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

Color Hunt
Adobe Color CC
Paletton
Color Palette Generator
UI Colors
Grabient
ColorSpace
The super fast color schemes generator! Create, save and share perfect palettes in seconds!

Which is more popular?
Based on our record, Coolors.co seems to be more popular. It has been mentioned 546 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 | coolors.co |
| Company | Startup from the United States · 2026 | Startup from Italy |
| 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 Coolors.co 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
Designers, artists, and anyone working on projects that require harmonious color schemes, such as web design, graphic design, and interior design.
Walkthroughs and reviews on video.
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How to Create Color Palettes with Coolors.co
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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 Coolors.co. 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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Recommendations tracked on public social media and blogs since March 2021.

Tracking ZIP Code API since May 2026.
Hit spacebar. New palette. Lock the colours you like. Keep hitting spacebar. Export to CSS variables when you're done. That is the entire workflow. I have shipped more side projects because of Coolors than I care to admit — it removes... - Source: dev.to / 6 months ago
Coolors.co is a fast and convenient online color palette tool, ideal for designers or anyone seeking color inspiration. - Source: dev.to / about 1 year ago
Colors → Stick to 3–5 main colors. Tools like Coolors can help. - Source: dev.to / about 1 year ago
When comparing ZIP Code API and Coolors.co, 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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Curated collection of beautiful colors, updated daily
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Free Zip Code API - Free Postal Code Validation | Zipcodestack
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Generates color themes that can inspire any project.
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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
Compare PostalDataPI to ZIP Code API or Coolors.co:
