
Postio.co.uk
Ideal postcodes
Fetchify
Smarty
Data8 UK
ZIP Code API
Data8 UK PredictiveAddress
The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.

WinDirStat
WizTree
Baobab Disk Usage Analyzer
DaisyDisk
CleanMyPC
Avast Cleanup
SpaceSniffer
TreeSize tells you where precious disk space has gone to.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | postaldatapi.com | jam-software.de |
| Pricing | — | |
| Company | Startup from the United States · 1 - 9 employees · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


PostalDataPI is a global postal code validation and enrichment API covering 240+ countries and territories. One API, one key, one flat rate — $0.000028 per query with no tiers or subscriptions. What you get back: Up to 18 metadata fields per postal code — city, state/region, coordinates,...
No description of TreeSize yet.
What each product offers, as listed by its team.


Possible disadvantages
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
TreeSize is recommended for system administrators, IT professionals, and everyday users who need an efficient way to track and manage disk space usage. It is particularly useful for those managing multiple drives or looking to perform detailed storage audits.
Walkthroughs and reviews on video.
PostalDataPI Now Returns 18 Fields Per Postal Code — for 240+ Countries
More videos
How to Easily Free Disk Space with Treesize (or similar)
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using PostalDataPI and TreeSize. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


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TreeSize Professional is a flexible hard disk space managing tool for all Windows and client/server. You can visualize your hard disk space usage.
When comparing PostalDataPI and TreeSize, you can also consider the following products.

Fast UK address, email & phone validation APIs for developers. Official Royal Mail PAF data. Pay as you go, 100 free lookups.
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WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.
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We help businesses improve UX and data quality with a cutting edge address validation service.
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WizTree quickly finds the files and folders using the most space on your hard drive. It scans the MFT (Master File Table) instead of crawling the entire disk which makes it very fast.
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Fetchify delivers fast, accurate address, email, phone and bank validation tools that help businesses capture clean, verified customer data, reduce failed deliveries and improve checkout experiences worldwide.
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Baobab Disk Usage Analyzer is one of the light-weight disk analyzers that offers you a chance to view and monitor the disk usage & folder structure without any hassle.
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