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The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | monarchapis.com | postaldatapi.com |
| Pricing | — | |
| Company | Startup from the United States | Startup from the United States · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Monarch yet.
PostalDataPI is a global postal code validation and enrichment API covering 240+ countries and territories. One API, one key, one flat rate — $0.000028 per query with no tiers or subscriptions. What you get back: Up to 18 metadata fields per postal code — city, state/region, coordinates,...
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Researchers, bioinformaticians, and developers working in genomics, proteomics, and other biological data fields who require extensive, reliable data resources and user-friendly analysis tools.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Monarch Money [JUST LAUNCHED]: Honest Review
More videos
PostalDataPI Now Returns 18 Fields Per Postal Code — for 240+ Countries
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Monarch and PostalDataPI. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Best for: Couples who want a shared wealth-tracking dashboard and don't need disciplined budget execution. If it's down to Monarch and one other app, we've refereed the big matchups: YNAB vs Monarch and Copilot vs...
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