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

Consul
Prioneer.io
LiquidFeedback
Jina Rationale
Loomio
DemocracyOS
GitLab
Free Open-Source participatory democracy for cities and organizations

Which is more popular?
Based on our record, Decidim seems to be more popular. It has been mentioned 1 time 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 | decidim.org |
| Pricing | — | |
| 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 Decidim yet.
What each product offers, as listed by its team.

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

Overall verdict
Why this product is good
Recommended for
No analysis of Decidim yet.
Walkthroughs and reviews on video.
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Decidim: From social to political network
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using ZIP Code API and Decidim. 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.
Wow, thank you. This is fantastic. There is also Decidim from the EU. It works if a lot of people use these, so making it relevant to a person's daily life matters. Source: about 5 years ago
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Prioneer is a stack ranking tool. Get people's priorities · Research customer pain points · Make team decisions · Create beautiful ranking surveys in 1 minute!
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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Online voting system (german & english) for Interactive Democracy, which is used by the Pirate...
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