
usZIPCodes.org
Zipcodestack
Check water quality, product recalls, energy rebates, and safety alerts for any U.S. ZIP code. Free reports powered by EPA and government data.

Managed Hosting for developers, entrepreneurs, and businesses like yours

Which is more popular?
Based on our record, ZipCheckup seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | zipcheckup.com | opalstack.com |
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| Company | Startup from the United States · 1 - 9 employees · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


ZipCheckup analyzes 50+ federal data sources (EPA, FEMA, CDC, USGS, Census) to generate free home safety reports for all 42,679 U.S. ZIP codes. Covers water quality, lead risk, PFAS contamination, flood risk, radon, wildfire, earthquake, mold, and 9 more safety categories. 283,000+ pages, updated...
No description of Opalstack yet.
What each product offers, as listed by its team.


No features have been listed yet.
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
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using ZipCheckup and Opalstack. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


I spent the last few months stitching it all together into one site. ZipCheckup. Type in a ZIP code, get a full home safety profile. 278,000 pages. 50+ data sources. Running on $5/month. - Source: dev.to / 5 months ago
Tracking Opalstack since Sep 2023.
When comparing ZipCheckup and Opalstack, you can also consider the following products.

Use our free ZIP Code Analysis Tool to find city, state, county, population, and timezone details for any U.S. ZIP code. Fast, accurate, and privacy-safe lookup.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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