Prasad Kanchumarthi SNV. Building Connected Enterprises: A Comparative Framework for API, Ipaas, and Serverless Integration Using Webmethods, Apigee, Boomi, and AWS Lambda in Digital Transformation. IJETCSIT. 2026;7(3):32-37. doi:10.63282/3050-9246.IJETCSIT-V7I3P104