Ready to improve your customer onboarding?
Postcoder is trusted by fintech companies, debt managers, and financial services providers across the UK and beyond. Start your free 30-day trial today and see the difference verified data makes.
Verify customers faster and stay a step ahead
Postcoder gives fintech companies the data verification tools they need to onboard customers quickly, accurately and securely.
The hero includes a visual product demo...
Poor data quality is a risk, not just an inconvenience
In financial services, bad data has consequences beyond failed deliveries or undelivered emails. Inaccurate customer records slow down KYC and AML checks and increase the friction that drives customers to abandon onboarding entirely.
Fintechs face a particular challenge: they need to move fast to compete with traditional banks on user experience, while meeting increasingly stringent regulatory requirements around identity verification and customer data accuracy. Getting both right – at scale – requires the right infrastructure.
93%of businesses say the quality of contact data has become more important in the last 12 months, with customer identification and verification being a critical factor.Experian 2022 Global Data Management Report
How does Postcoder help fintechs succeed?
What is Postcoder?
Postcoder is a multi-feature API you can integrate into your website or app quickly and easily using pre-built integrations, sample code and API reference, all within clear and well-structured docs. You can be up and running in minutes with a free trial, and Postcoder's support specialists are always on hand if you need help.
The ultimate toolkit for fintech
Everything you need to verify customer data at onboarding and beyond:
Address lookup
Postcode lookup, Eircode lookup, and address validation for 249 countries worldwide. Essential for identity verification and regulatory compliance.
Bank validation
Real-time sort code and account number verification, including branch details, BIC codes, and direct debit eligibility.
Mobile validation
Confirm mobile numbers are valid and live on a network — supporting international number formats and HLR lookup.
Email validation
Verify email addresses are real, correctly formatted, and not disposable — protecting your communication and fraud detection workflows.
Rooftop geocoding
Latitude and longitude coordinates at rooftop precision. Essential for accurate delivery, store finders and location-based services.
OTP verification
Send and validate one-time passwords via SMS to support two-factor authentication and secure account actions.
What our fintech customers say
"Postcoder is a single API that provides all the features we need… Rather than integrate several APIs, we only had to integrate one."
Carl Horn Head of Digital Servicing & Customer Transformation / Capquest
"Postcoder offers a seamless integration with our services. It is very popular with our customers."
James Gutterson Commercial Manager / Signicat
"I greatly value the high quality of address lookups, which ensures top-tier results from credit checks and eliminates manual searches for our customers. This leads to high customer satisfaction and conversion rates, sometimes exceeding 80% in lending journeys."
Jim.F. / G2 review
Award-winning API with top performance, easy admin and great support
Businesses rate Postcoder 4.7 stars out of 5 on the world's most trusted software marketplace.
