1. Storage Differences: Confidant stores secrets in Amazon's Key Management Service (KMS), while Docker Secrets stores secrets directly within its swarm encrypted store.
2. Access Control: Confidant provides granular access controls to secrets through IAM policies, allowing fine-grained permission management, whereas Docker Secrets provides access control at the swarm level, restricting access to services within the same swarm.
3. Native Integration: Confidant seamlessly integrates with AWS services, leveraging its security features and scalability, while Docker Secrets is designed to work specifically within Docker Swarm, offering native integration with Docker containers.
4. Temporality: Docker Secrets can automatically rotate secrets, providing a built-in method for managing secret expiration and renewal, whereas Confidant may require additional scripting or tools for implementing secret rotation.
5. Scalability: Confidant can scale horizontally to handle large numbers of secrets and users efficiently due to its cloud-based architecture, while Docker Secrets may face scalability challenges when managing a vast number of secrets within a swarm.
6. Monitoring Capabilities: Docker Secrets lack built-in monitoring capabilities for secret usage and access, whereas Confidant offers logging and monitoring features that help track and audit secret interactions effectively.

In Summary, the key differences between Confidant and Docker Secrets lie in their storage mechanisms, access control, native integrations, temporality, scalability, and monitoring capabilities.