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, TailScale seems to be more popular. It has been mentioned 556 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 | tailscale.com |
| Pricing | — | |
| Company | Startup from the United States · 2026 | Startup from Canada · 10 - 19 employees · 2019 |
| 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 TailScale yet.
What each product offers, as listed by its team.

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Why this product is good
Recommended for
Overall verdict
Why this product is good
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The Byte - Tailscale Private networks made easy
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Tailscale allows you to create a secure virtual private network between your servers, computers, and cloud instances using the WireGuard protocol from a binary executable.
They make the already great wireguard even better! Installation and configuration is a breeze, can easily connect to machines behind firewall(s) without altering anything. Definitely made life easier.
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
Put your computer and phone on the same private network with Tailscale, so the computer is reachable from anywhere without opening ports. - Source: dev.to / 7 days ago
Tailscale connects the Mac and the phone in a private network. As long as the Mac is on and online, I can reach herdr from my phone, anywhere, and keep talking to the agents without carrying the computer. - Source: dev.to / 3 days ago
Besides a messaging channel, I also have Tailscale set up so I can access my server remotely. This allows me to still connect to my Kiro Crew instance from my phone even when I'm out and about. I've had this setup since well before Kiro... - Source: dev.to / 4 days ago
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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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Netmaker automates mesh VPN's and software-defined networks using WireGuard.
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