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Disk Inventory X VS PostalDataPI

Compare Disk Inventory X VS PostalDataPI and see what are their differences

Disk Inventory X

Disk Inventory X is an open source disk space analyzer and disk management tool for the Mac OS X operating systems that allow the OS X users to check for the availability of free space in their machines.

Rating
5.0 · 1 review
Pricing
Free
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Alternatives Is it good?
PostalDataPI

The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.

Rating
0 reviews
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Alternatives Is it good?
CloudGPU.app
GPU rental by the minute plus an OpenAI-compatible AI API, on one prepaid balance. Independent service. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, Disk Inventory X seems to be more popular. It has been mentioned 8 times since March 2021.

social mentions
8 vs 0
Disk Analyzer popularity
100% vs 0%
alternatives listed
84 vs 12

Base details

Website, pricing, platforms and company facts side by side.

Disk Inventory X
PostalDataPI
Website derlien.com postaldatapi.com
Pricing
Free
Official pricing
Company — Startup from the United States · 1 - 9 employees · 2026
Listed in
Hard Disk Management Disk Analyzer Hard Disk Usage Hard Drive Tools +1
APIs REST API Postal Management Zip Lookup Postcode API Geocoding Address Verification API Geolocation API Developer Tools +6

About Disk Inventory X and PostalDataPI

In their own words, as submitted to SaaSHub.

Disk Inventory X
PostalDataPI

No description of Disk Inventory X yet.

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,...

Read more about PostalDataPI

Features and specs

What each product offers, as listed by its team.

Disk Inventory X 4 features
PostalDataPI 5 features
  • Freeware
    Disk Inventory X is available as freeware, meaning there is no cost to download and use the software.
  • Visual Disk Usage Representation
    The software provides a visual representation of disk usage through a tree map, which allows users to easily identify large files and folders that are taking up space.
  • User-Friendly Interface
    Its interface is designed to be intuitive and easy to use, even for users who are not technically inclined.
  • Cross-Platform
    Disk Inventory X is compatible with older versions of macOS, providing utility for users with legacy systems.

Possible disadvantages

  • Lack of Advanced Features
    Compared to other disk management tools, Disk Inventory X lacks some advanced features like automated cleanup or file management options.
  • Performance Issues with Large Disks
    The application might experience slower performance when scanning very large disks or volumes with a high number of files.
  • Outdated Interface
    The user interface is considered outdated by some users, lacking modern design elements seen in newer software.
  • Limited Updates and Support
    Disk Inventory X does not receive frequent updates, which can lead to compatibility issues with the latest macOS versions and limited support for newer features.
  • Specialized Postal Data
    PostalDataPI focuses specifically on postal and address-related data, providing dedicated endpoints for ZIP code lookups, address validation, and geographic postal information, making it a niche solution for mailing and logistics needs.
  • Simple API Integration
    The API appears to offer straightforward RESTful endpoints that are relatively easy to integrate into existing applications, requiring minimal setup and configuration for developers.
  • Useful for Address Validation
    The service can help businesses validate and standardize mailing addresses, reducing undeliverable mail, saving postage costs, and improving data quality in customer databases.
  • Geographic Data Enrichment
    PostalDataPI can enrich address data with additional geographic information such as coordinates, county, and timezone details associated with postal codes, which is valuable for analytics and location-based services.
  • Lightweight and Focused
    As a specialized micro-API, it avoids the bloat of larger platforms, offering a focused toolset that does one thing well — handling postal and ZIP code data without unnecessary complexity.

Possible disadvantages

  • Limited Public Awareness
    PostalDataPI is not widely known or widely reviewed compared to major competitors like SmartyStreets, Google Geocoding API, or Melissa Data, making it harder to assess reliability and long-term viability.
  • Sparse Documentation and Community Support
    As a smaller or lesser-known service, it may lack comprehensive documentation, tutorials, and an active developer community, which can make troubleshooting and advanced usage more challenging.
  • Uncertain Data Coverage
    It is unclear how comprehensive the postal data coverage is — whether it supports international postal codes or is limited to specific countries, which could be a significant limitation for global applications.
  • Unknown Uptime and Reliability Track Record
    Without widespread usage reports or published SLA guarantees, it can be difficult to trust the service for mission-critical applications that require high availability and consistent performance.
  • Limited Feature Set Compared to Competitors
    Larger address validation and postal data providers offer additional features like autocomplete, batch processing, CASS certification, and deliverability scoring that PostalDataPI may not provide.

Analysis

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

Disk Inventory X
PostalDataPI

No analysis of Disk Inventory X yet.

Overall verdict

  • I don't have verified, up-to-date information specifically about PostalDataPI (postaldatapi.com), including details on its accuracy, pricing, uptime, or customer reviews. I can't confirm whether it's a good product without more direct data or firsthand testing, so I'd recommend evaluating it yourself using the criteria below before committing.

Why this product is good

  • Unable to verify specific claims about data accuracy, coverage, or update frequency for this service
  • No confirmed information on pricing tiers, rate limits, or API reliability (SLA/uptime)
  • No verified user reviews, testimonials, or third-party comparisons available
  • Company background, support quality, and documentation quality are unconfirmed
  • If considering this service, check for: free trial/sandbox access, transparent pricing, data source citations, response time benchmarks, and independent reviews on sites like G2 or Trustpilot

Recommended for

  • Not able to make a specific recommendation without verified data
  • Best approach: developers needing postal/address validation APIs should compare this against established alternatives (e.g., SmartyStreets, Lob, Google Maps Geocoding API, USPS Web Tools) based on documented accuracy and pricing
  • Suitable evaluation candidates: teams willing to test the API directly with sample data before integrating into production systems

Videos

Walkthroughs and reviews on video.

Disk Inventory X 2 videos + Add
PostalDataPI 2 videos + Add

HOW TO GET THE MOST OUT OF YOUR MAC USING Disk Inventory X

More videos

  • - Disk Inventory X Review

PostalDataPI Now Returns 18 Fields Per Postal Code — for 240+ Countries

More videos

  • - PostalDataPI Tutorial: Your First Postal Code API Call in 5 Minutes

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Disk Inventory X
PostalDataPI
100% 100%
Disk Analyzer
0% 0%
0% 0%
Postcode API
100% 100%
100% 100%
Hard Disk Usage
0% 0%
0% 0%
Address Verification API
100% 100%

User comments

Share your experience with using Disk Inventory X and PostalDataPI. For example, how are they different and which one is better?

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

Disk Inventory X 5.0 · 1 review
PostalDataPI no reviews yet

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We have no reviews of PostalDataPI yet. Be the first one to post

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

Disk Inventory X 8 mentions
PostalDataPI 0 mentions
  • Apple, What Have You Done?
    I end up using https://derlien.com/ "Disk Inventory X" regularly to find stuff to clean up. - Source: Hacker News / 9 months ago
  • I have deleted pretty much everything off of my Macbook and yet it says there is 94.26 GB of “Other Volumes” taking up space that I can’t access. Does anyone know how to fix?
    Try this, Disk Inventory X: http://derlien.com/. Source: almost 4 years ago
  • So Im having trouble with storage. I have an external drive but I noticed my M1 iMac with 256GB of storage was getting pretty full. Upon further investigation it seems as though my user folder is 202GB, yet when I open up the subfolders in my user folder they don't add up. Any ideas?
    For checking which files are large (like windirstat) I'd recommend Disk Inventory X: https://derlien.com/. Source: over 4 years ago

View more

Tracking PostalDataPI since Apr 2026.

Alternatives to Disk Inventory X and PostalDataPI

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