You can share builds with users who do not have an account associated with your project. Cloud BuildA continuous integration service for Unity projects that automates the process of creating builds on Unity’s servers. More info
See in Glossary can generate links automatically and send them via email or application integration, for example, with Slack. You can also generate links manually from the dropdown menu of a given build.
Share links expire after two weeks. You can adjust this in the share link menu of the build that you want to share.