Best Address Verification Software for Python

Postcoder is a global address verification and customer data validation API used by over 10,000 organisations worldwide. Built by Allies Computing, Postcoder helps businesses capture clean, accurate customer data at the point of entry, reducing errors, cutting failed deliveries, and speeding up checkout and onboarding flows. Postcoder's address lookup API lets users find verified addresses instantly using postcode lookup or address autocomplete. Look up addresses based on a postcode, part of an address or a coordinate position. Postcoder provides access to Royal Mail PAF and Multiple Residence addresses, Ordnance Survey AddressBase property records and international addresses in 249 countries. Beyond address verification, Postcoder offers a full suite of contact data validation tools in a single API integration. Bank account validation checks sort codes and account numbers in real time, confirming validity, returning branch details, and verifying direct debit eligibility - useful for subscription businesses, lenders, and anyone collecting payment mandates. Email validation checks formatting, domain validity, and flags disposable or high-risk addresses to keep CRM data clean and improve deliverability. Mobile number validation checks whether a number is active and connected across 200+ countries, helping reduce wasted SMS spend and improve contact rates. For added security, Postcoder also offers OTP verification, delivering one-time passwords via SMS to protect customer accounts at sign-up, login, or checkout. Developers appreciate the comprehensive documentation and sample code, and a 30-day free trial means teams can get up and running in minutes without a credit card.

Transform good people into good customers faster and increase trust. It's easy to verify your identity. Supported in more than 200+ countries and territories, 13,000+ ID documents. Each ID Document can be subject to up to 50 AI-based security checks in just seconds. Bank-Grade Certified Biometrics Checks Unparalleled expertise in emerging markets. IDWise's AI-driven, fully automated, user-friendly identity verification solution will dramatically increase customer conversion rates and decrease abandonment rates. IDWise loves simplicity. Our seamless integration and simple pricing plans are designed to help you serve customers quickly and reliably while allowing you to focus your resources on what you do best, running your business. We take pride in our long-term partnership approach. We recognize that no two businesses are alike when it comes to finding the right balance between speed, user experience and compliance.