
Telegram
Signal
Facebook Messenger
Element.io
Slack
Discord
LINE
WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.
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, WhatsApp seems to be more popular. It has been mentioned 24 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 | whatsapp.com | zip-codes.com |
| Pricing | — | |
| Platforms | — | |
| Company | Startup from the United States · 1,000 - 1,999 employees · 2009 | Startup from the United States · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of WhatsApp 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...
What each product offers, as listed by its team.

Possible disadvantages
An editorial look at what each product does well and who it suits.

No analysis of WhatsApp yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
How to Use Whatsapp - 2020 Beginner's Guide
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using WhatsApp and ZIP Code API. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

WhatsApp’s other claim to fame is its security features, with end-to-end encryption. These security features, although not perfect, are still considered much better than Telegram’s. WhatsApp does a good job...
WhatsApp is another highly popular messaging app that has brought end-to-end encryption to the masses. And the best part is that the encryption is enabled by default and extends to all forms of communication on...
I AM USING WHATSAPP SINCE 2015 AND STILL CURRENTLY USING IT HELPS ME TO GET IN TOUCH WITH MY FRIEND AND RELATIVES AND NOW IT ALSO HELPS ME TO DO PAYMENT VIA WHATSAPP.
We have no reviews of ZIP Code API yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.

Hi everyone. The other day a client of mine's employees started having issues with the "internet not working". After some detective work with traceroute and interviewing them about what sites they were having issues with, I determined... Source: almost 3 years ago
I believe web.whatsapp.com is being blocked by local telecom companies in order to protect their duopoly and keep Oman in tech--stone-age. If fewer people know how else the rest of the world uses the internet, then they don't have to... Source: almost 3 years ago
What's wrong with https://web.whatsapp.com/ ? Source: almost 3 years ago
Tracking ZIP Code API since May 2026.
When comparing WhatsApp and ZIP Code API, you can also consider the following products.

Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
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Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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Fast, simple & secure messaging. Privacy that fits in your pocket.
Compare Signal to WhatsApp or ZIP Code API:

Free Zip Code API - Free Postal Code Validation | Zipcodestack
Compare Zipcodestack to WhatsApp or ZIP Code API:

Facebook Messenger is a faster way to message.
Compare Facebook Messenger to WhatsApp or ZIP Code API:

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