Postcoder

Postcoder

Allies Computing
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About

Postcoder is an API from Allies Computing that gives developers a single endpoint for verifying and validating customer contact data at the point of entry. Used across sectors from healthcare to retail, it's built to drop into checkout, onboarding, and account creation flows with minimal friction. What's included: Address lookup – Postcode, partial address, or coordinate-based search across Royal Mail PAF, Ordnance Survey AddressBase, and 249 countries worldwide. Bank validation – Real-time sort code and account number verification, with branch data and direct debit eligibility returned in the response. Email validation – Domain and formatting checks with disposable address detection. Mobile validation – Live network status checks across 200+ countries. OTP verification – SMS-based one-time password delivery. Clear documentation, multi-language sample code, and a straightforward REST structure mean integration is quick. 30 day free trial with no credit card required.

About

Production REST API for US and Canadian postal-code data. Capabilities: address validation and standardization with ZIP+4 append, radius search (centroid haversine to 500 mi, or true spatial polygon intersection to 250 mi with per-result percent-inside), point-to-point distance and bearing, multi-entity autocomplete (cities, ZIPs, counties, metros, FSAs, school districts), per-ZIP enrichments — Census ACS demographics across 14 years (542 fields), congressional, state legislative, and school district lookups. Six endpoints accept US ZIP, ZIP+4, Canadian FSA, Canadian postal, or lat/lon coordinates. Batch processes up to 100 inputs. REST/JSON over HTTPS, API-key auth, CORS, OpenAPI 3 spec, public Postman collection. Free tier: 2,500 requests/day, no credit card, no expiration. Paid: Developer $49/mo, Professional $149/mo, Business $499/mo. Credit packs $19–$799.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

Organizations wanting a tool to improve their address lookup and form validation processes

Audience

Developers and product teams shipping address-validation, geocoding, or postal-data features into their own products. Primary buyers: e-commerce platforms (checkout validation), CRM/RevOps admins (lead routing and territory mapping), store-locator product teams (service-area coverage), real-estate and market-research analysts (ZIP-level demographics), and logistics teams (distance and addressing across US + Canada). Self-service freemium pricing means individual developers can evaluate and ship without engaging a sales team.

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

No images available

Pricing

£27 per 500 credits
Free Version
Free Trial

Pricing

$49/month
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

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Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Allies Computing
Founded: 1987
United Kingdom
postcoder.com

Company Information

Zip-Codes.com
Founded: 2003
United States
www.zip-codes.com

Alternatives

Alternatives

PAV API

PAV API

CDYNE
CDXStreamer

CDXStreamer

CDX Technologies

Categories

Categories

Address Verification Features

Address Validation
Autocomplete
Automatic Formatting
Data Cleansing
Data Discovery
Data Quality Control
Data Verification
Geographic Maps
Geolocation
Metadata Management
Reporting / Analytics
Search / Filter

Integrations

C#
CSS
Contact Form 7
Divi
Elementor
Formidable Forms
Forminator
Gravity Forms
Gutenberg Technology
HTML
JavaScript
Ninja Forms
Node.js
PHP
Python
WP Fluent Forms
Wix

Integrations

C#
CSS
Contact Form 7
Divi
Elementor
Formidable Forms
Forminator
Gravity Forms
Gutenberg Technology
HTML
JavaScript
Ninja Forms
Node.js
PHP
Python
WP Fluent Forms
Wix
Claim Postcoder and update features and information
Claim Postcoder and update features and information
Claim Zip-Codes.com and update features and information
Claim Zip-Codes.com and update features and information