Tech companies manage user data privacy by implementing various strategies and technologies to protect personal information. This includes employing encryption to secure data both in transit and at rest, along with strict access controls to limit who can view sensitive information. Compliance with data protection regulations such as GDPR is critical, as companies must ensure transparent data collection practices and users' rights to access or delete their information. Regular audits, security training for employees, and the adoption of privacy-by-design principles further contribute to safeguarding user data from breaches and misuse.