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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 Firstlogic?

To ensure the precision and dependability of your address information, it's essential to cross-check it against official Postal Authority databases. Doing so will not only boost delivery success rates and minimize returned mail but also enable you to take full advantage of postal discounts. By integrating address data sources with our advanced cleansing transformations, you can effectively prepare your address data for both validation and verification purposes. This process involves breaking down individual components within your address records into separate elements. Moreover, addressing common typographical mistakes and formatting your data to meet industry standards will greatly improve mail delivery results. It is also important to verify the authenticity of addresses by consulting the official USPS address database, allowing you to ascertain whether they are residential or commercial and confirming their deliverability using USPS Delivery Point Validation (DPV). Once the data has been validated, you can easily merge it back into various disparate data sources or create custom output files that fit your organization's operational workflows. This thorough approach not only enhances the integrity of your address data but also optimizes your mailing operations, resulting in more efficient processes. In the end, a well-organized address management strategy can lead to significant cost savings and improved customer satisfaction.

Media

Media

Integrations Supported

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 Supported

API Availability

Has API

API Availability

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

Pricing not provided

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard 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

Firstlogic

Company Location

United States

Company Website

firstlogic.com/products/data-quality-suite

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

Not specified

Data Matching

Not specified

Data Quality

Not specified

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