San Mateo, Calif.--E.piphany said Tuesday it would buy RightPoint Corp. for $393 million in stock. RightPoint's technology will enable E.piphany customers to track user sessions, analyze trouble spots in advertising campaigns and sales cycles, and personalize content. E.piphany will likely integrate the technology in its suite of applications designed to join marketing databases across a number of departments. IBM Corp., which has the integration services to join disparate databases, moved Monday to deliver similar tracking, analysis and personalization capabilities to its Net.Commerce Web site servers through partnerships with Web start-ups. E.piphany and RightPoint are both based in San Mateo, Calif.