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WSO2 ESB is a fast, lightweight, and versatile enterprise service bus, which supports a variety of enterprise integration patterns. WSO2 EI is an extended version of the ESB that includes support for all the other key products and technologies from the WSO2 Integration Platform. In other words, WSO2 EI is essentially an integrated packaging of the ESB, data integration technologies as well, such as data services, micro services, business processes, business rules, application server, and message brokering.
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