Hi @Christopher, next week we’re open-sourcing our server and UI which will blur the lines a bit from today, but gives us a good opportunity to re-clarify. In a nutshell: paid features include managed infrastructure (including auth, scale / HA, and security layers) as well as team management and permissions. Additional protective measures like services that enforce SLAs, attempt to restart flows that have stopped for unusual reasons are available. Platform also includes features that require global coordination of state, like concurrency limits for task, and third party integrations like Slack notifications.