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

Facebook for Business
SocialPilot
Fomo
PostPlanner
SocialXpand
RiteTag
Walls.io
Build Relationships. Build Buzz. Web-based software that helps the world’s best marketers promote their products, services and content.

Which is more popular?
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 | buzzstream.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 Buzzstream 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
BuzzStream is recommended for digital marketers, SEO professionals, PR agencies, and content creators who regularly engage in outreach campaigns and require a centralized platform to manage their communications and relationships efficiently. It is especially beneficial for teams looking to automate and optimize their influencer outreach processes.
Walkthroughs and reviews on video.
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Buzzstream Review and Tutorial
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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 Buzzstream. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

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Buzzstream is an all-in-one digital PR and link building tool that makes outreach easy. BuzzStream helps marketers to build links or send targeted emails for content promotion (e.g new content on their site) easily....
Buzzstream is a tool that does research into relevant influencers in a certain niche. You can also organize outreach, reach prospects, and follow up with influencers.
Buzzstream is a powerful tool for managing link building partnerships and nurturing relationships with industry influencers and website owners. Here’s how you can use Buzzstream for effective link building...
When comparing ZIP Code API and Buzzstream, 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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Facebook Business gives the latest news, advertising tips, best practices and case studies to meet the business goals.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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SocialPilot is an app designed to help businesses and professionals with social media marketing.
Compare SocialPilot to ZIP Code API or Buzzstream:

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

Fomo turns your site into the online equivalent of a busy store
Compare Fomo to ZIP Code API or Buzzstream: