
ISideWith
On the Issues
Ballotpedia
GovTrack.us
Facebook Town Hall
Congress.gov
Votegraph
Vote Smart, formerly called Project Vote Smart, is a non-profit, non-partisan research organization...
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, Vote Smart seems to be more popular. It has been mentioned 27 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 | justfacts.votesmart.org | zip-codes.com |
| Company | — | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of Vote Smart 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...
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Recommendations tracked on public social media and blogs since March 2021.

I take info about candidates from various sources. Folks should checkout https://justfacts.votesmart.org/ to judge an individual by merit and history, as opposed to pure party affiliation. Source: over 3 years ago
The person who posted the League of Women Voters website beat me to it. There’s also Vote 411 and Vote Smart, Vote.org, and I Side With. All of these have a lot of good info for national, state, and local elections. Source: over 3 years ago
If you wish to find more about US public officials' funding sources, ratings on various issues, etc, here. It's not perfect, but still useful for learning who you'd prefer. Source: over 3 years ago
Tracking ZIP Code API since May 2026.
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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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Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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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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Ballotpedia is a nonpartisan online political encyclopedia.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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