1. Deployment Options: Duo Security offers both on-premises and cloud-based deployment options. It can be implemented as a standalone solution or integrated with existing applications and services. On the other hand, Okta is primarily a cloud-based identity and access management platform, offering less flexibility for on-premises deployments.
2. User Experience: Duo Security focuses on providing a seamless user experience with its simple and intuitive interface. It offers various authentication methods, including push notifications and biometrics, to enhance usability. Okta also emphasizes user experience but has a more comprehensive platform that may result in a slightly steeper learning curve for users.
3. Identity Management: Okta offers a centralized identity management system, providing a single source of truth for user identities across different applications and services. It allows for easy provisioning and deprovisioning of users, ensuring consistent access control. Duo Security, on the other hand, primarily focuses on two-factor authentication and access security, although it does offer limited identity management capabilities.
4. Integration Capabilities: As a leading identity and access management platform, Okta offers extensive integration capabilities with a wide range of applications and services. It provides pre-built connectors and APIs for easy integration. While Duo Security also supports integration with various applications, its integration capabilities may be relatively more limited compared to Okta.
5. Advanced Security Features: Duo Security provides various advanced security features, such as adaptive authentication and policy enforcement based on user behavior. It also offers secure single sign-on and contextual access policies. Okta also offers similar security features but has a broader range of security solutions, including threat intelligence and passwordless authentication.
6. Market Positioning: Okta is recognized as a leader in the identity and access management market, serving a wide range of industries and organizations of all sizes. It has a strong presence and customer base, with a comprehensive platform catering to diverse identity management needs. While Duo Security is also a popular choice for two-factor authentication, it may be more commonly used by specific industries or organizations with specific security requirements.

In summary, Duo Security primarily focuses on two-factor authentication and access security, offering deployment flexibility and a seamless user experience. On the other hand, Okta is a comprehensive cloud-based identity and access management platform with extensive integration capabilities, centralized identity management, and a broader range of advanced security features.