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

SerpApi
Moz
Searchmetrics Suite
DemandSphere
Clearscope
Direction Local
Pro Rank Tracker
DataForSEO offers API data for SEO companies that deliver results of tasks for Rank tracking, SERP, Keyword data and On-page APIs.

Which is more popular?
Based on our record, DataForSEO seems to be more popular. It has been mentioned 12 times since March 2021.
Website, pricing, platforms and company facts side by side.
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ZIP
ZIP Code API
|
|
|
|---|---|---|
| Website | zip-codes.com | dataforseo.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 DataForSEO 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
No analysis of DataForSEO yet.
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using ZIP Code API and DataForSEO. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
DataForSEO is the one paid source the early phases can’t fake: search volume, keyword difficulty, live SERPs, competitor traffic, backlinks and WHOIS, over its MCP server or REST API. Without it, the demand criteria show BLOCKED. - Source: dev.to / 2 days ago
Our verdict is grounded in the desk's own demand measurements: "We priced 693 keywords in the AI and developer-tooling space using DataForSEO volume and difficulty data. Only 72 (10.4%) cleared a winnable bar of 150-6,000 monthly... - Source: dev.to / 7 days ago
We priced 656 keywords in the AI and developer-tooling space using DataForSEO volume and difficulty data, and 72 of the 656 cleared our winnable bar: 150-6,000 monthly searches, difficulty 20 or below, a genuine technical term, and at... - Source: dev.to / about 2 months ago
When comparing ZIP Code API and DataForSEO, 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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Access real-time results from Google and 100+ search engines with a simple API. No proxies, CAPTCHAs, or parsing required.
Compare SerpApi to ZIP Code API or DataForSEO:

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

Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
Compare Moz to ZIP Code API or DataForSEO:

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