Sshsync is a command-line interface tool designed for executing shell commands across multiple remote servers. Created in Go, it addresses limitations found in other libraries by implementing async SSH agent authentication. This allows for high scalability, accommodating environments with numerous servers ({~3000}). A key advantage of Sshsync is its ability to manage SSH agent concurrency, optimizing performance during extensive operations. User feedback suggests potential improvements in user experience, particularly in documentation and user interaction scenarios, such as handling sudo passwords. Comparing Sshsync to Ansible, users have noted it serves a similar purpose but emphasizes simplicity.