
Postio.co.uk
Ideal postcodes
Fetchify
Smarty
Data8 UK
ZIP Code API
Data8 UK PredictiveAddress
The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.

LeetCode
The bug you can't spot today ships tomorrow. Train before the incident: one realistic AI pull request a day, graded against a canonical review. Free, no signup.

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


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,...
No description of DiffDojo 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 DiffDojo yet.
Walkthroughs and reviews on video.
PostalDataPI Now Returns 18 Fields Per Postal Code — for 240+ Countries
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How often each product is chosen within a category, 0–100% relative to the other.


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When comparing PostalDataPI and DiffDojo, you can also consider the following products.

Fast UK address, email & phone validation APIs for developers. Official Royal Mail PAF data. Pay as you go, 100 free lookups.
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Practice and level up your development skills and prepare for technical interviews.
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We help businesses improve UX and data quality with a cutting edge address validation service.
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Fetchify delivers fast, accurate address, email, phone and bank validation tools that help businesses capture clean, verified customer data, reduce failed deliveries and improve checkout experiences worldwide.
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Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
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Build Confidence in your data with Data8. We are the UK's Premier Data Solutions Provider for all your data validation needs, Contact us today for more information.
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