
CalyxOS
LineageOS
Android
Ubuntu Touch
CopperheadOS
postmarketOS
e.foundation /e/
GrapheneOS is an open source privacy and security focused mobile OS with Android app compatibility.
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

Which is more popular?
Based on our record, GrapheneOS seems to be more popular. It has been mentioned 402 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 | grapheneos.org | zip-codes.com |
| Pricing | — | |
| Company | — | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of GrapheneOS yet.
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...
What each product offers, as listed by its team.

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Overall verdict
Why this product is good
Recommended for
Overall verdict
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Walkthroughs and reviews on video.
GrapheneOS Review: Your BEST Secure & Private Mobile OS!
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External articles and on-site reviews we used to compare the two products.

GrapheneOS is a modern and sleek mobile operating system with a strong focus on privacy and robust security features. Developed as an open-source project, it builds upon the foundations of the Android Open Source...
If security and privacy are your main reasons behind your search for an Android alternative, GrapheneOS fits the bill perfectly. It’s a security-hardened operating system, built with top-notch privacy protection in...
GrapheneOS in an open source privacy-focused mobile operating system. It is focused on the research and development of privacy and security technology.
We have no reviews of ZIP Code API yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.

But you can install other OSes such as Graphene on Android phones, I dont think you can do that on iPhones can you? https://grapheneos.org/. - Source: Hacker News / 29 days ago
You've got the ideal hardware to move to GrapheneOS https://grapheneos.org/. - Source: Hacker News / about 2 months ago
Zero Google services are shippsx by default, but you can install Play Store and Services in a sandbox and it has minimal privacy problems, depending on the permissions you give it. Their docs are really good, not only for their phone but... - Source: Hacker News / 4 months ago
Tracking ZIP Code API since May 2026.
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Operating system for smartphones and tablet computers, based on the Android
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Android is an open source mobile operating system initially released by Google in 2008 and has since become of the most widely used operating systems on any platform.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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