Enterprise integration apps can be correlated to parts of the brain when APIs are the backbone of an enterprise. These apps orchestrate the application interaction to build a seamless digital transformation experience. For an enterprise to stand out of the competition it has to undergo the digital transformation connecting applications, customers, and partners at a rapid pace with agility. Hence it is a crucial decision for an enterprise to pick the right API application development ecosystem to excel. Massil Technologies are the true face of the opensource ecosystem. We recommend WSO2 Enterprise Integrator for building integration apps for its rapid application development capability, deployment architecture (on-premise, cloud or hybrid), operating system & cloud-agnostic, and opensource.