Postcoder Alternatives (January 2026)

Address Lookup, Rooftop Geo, Bank, Mobile & Email Validation - Postcoder

Postcoder is the API for address lookup & form validation. Improve your conversion rates and capture better quality customer data.

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Address Validation API | Address Verification API Services - USPS API - PostGrid™

https://www.postgri

.com/address-verification-api/

Verify/Validate Addresses using PostGrid’s CASS (USPS) and SERP (Canada Post) certified Address validation and verification API and services.

Address Verification, Data Validation & Geocoding Software | Loqate, a GBG solution

https://www.loqat

.com/

Improve data quality by capturing correct UK addresses. Boost conversions and user experience with postcode address verification and geocoding technology.

Address Validator: Postal Address Validation & Address Verification Service

https://www.byteplan

.com/address-validator/

With our free postal address verification and international address validation service you can easily verify if any USPS or international postal address is valid and deliverable.

Bulk Email Address Verification and Validation API - Bouncer

https://www.usebounce

.com/

Improve your email deliverability with Bouncer's robust email verification and deliverability platform. 🌐

GeoPostcodes: International Postal & Zip Code Database

https://www.geopostcode

.com/

GeoPostcodes provides the world’s most comprehensive postal/zip code database. Complete, accurate, always up-to-date and enterprise-ready.

LocationIQ - Free Reverse Geocoding API, Geocoding API, Autocomplete API

https://www.locationi

.com/

Affordable Google Maps alternative for Reverse Geocoding, Geocoding, Maps and Routing APIs. Generous free tier, offering Enterprise-grade APIs for everyone!

mailboxlayer API | Free, Powerful Email Validation API

https://mailboxlaye

.com/

Simple and powerful email verification JSON API using SMTP, typo checks, syntax validation, and free and disposable provider filtering. Free for personal use.

USPS & International Address Verification - Smarty

http://smart

.com/

Address Verification for USPS & International Addresses. Try our easy-to-use APIs, list processing tools and more.

Geocoding API and autocomplete | PlaceKit

https://placeki

.io/

PlaceKit is a worldwide geocoding API providing fast and accurate address autocomplete, store locator, and two-way geocoding for your app.