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

Auth0
OneLogin
Microsoft Azure Active Directory
Ping Identity
Amazon Cognito
LoginRadius
Atlassian Crowd
Enterprise-grade identity management for all your apps, users & devices
Which is more popular?
Based on our record, Okta seems to be more popular. It has been mentioned 7 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 | okta.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 Okta 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 Okta yet.
Walkthroughs and reviews on video.
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Okta | What Does Okta Do?
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External articles and on-site reviews we used to compare the two products.

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Okta is ideal for large-scale applications and enterprises with complex identity requirements.
Okta is one of the popular cloud solutions that allow SSO vendors to easily access cloud and on site applications via any device, from anywhere at any time with the use of robust security policies. Able to directly...
Okta is again a flagbearer of password-less security. However, you can ask for the strongest passwords with Okta as well.
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
Sign up for an Employee Identity Solution (IdP) that provides OAuth, there are actually many solutions here, Google Workspace, Okta, Microsoft Entra ID, Ping Identity. - Source: dev.to / almost 2 years ago
The majority of the codebases I've worked on over the years have always favoured using JSON web-tokens (JWT) or Authentication-as-a-Service platforms (Auth0, Okta etc) for authentication logic. These are indeed excellent choices!... - Source: dev.to / almost 4 years ago
This happened to me three days ago! A new employee had trouble logging into our intranet, which is at OurCompanyName.okta.com. He was going to okta.com. Source: about 4 years ago
When comparing ZIP Code API and Okta, 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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Auth0 is a program for people to get authentication and authorization services for their own business use.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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On-demand SSO, directory integration, user provisioning and more
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
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Azure Active Directory is a comprehensive identity and access management cloud solution that provides a robust set of capabilities to manage users and groups and help secure access to applications including Microsoft online services like Office 365 …
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