PostalCodes.info VS PostalDataPI

Compare PostalCodes.info VS PostalDataPI and see what are their differences

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PostalCodes.info

Postal code lookup API and downloadable country datasets for address validation, checkout, logistics and geocoding workflows.

PostalDataPI

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

Landing page //
2026-05-09

Landing page //
2026-04-08

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, timezone, three levels of administrative hierarchy, elevation, and more. Sub-5ms cached responses.

Works everywhere: US ZIP codes, UK postcodes, German PLZ, Japanese postal codes, Canadian FSAs, and 230+ more. Format normalization handles case, spacing, and hyphen variations automatically.

Get started in 60 seconds: 1,000 free queries on signup, no credit card required. SDKs for Python and Node.js. MCP server for AI agents (Claude, Cursor, etc.).

Built for developers: REST API, consistent JSON responses across all countries, OpenAPI spec, llms.txt for AI agent discovery.

PostalCodes.info

Website: postalcodes.info
Pricing URL: -
Release Date: -

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PostalDataPI

Website: postaldatapi.com
Pricing URL: Official PostalDataPI Pricing
Release Date: 2026 March
Startup details
Country: United States
State: ID
City: Eagle
Founder(s): Thom Ives
Employees: 1 - 9

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PostalCodes.info features and specs

Global Coverage
PostalCodes.info provides postal code data for a wide range of countries worldwide, making it useful for international applications that need to validate or look up postal codes across multiple regions.
Simple REST API
The API follows a straightforward RESTful design, making it easy for developers to integrate into their applications without a steep learning curve or complex authentication flows.
Geolocation Data
The service provides geographic coordinates (latitude and longitude) associated with postal codes, which is useful for mapping, distance calculations, and location-based features.
Lightweight Responses
The API returns concise, structured data that is easy to parse and doesn't require heavy bandwidth, making it suitable for applications where performance matters.
Useful for Address Validation
The service can be used to validate and auto-complete address information based on postal codes, improving user experience in forms and checkout processes.

Possible disadvantages of PostalCodes.info

Limited Documentation
The API documentation can be sparse and lacks comprehensive examples, detailed error code explanations, and thorough guides, making it harder for developers to troubleshoot issues or understand all available features.
Data Accuracy Concerns
Some postal code databases may contain outdated or incomplete data for certain countries, as postal codes change over time and keeping a global database fully up-to-date is challenging.
Rate Limiting and Usage Restrictions
The API may impose rate limits or usage caps that could be restrictive for high-traffic applications, potentially requiring paid plans to accommodate larger volumes of requests.
Limited Additional Features
Compared to more established geocoding and postal code services (like Google Maps API or SmartyStreets), PostalCodes.info may lack advanced features such as address parsing, fuzzy matching, or detailed administrative boundary data.
Uncertain Reliability and Support
As a smaller, less well-known service, there may be concerns about long-term availability, uptime guarantees, and the quality of customer support compared to major established providers.

PostalDataPI features and specs

Specialized Postal Data
PostalDataPI focuses specifically on postal and address-related data, providing dedicated endpoints for ZIP code lookups, address validation, and geographic postal information, making it a niche solution for mailing and logistics needs.
Simple API Integration
The API appears to offer straightforward RESTful endpoints that are relatively easy to integrate into existing applications, requiring minimal setup and configuration for developers.
Useful for Address Validation
The service can help businesses validate and standardize mailing addresses, reducing undeliverable mail, saving postage costs, and improving data quality in customer databases.
Geographic Data Enrichment
PostalDataPI can enrich address data with additional geographic information such as coordinates, county, and timezone details associated with postal codes, which is valuable for analytics and location-based services.
Lightweight and Focused
As a specialized micro-API, it avoids the bloat of larger platforms, offering a focused toolset that does one thing well — handling postal and ZIP code data without unnecessary complexity.

Analysis of PostalCodes.info

Overall verdict

PostalCodes.info appears to be a functional reference tool for looking up postal/ZIP codes and administrative boundaries across countries, useful for quick lookups but likely limited compared to official postal authority databases or premium geocoding APIs for bulk/commercial use.

Why this product is good

Provides free access to postal code information for multiple countries
Simple interface for quick individual lookups
No registration typically required for basic searches
Covers international postal code systems beyond just one country

Recommended for

Individuals needing a quick one-off postal code lookup
Students or researchers studying geographic/administrative divisions
Small personal projects requiring occasional postal code verification
Users who don't need bulk data or API integration

Analysis of PostalDataPI

Overall verdict

I don't have verified, up-to-date information specifically about PostalDataPI (postaldatapi.com), including details on its accuracy, pricing, uptime, or customer reviews. I can't confirm whether it's a good product without more direct data or firsthand testing, so I'd recommend evaluating it yourself using the criteria below before committing.

Why this product is good

Unable to verify specific claims about data accuracy, coverage, or update frequency for this service
No confirmed information on pricing tiers, rate limits, or API reliability (SLA/uptime)
No verified user reviews, testimonials, or third-party comparisons available
Company background, support quality, and documentation quality are unconfirmed
If considering this service, check for: free trial/sandbox access, transparent pricing, data source citations, response time benchmarks, and independent reviews on sites like G2 or Trustpilot

Recommended for

Not able to make a specific recommendation without verified data
Best approach: developers needing postal/address validation APIs should compare this against established alternatives (e.g., SmartyStreets, Lob, Google Maps Geocoding API, USPS Web Tools) based on documented accuracy and pricing
Suitable evaluation candidates: teams willing to test the API directly with sample data before integrating into production systems