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

LucidChart
yEd
OmniGraffle
PlantUML
Dia
Miro
Visio
Online diagramming application

Which is more popular?
Based on our record, draw.io seems to be more popular. It has been mentioned 716 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 | drawio.com |
| Pricing | — | |
| 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 draw.io 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
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
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draw.io - Draw diagrams in the cloud or as an AppImage
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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 draw.io. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

We have no reviews of ZIP Code API yet. Be the first one to post
The mission of Diagrams.net is to “provide free, high quality diagramming software for everyone.” To follow through on this mission, the Diagrams.net team says, “When companies pay us money it should be because we add...
Where do you even begin with Diagrams.net, formerly known as Draw.io? Besides being free of charge, it also has a low learning curve, so anyone can quickly start creating diagrams or whiteboards. Many people use...
There are many generic diagramming tools that can be used to design software such as diagrams.net (formerly draw.io), Miro, or Lucid Charts. These generic tools do allow a lot of flexibility but end up costing you...
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
Draw.io (available at drawio.com) is an online and offline tool that lets you create various types of diagrams, including:. - Source: dev.to / over 1 year ago
During my college days I used to use Drawio to draw wireframes and flowcharts. When I found that there is a VS Code extension that allows me to do it in the IDE it was a no brainer. I have found it is also useful whenever I am screen... - Source: dev.to / about 2 years ago
Glad you like it! :D Feel free to reuse/edit it for the Steam page if you want. Also happy to send you the draw.io file if you'd like :). Source: over 3 years ago
When comparing ZIP Code API and draw.io, you can also consider the following products.

Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
Compare Smarty to ZIP Code API or draw.io:

LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
Compare LucidChart to ZIP Code API or draw.io:

Free Zip Code API - Free Postal Code Validation | Zipcodestack
Compare Zipcodestack to ZIP Code API or draw.io:

yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.
Compare yEd to ZIP Code API or draw.io:

The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
Compare PostalDataPI to ZIP Code API or draw.io:

OmniGraffle is for creating precise graphics like website wireframes, an electrical system designs, or mapping out software class.
Compare OmniGraffle to ZIP Code API or draw.io: