
Vote Smart
On the Issues
Facebook Town Hall
GovTrack.us
Ballotpedia
Votegraph
IdeoQuiz
See which American political parties, candidates, and ballot initiatives match your beliefs based on the 2019 issues that are most important to you.
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, ISideWith seems to be more popular. It has been mentioned 23 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 | isidewith.com | zip-codes.com |
| Company | — | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of ISideWith 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.

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

No analysis of ISideWith yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
ISideWith 2019 Edition!: Guess what, I'm still a Libertarian.
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How often each product is chosen within a category, 0–100% relative to the other.

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

We should all use isidewith.com before each vote. After taking a quiz about where you stand on the issues, it gives a percentage match ranking with candidates. I use it to skip the horse and pony show and get to the point. Source: over 3 years ago
I wish I Side With done better coverage for Australians. Source: over 3 years ago
Totally agree. In reality, there are a ton of more nuanced spectrums that are more relevant (isidewith.com). Source: over 3 years ago
Tracking ZIP Code API since May 2026.
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On the Issues or OnTheIssues is an American non-partisan, non-profit organization providing...
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Easily view the Facebook Pages of Local, State, and Federally elected officials according to your...
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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