Best Open-source Workflow Orchestration Tools tools

Prefect

Pythonic workflow engine for resilient, observable data pipelines

Kestra

Event-Driven Declarative Orchestration Platform for Modern Workflows

Nextflow

Scalable, portable, reproducible pipelines powered by dataflow programming

Windmill

Self-hosted platform to turn scripts into internal apps

Dagu

Lightweight workflow engine with declarative YAML and Web UI

Apache Airflow

Programmatically author, schedule, and monitor workflows as code

Apache DolphinScheduler

Modern, low-code platform for high-performance data workflow orchestration

Dagster

Cloud-native orchestrator for developing and maintaining data assets

Inngest

Durable step functions that replace queues and scheduling

Mage OSS

Build modern data pipelines locally with visual, modular code

Conductor

Scalable orchestration engine for resilient microservice workflows

Maestro

Scalable workflow orchestrator powering Netflix’s data platform

Polaris

Lightweight Go workflow orchestrator for payments and fulfillment

SciPipe

Fast, flexible Go library for building robust scientific pipelines

Orchest

Visual, code‑first data pipelines without YAML or frameworks