Docker Secrets vs Vault: What are the differences?
Developers describe Docker Secrets as "Manage any sensitive data which a container needs at runtime but you don’t want to store in the image or in source control". A container native solution that strengthens the Trusted Delivery component of container security by integrating secret distribution directly into the container platform. On the other hand, Vault is detailed as "Secure, store, and tightly control access to tokens, passwords, certificates, API keys, and other secrets in modern computing". Vault is a tool for securely accessing secrets. A secret is anything that you want to tightly control access to, such as API keys, passwords, certificates, and more. Vault provides a unified interface to any secret, while providing tight access control and recording a detailed audit log.
Docker Secrets and Vault can be primarily classified as "Secrets Management" tools.
Vault is an open source tool with 13.2K GitHub stars and 1.98K GitHub forks. Here's a link to Vault's open source repository on GitHub.