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

Confluence
Slite
Notion
Slab
Archbee.io
GitBook
DokuWiki
Nuclino works like a collective brain, helping teams bring all their knowledge, docs, and projects together in one place. It's a modern, simple, and blazingly fast way to collaborate.

Which is more popular?
Based on our record, Nuclino 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 | nuclino.com |
| Pricing | — | |
| Platforms | — | |
| Company | Startup from the United States · 2026 | Startup from Germany |
| 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 Nuclino yet.
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.

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Why this product is good
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Overall verdict
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Recommended for
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Nuclino - 2019 Review | Features, Pricing & Opinions
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External articles and on-site reviews we used to compare the two products.

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Nuclino is a cloud-based team collaboration and documentation tool that allows teams to create, organize, and share documentation in a collaborative environment.
Nuclino is team collaboration software that brands itself as “your team’s collective brain.” The tool helps you bring all your company knowledge, docs, and projects together, allowing for smooth collaboration.
Nuclino is a simple yet modern online documentation software that enables your teams to work collaboratively on projects and documents. It provides you with a unified space where you can build and share knowledge,...
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
Nuclino - storing concept art, story design info, etc. This is similar to Google Docs, but it can be organized so much more efficiently for game design. Source: over 4 years ago
When comparing ZIP Code API and Nuclino, you can also consider the following products.

Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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Confluence is content collaboration software that changes how modern teams work
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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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All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
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