yesbee spelled homophone to ESB. As what it spelled,
yesbee is an ESB platform based on node.js stack.
yesbee is a lightweight ESB.
yesbee as library
mkdir my-app cd my-app npm init npm install yesbee --save
Components handle each particular integration function. component act as factory of endpoints.
Service wrap up single domain of business process as one. You may think service as single integration business model.