In the context of cloud-native app development, vendor lock-in refers to the challenges organizations face when they become overly dependent on a single cloud service provider, leading to potential issues such as price hikes, service degradation, limited innovation, and single points of failure. To mitigate these risks, companies are encouraged to maintain application portability by avoiding proprietary data formats, using open-source technologies like MySQL, PostgreSQL, MongoDB, and adhering to standards such as OpenAPI for API documentation. Infrastructure alternatives like on-premises, private cloud, multi-cloud, and hybrid cloud architectures offer varying degrees of control, flexibility, and risk management, enabling organizations to select the best options for their specific needs. By leveraging open source tools and modern standards, businesses can avoid becoming overly reliant on a single provider, thus maintaining their ability to innovate and adapt to changing technological landscapes.