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

ISideWith
Vote Smart
Ballotpedia
Facebook Town Hall
GovTrack.us
Votegraph
Congress.gov
On the Issues or OnTheIssues is an American non-partisan, non-profit organization providing...

Which is more popular?
Based on our record, On the Issues seems to be more popular. It has been mentioned 10 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 | ontheissues.org |
| 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 On the Issues 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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No analysis of On the Issues yet.
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using ZIP Code API and On the Issues. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
Seems a bit different. I used to buy into the "both are wrong and on the same team" theory. That is just an incorrect and false narrative. We elect our representatives... There is a place we can look at their past voting records, etc.... Source: over 3 years ago
I agree. We all need to look into voting records, etc. Look who the best person is to put in office to work for us. I use ontheissues.org as I am sure there are other sites and articles as well. The website I posted lets you know... Source: over 3 years ago
Ontheissues.org and ballotpedia.org. Source: about 4 years ago
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See which American political parties, candidates, and ballot initiatives match your beliefs based on the 2019 issues that are most important to you.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Vote Smart, formerly called Project Vote Smart, is a non-profit, non-partisan research organization...
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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Ballotpedia is a nonpartisan online political encyclopedia.
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