Best Address Verification Software in the USA

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.

Convert good folks to good customers faster and build trust. Identity verification made simple. 13,000+ ID documents supported in 200+ countries and territories. Up to 50 AI-based Security Checks on each ID Document in seconds. Bank-Grade certified Biometrics Checks. Unparalleled Emerging Markets expertise. Dramatically accelerate customer conversion and bring down abandonment rates with IDWise’s fully automated, AI-driven, highly accurate and user-friendly identity verification solution. At IDWise we love to keep things simple. Everything from our simple all-in pricing plans to our seamless integration is tailored to help you serve your customers quickly and reliably with minimal friction, while focusing your precious resources at what you do best – running your business. We pride ourselves in our long-term partnership approach, recognizing that no two companies are the same when it comes to finding the right mix between speed, user experience, fraud prevention and compliance.