In business, collaboration is key: from manufacturing contexts, where production depends on multiple industrial partners and involves complex supply chains, to political and social contexts, where government and non-profit organizations must coordinate on efforts in crisis management. In all contexts, collaboration requires interoperability — the ability of natively independent systems to work in concert effectively without fundamentally modifying their individual structure or behavior. One of many solutions LINAGORA offers is the open-source Petals Enterprise Service Bus (ESB), designed to link heterogeneous services via a workflow engine thereby providing service-level interoperability according to the SOA (Service Oriented Architecture) pattern.