1. Licensing Model: BeyondTrust follows a concurrent licensing model, where the number of users accessing at one time determines the licensing cost, while TeamViewer offers a per-device licensing model.

2. Primary Functionality: BeyondTrust primarily focuses on privilege access management, allowing organizations to control who has access to what resources, while TeamViewer is mainly used for remote desktop access and support solutions.

3. Security Features: BeyondTrust provides advanced security features such as session monitoring, recording, and access control, whereas TeamViewer offers encryption and two-factor authentication but lacks detailed session auditing capabilities.

4. Deployment Options: BeyondTrust offers on-premise, cloud-based, and hybrid deployment options, providing flexibility to choose based on organizational needs, while TeamViewer mainly offers cloud-based solutions with limited on-premise deployment options.

5. Supported Platforms: BeyondTrust supports a wide range of operating systems including Windows, macOS, and Linux, making it versatile for various environments, whereas TeamViewer focuses mainly on Windows and macOS, with limited support for Linux and mobile platforms.

6. Customization and Integration: BeyondTrust allows extensive customization and integration with third-party tools and platforms, offering more flexibility for organizations, while TeamViewer has limited customization options and integrations.

In Summary, BeyondTrust and TeamViewer differ in licensing models, primary functionalities, security features, deployment options, supported platforms, and customization capabilities in their respective solutions.