Activiti is a lightweight, Java-centric workflow and business process management engine built around the BPMN 2 standard. Developers embed it in Java applications, with Spring integration, to model, run and monitor business processes. Activiti Cloud adds cloud-native building blocks for distributed systems, aimed at containerised deployments on Docker and Kubernetes. Activiti is an engine that you run yourself; it is not a hosted service.
The project is open source under the Apache License 2.0. It started in 2010 with sponsorship from Alfresco, whose commercial Process Services product is based on it, and the Activiti website carries Alfresco Software branding. Hyland, a company based in Ohio, acquired Alfresco in 2020. Because you operate Activiti on your own infrastructure, you decide where data is stored. European organisations should still weigh the US ownership of the sponsor and check how actively the project is maintained before relying on it.