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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, Gather Town seems to be more popular. It has been mentioned 70 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 | gather.town | zip-codes.com |
| Pricing | — | |
| Company | — | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of Gather Town 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.

2019-2020: We prototyped lots of telepresence ideas, our work shown here: https://siemprecollective.com/ 2020-2022: We built https://gather.town, which during COVID blew up across every use-case possible: conferences, birthday parties,... - Source: Hacker News / about 1 year ago
No self-hosted version yet. You would need to trust us in the same way you trust your other SaaS apps that host company IP (e.g. Slack, Notion, Github, etc.) I get that's a big ask from a startup. If it helps, we are a company that's... - Source: Hacker News / about 1 year ago
Tools like Gather Town to encourage more ad hoc group interaction. One team I led used this tool daily for nearly a year, and the frequency and quality of our interactions were on par with an in-person office. - Source: dev.to / about 3 years ago
Tracking ZIP Code API since May 2026.
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