17 open-source BPM & Workflow vendors.

Open-source software for BPM & Workflow that you can self-host, with auditable source code — regardless of the developer's headquarters.

• ActivitiNon-EU vendor

  Open-source lightweight BPM and workflow engine for Java applications

  United Kingdom · owner in United States

• Apache AirflowSelf-hosted / open source

  The Apache Software Foundation standard for orchestrating batch-based data workflows and ETL processes via Python; no single controlling company.

  United States

• AutomatischSelf-hosted / open source

  German open-source workflow-automation alternative to Zapier.

  Germany

• BonitasoftEU sovereign

  French open-source BPM and low-code platform for process automation

  France · owner in Belgium

• CadenceSelf-hosted / open source

  Fault-tolerant, scalable workflow orchestration engine by Uber, now a CNCF Sandbox project; actively maintained and not superseded by the later fork Temporal.

  United States

• ConductorSelf-hosted / open source

  Open-source microservice orchestration engine, originally by Netflix, now maintained by Orkes (Cupertino, US) and the community; self-hostable with an optional Orkes Cloud.

  United States

• FlowableSelf-hosted / open source

  Swiss open-source BPM, CMMN and DMN platform for process automation

  Switzerland

• FlyteSelf-hosted / open source

  Cloud-native, open-source workflow orchestrator for machine learning and data engineering; a Linux Foundation AI & Data project with no single controlling company.

  United States

• Form.ioSelf-hosted / open source

  Open-source form and data management platform (Dallas, US) for complex, human input steps within enterprise workflows; self-hostable.

  United States

• Imixs-WorkflowEU sovereign

  German open-source workflow engine based on BPMN 2.0 for Java applications

  Germany

• jBPMSelf-hosted / open source

  Java-based open-source BPMN 2.0 workflow engine, part of the KIE Group, sponsored by Red Hat (US); fully self-hostable.

  United States

• JogetEU sovereign

  Open-source no-code/low-code platform combining BPM, workflow and app building

  Germany

• KestraSelf-hosted / open source

  Kestra is an open-source, event-driven orchestration platform for data, AI, and infrastructure workflows, built by Paris-headquartered Kestra Technologies (legally registered in La Madeleine, near Lille, France). Released under Apache 2.0, it lets teams declaratively define and run batch and event-driven workflows (YAML-based) with 1600+ plugins, and is used by large enterprises. The company raised a EUR 21M Series A in March 2026 to expand the orchestration platform. Actively maintained: v1.3.26 shipped June 30, 2026, with 27k+ GitHub stars and continuous commit activity.

  France

• PrefectSelf-hosted / open source

  Modern open-source alternative to Airflow by Prefect Technologies (US), with real-time data flows and low overhead; self-hostable with an optional Prefect Cloud.

  United States

• ProcessMakerNon-EU vendor

  Low-code BPM and workflow automation platform for enterprise processes

  United States

• Temporal.ioNon-EU vendor

  Open-source, durable workflow orchestration engine (Go/Java/Python/TypeScript) by Temporal Technologies (US); open-source core with a commercial Temporal Cloud SaaS.

  United States

• ToolJetSelf-hosted / open source

  Open-source low-code framework (San Francisco, US) for internal tools and approval workflows; self-hostable with an optional ToolJet Cloud.

  United States