
Democracy.io by EFF
Vote Smart
Vote Forward
Ballotpedia
5 Calls
WhoAreMyRepresentatives
GovTrack.us
Civic engagement application.
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, ResistBot seems to be more popular. It has been mentioned 162 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 | resist.bot | zip-codes.com |
| Company | — | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of ResistBot 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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An editorial look at what each product does well and who it suits.

No analysis of ResistBot yet.
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using ResistBot 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.

Contact your representative and two senators using Resistbot, Democracy.io, or manually. And ask other people to do so as well. Sure, it’s minuscule, but that’s the main tool we’ve got afaik. Source: almost 3 years ago
I discovered Resistbot a few years ago and have since contacted government representatives hundreds of times - it makes the process so easy. I do it through Facebook messenger. There's also a "trending" feature where I can see the... Source: almost 3 years ago
You can also use something like https://resist.bot to send messages to both at the same time. Source: almost 3 years ago
Tracking ZIP Code API since May 2026.
When comparing ResistBot and ZIP Code API, you can also consider the following products.

A simpler way to send messages to Congress
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Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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Vote Smart, formerly called Project Vote Smart, is a non-profit, non-partisan research organization...
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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