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20 Most Popular Open-Source Automation & Workflow Tools

The most-starred open-source automation, orchestration and workflow engines — no-code builders, job schedulers, GitOps and CI/CD — with GitHub links and star counts.

By The DevFixPro Editorial Team · independent editorial research project

Star counts retrieved from the GitHub API on 2026-08-17. Open-source projects grow daily, so treat the numbers as a snapshot — always check the linked repository for the latest figures, license, and activity.

Automation saves the most time of any engineering investment. The 20 open-source automation and workflow tools below are ranked by GitHub stars (fetched 2026-08-17) — from visual no-code builders to durable execution engines and GitOps controllers. Each links to its repository.

Lean toward a no-code builder (n8n, Activepieces) for quick wins, a code-first orchestrator (Temporal, Prefect, Dagster) for reliability, and GitOps (Flux, Argo) for Kubernetes delivery.

  1. 1n8n on GitHub
    n8n★ 200,941
    By n8n

    Extensible workflow automation tool with 400+ integrations.

    View on GitHub →
  2. 2Trigger.dev on GitHub
    Trigger.dev★ 16,044
    By Trigger.dev

    Background jobs and AI workflows in TypeScript.

    View on GitHub →
  3. 3Temporal on GitHub
    Temporal★ 22,359
    By Temporal Technologies

    Durable execution platform for long-running workflows.

    View on GitHub →
  4. 4Prefect on GitHub
    Prefect★ 23,631
    By Prefect

    Workflow orchestration for Python data pipelines.

    View on GitHub →
  5. 5Dagster on GitHub
    Dagster★ 16,005
    By Dagster Labs

    Data-aware orchestration platform for the modern stack.

    View on GitHub →
  6. 6Kestra on GitHub
    Kestra★ 27,836
    By Kestra

    Event-driven, language-agnostic orchestration and scheduling.

    View on GitHub →
  7. 7Windmill on GitHub
    Windmill★ 17,563
    By Windmill Labs

    Open-source developer platform for internal tooling and automation.

    View on GitHub →
  8. 8Automatisch on GitHub
    Automatisch★ 13,932
    By Automatisch Team

    Open-source Zapier alternative for workflow automation.

    View on GitHub →
  9. 9Activepieces on GitHub
    Activepieces★ 23,840
    By Activepieces

    No-code, AI-ready business automation (Zapier alternative).

    View on GitHub →
  10. 10Huginn on GitHub
    Huginn★ 49,801
    By Huginn Community

    Build agents that monitor and act on the web for you.

    View on GitHub →
  11. 11Node-RED on GitHub
    Node-RED★ 23,539
    By OpenJS Foundation

    Flow-based programming for wiring together hardware and APIs.

    View on GitHub →
  12. 12StackStorm on GitHub
    StackStorm★ 6,519
    By StackStorm

    Event-driven automation and remediation (IFTTT for ops).

    View on GitHub →
  13. 13Apache Camel on GitHub
    Apache Camel★ 6,289
    By Apache Software Foundation

    Integration framework with enterprise pattern implementations.

    View on GitHub →
  14. 14Camunda on GitHub
    Camunda★ 4,251
    By Camunda

    Workflow and decision automation platform (BPMN/DMN).

    View on GitHub →
  15. 15GoCD on GitHub
    GoCD★ 7,423
    By GoCD Team

    Continuous delivery server with value-stream modeling.

    View on GitHub →
  16. 16Argo Workflows on GitHub
    Argo Workflows★ 16,904
    By Argoproj

    Container-native workflow engine for Kubernetes.

    View on GitHub →
  17. 17Rundeck on GitHub
    Rundeck★ 6,269
    By PagerDuty / Rundeck

    Runbook automation and job scheduling for ops.

    View on GitHub →
  18. 18Drone on GitHub
    Drone★ 37,987
    By Harness

    Container-native continuous integration pipeline engine.

    View on GitHub →
  19. 19Woodpecker on GitHub
    Woodpecker★ 7,706
    By Woodpecker CI

    Simple, cloud-native continuous integration engine.

    View on GitHub →
  20. 20Flux on GitHub
    Flux★ 8,338
    By CNCF / Flux

    GitOps toolkit for Kubernetes continuous delivery.

    View on GitHub →

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