
Every Voice
True Causes
Hillary Clinton
Platformative
Decidim
Field the Bern
LiquidFeedback
Know what your organization is thinking.
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, Polis 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 | pol.is | zip-codes.com |
| Company | — | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of Polis 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 Polis yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Polis Review: Boy, Those Ancient Greeks Sure Loved Wheat! - By Board Of It
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Polis and ZIP Code API. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

Polis: Deferendum offers a more streamlined approach to group decision-making, where members can participate in debates and voting on solutions remotely and without the need for face-to-face meetings. Polis, on the...
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Recommendations tracked on public social media and blogs since March 2021.

Related: https://pol.is/home Pol.is is a tool that uses ML to synthesize these shared views and provide inisght into both areas of consensus and discordance. I am not sure of the specific relationships but it has been championed by... - Source: Hacker News / over 1 year ago
Vtaiwan is inspiring beyond words, and I hope to give Audrey tang a big hug one day. It was forked from Polis I think - https://pol.is/home. - Source: Hacker News / over 3 years ago
If you are interested in reading more about the tool itself here's their homepage, it's pretty neat! Source: about 4 years ago
Tracking ZIP Code API since May 2026.
When comparing Polis and ZIP Code API, you can also consider the following products.

A mobile app to lobby your elected representatives.
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Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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True Causes is a tool for group root-cause analysis at scale: participants independently propose and link causes, building one shared causal map whose high-leverage roots identify what to act on. It digitizes and scales Structured Democratic Dialogue
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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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