Several open-source and commercial tools are available for automation. Building custom automation from scratch is feasible for organizations with a mature team to support the effort. Organizations must determine which tool(s) will meet their needs or if they need to develop automation functionality in-house.
Consider these rules of thumb to help determine the correct tool:
Find a tool that fits your existing operational processes well and is compatible with your technology stack (cloud providers, infrastructure software, preferred operating systems, etc.)
Focus on tools that are actively developed and have a large community of users
Avoid tooling sprawl by committing to one, or at most two, automation tools
Determine if you need technical support. Some open-source tools have commercial support options, as do virtually all commercial tools. Large or mature organizations may be able to support open-source tools internally.