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

Slite
Confluence
Notion
Nuclino
GetGuru
Archbee.io
GitBook
Tettra is a company wiki that helps teams manage and share organizational knowledge.

Which is more popular?
Based on our record, Tettra seems to be more popular. It has been mentioned 2 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 | zip-codes.com | tettra.com |
| 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 Tettra yet.
What each product offers, as listed by its team.

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Recommended for
No analysis of Tettra yet.
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Tettra app: Organize processes & team documentation
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Tettra is a knowledge management and internal documentation tool that is designed to help teams organize, share, and collaborate on internal knowledge and documentation.
As for the pricing, like most other KM software, Tettra’s free for smaller teams (under ten users). If you have between 10 and 250 users, you’ll pay $10 per user every month and get unlimited storage and version history.
A simple and smart wiki tool, Tettra helps you document your business processes, policies, and other critical information in a centralized platform. Answering employees’ questions and onboarding new employees is a...
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
Tettra kills repetitiveness by organizing knowledge from Slack and MS Teams. - Source: dev.to / almost 4 years ago
Tettra - The best way to organize and share knowledge with your teammates. - Source: dev.to / over 4 years ago
When comparing ZIP Code API and Tettra, 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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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Confluence is content collaboration software that changes how modern teams work
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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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