Loqate - The Standard in Global Address Verification
Smarty - Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
SAP Data Management - Sap Data Management is a flagship enterprise information management solution that facilities the organizations to manage data quality, migration of data, text analytics, and interconnectivity with both SAP and non-SAP system.
Addressy - Addressy is address verification software that captures and verifies addresses on websites.
AccuZIP - AccuZIP Postal Software and Data Cleansing For Direct Mail Marketing
ClickToAddress - ClickToAddress offers APIs for address lookup and verification.