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

Kissflow
Pipefy
ifttt
Apache Airflow
Make.com
Microsoft Power Automate
Tallyfy
Create beautiful rich process documents in a simple to follow checklist format. Fast, free and incredibly simple to use.
Which is more popular?
Based on our record, Process Street 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 | process.st |
| 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 Process Street 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
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Process Street: Full Review (2019)
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External articles and on-site reviews we used to compare the two products.

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The best feature of Process Street is its checklist-based interface, and the capacity to build and automate workflows with ease. The limitations could be the absence of advanced project management tools. However, it...
Process Street is a versatile workflow and process management platform that helps organizations create, optimize, and automate their operational procedures. It allows businesses to document their workflows as...
Process Street offers a friendly spreadsheet-like interface where you can quickly build workflows. Workflow instances in the system are referred to as workflow runs. Ease of use is the key selling point of Process...
Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
The only thing I found is process.st but it’s a paid service. Source: over 3 years ago
So far I am working on the idea of workflow saas app, something like notion + process.st, but much simpler to use. I haven't done any wireframes or design yet. I am just at initial stage of exploring this area. Source: over 3 years ago
I'm using process street. It can trigger different workflows using links + having a conditional workflow. Source: about 4 years ago
When comparing ZIP Code API and Process Street, 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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Kissflow is a workflow tool & business process workflow management software to automate your workflow process. Rated #1 cloud workflow software in Google Apps Marketplace.
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Pipefy is a process management software that empowers anyone to create and automate efficient workflows on their own without code.
Compare Pipefy to ZIP Code API or Process Street:

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

IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
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