
Slite
Confluence
Notion
Nuclino
GetGuru
Archbee.io
GitBook
Tettra is a company wiki that helps teams manage and share organizational knowledge.
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, 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 | tettra.com | zip-codes.com |
| Pricing | — | |
| Company | — | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of Tettra 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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Tettra app: Organize processes & team documentation
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Share your experience with using Tettra and ZIP Code API. For example, how are they different and which one is better?
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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...
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Recommendations tracked on public social media and blogs since March 2021.

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
Tracking ZIP Code API since May 2026.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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