recommended for
No analysis of GrandPerspective yet.
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If you've been on Mac for 10+ years, you probably know GrandPerspective. It was the original treemap visualizer, and it's completely free under GPL.
The main drawback of this tool is that it presents a lot of information which can be quite overwhelming to the user. It will not display an overview of your disks which contradicts its name. In summary,...
GrandPerspective’s menu/toolbar contains all of the options the app offers. You can configure its settings easily even if you are a newbie Mac user. You just need to choose a folder you want to analyze. The app will...
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
Don't pay $10 for what you can get for free: https://github.com/RobinNaumann/disko, https://grandperspectiv.sourceforge.net/, https://www.derlien.com/, etc… Otherwise, this is good advice. My cousin, who isn't particularly computer... - Source: Hacker News / 6 months ago
I simply run GrandPerspective (GUI app, https://grandperspectiv.sourceforge.net/), or dust (terminal app, https://github.com/bootandy/dust), to give me an idea of what is going on with disk usage. - Source: Hacker News / 8 months ago
I’d recommend GrandPerspective:[1] it’s really good at displaying this sort of thing, has been around for over two decades, and the developer has managed to keep it to <5MB which is perfect when you’re running very low on space. [1]... - Source: Hacker News / 8 months ago
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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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