AddressBrain - 2026 Pricing, Features, Reviews & Alternatives

AddressBrain is a cloud-based REST API for UK address lookup, autocomplete, and validation, officially licensed via Royal Mail's Postcode Address File (PAF). Covering all UK postcodes and millions of delivery points, AddressBrain integrates into web forms, checkout flows, and back-office systems to reduce address entry errors, cut failed deliveries, and accelerate data capture. The API supports fuzzy search, postcode lookup, and address autocomplete, returning structured address components suitable for direct database ingestion. Deployment is fully cloud-hosted with no infrastructure overhead, and access is metered by lookup volume with tiered pricing plans suited to startups through enterprise-scale operations.

AddressBrain targets e-commerce platforms, logistics providers, financial services firms, and any business requiring high-accuracy UK address data at scale. The API returns standardised address fields including building name, street, locality, town, county, and postcode, with optional metadata such as UDPRN and UMPRN identifiers for precise property-level matching. Response payloads are lightweight JSON, compatible with any modern web or mobile stack. Rate limits, usage dashboards, and API key management are available through a self-service developer portal, giving technical teams full visibility into consumption and quota status.