Orquesta is a workflow engine designed specifically to run natively in StackStorm. It has replaced the Mistral workflow engine, and the goal is to replace ActionChain in the future. Orquesta’s workflow definition is described in YAML and contains a number of changes and improvements over its predecessors. The workflow definition supports simple sequential workflows to complex workflows with forks, joins, and sophisticated data queries and transformation. Orquesta does not require a separate authentication system and database like Mistral did.