Disclosed are methods, systems, and non-transitory computer-readable medium for optimizing user experience with respect to email journeys. For example, a method may include determining a first development subset, a first quality assurance subset, and a first production subset of a first plurality of user identifiers; determining and transmitting a first development set of messages, a first quality assurance set of messages, and a first production set of message; determining a development performance indicator, a quality assurance performance indicator, and a production performance indicator based on one or more messages received in response to the transmitted first development set of messages, first quality assurance set of messages, and first production set of message, respectively.