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What is Postcoder?

Postcoder – Customer Data Verification Made Simple. Trusted by NHS, Sky, KFC, Rightmove, and over 10,000 organisations globally, Postcoder is the all-in-one API platform from Allies Computing that helps businesses collect accurate, verified customer data from the very first interaction. Rated 4.6 stars on G2 and the winner of multiple industry awards, it's the toolkit that keeps forms fast, data clean, and customer journeys completely friction-free. Postcoder's address lookup lets customers find their address in seconds — whether they type a postcode, begin entering a street name, or search by geographic coordinates. The service draws on Royal Mail PAF, Multiple Residence data, Ordnance Survey AddressBase, and international address databases spanning 249 countries, delivering consistently high match rates both in the UK and overseas. Beyond addresses, Postcoder packages a full suite of contact data tools into a single API integration: - Bank account validation: Confirm sort code and account number combinations in real time, retrieve branch-level details, and establish direct debit eligibility before a payment mandate is submitted. - Email validation: Go beyond syntax checks to assess domain health, detect disposable addresses, and score deliverability risk, keeping CRM lists and transactional inboxes reliable. - Mobile number validation: Confirm whether a mobile is live and reachable across more than 200 countries, cutting wasted spend on undeliverable SMS communications. - OTP verification: Add an SMS-based one-time password layer to sign-up, login, or checkout flows to protect accounts and verify identity at the point of entry. Rather than managing multiple vendors, businesses get one integration, one dashboard, and one support team. Getting started takes minutes — a free trial is available with no payment details required, and the documentation includes ready-to-use sample code across popular languages.

What is Ideal Postcodes?

We provide businesses with tools to efficiently verify and locate precise UK addresses and postcodes. Utilizing rooftop-level geolocation data and Unique Property Reference Numbers (UPRN), we guarantee the accuracy of our information. Our services are fully compliant with GDPR regulations, and we offer comprehensive documentation and support to facilitate seamless integration. We serve companies of various sizes, delivering speedy and affordable APIs for postcode lookups, address searches, and autocomplete functions. Integrating our solutions into your website or platform requires only minimal coding, making it accessible for all users. Additionally, our commitment to customer satisfaction ensures ongoing support as you implement our tools.

Media

Media

Integrations Supported

CSS
Divi
Elementor
Formidable Forms
Forminator
Gravity Forms
Gutenberg Technology
Node.js
PHP
Python
WP Fluent Forms

Integrations Supported

BigCommerce
FormAssembly
HubSpot CRM
Magento
Odoo
OpenCart
SuiteMaster
WooCommerce
Zoho CRM

API Availability

Has API

API Availability

Has API

Pricing Information

£27 per 500 credits
Start with a free trial, then pay-as-you-go or pay monthly. Credit packs start at £27, and monthly plans start at £45. Volume discounts and charity/public sector pricing available.
Free Trial Offered?

Pricing Information

£9 for 200 address lookups
Free Version
Free Trial Offered?

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Online Training

Training Options

Documentation Hub
Online Training

Company Facts

Organization Name

Allies Computing

Date Founded

1987

Company Location

United Kingdom

Company Website

postcoder.com

Company Facts

Organization Name

Ideal Postcodes

Company Location

United Kingdom

Company Website

ideal-postcodes.co.uk

Categories and Features

Address Verification

Address Validation
Autocomplete
Automatic Formatting
Data Cleansing
Data Verification
Geolocation
Metadata Management
Reporting / Analytics
Search / Filter

Categories and Features

Address Verification

Address Validation
Autocomplete
Automatic Formatting
Data Cleansing
Geolocation
Search / Filter

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