Automation & Workflows

Activepieces is an open source no-code automation platform. 300+ integrations, visual flow builder, TypeScript pieces, self-hostable, the modern open source Zapier/Make alternative.

Apache Airflow is the original open source workflow orchestrator. Python-defined DAGs, rich UI, 1000+ providers, scalable execution, used by Airbnb, Google, Amazon, and every data team.

Apache Hop is an open source data orchestration tool. Visual pipeline designer, multi-engine (Spark, Flink, Google Dataflow), metadata injection, Hop GUI for developers. The Pentaho successor.

Argo Workflows is a Kubernetes-native workflow engine. Define workflows as Kubernetes CRDs, each step is a container. CNCF project, used by Intuit, Adobe, NVIDIA, and every K8s data team.

Cal.com is the open source Calendly. Scheduling links, calendar sync (Google, Outlook, iCloud), video conferencing (Zoom, Google Meet, Daily), payments via Stripe, team scheduling, round-robin, and 100+ integrations. Self-hostable in Docker.

Kestra is a declarative open source workflow orchestration platform. YAML-defined workflows, 100+ plugins, scalable execution, beautiful UI, event-driven triggers. The Airflow alternative with better UX.

n8n is a workflow automation tool that combines visual flow-building with the ability to write custom JavaScript/Python at any node. 400+ integrations, AI workflows, self-hostable. Used by 70K+ teams including Vodafone, Fiverr, and Delivery Hero.

Temporal is an open source workflow orchestration platform. Durable execution (your workflow survives crashes), automatic retries, timeouts, signals, queries, and polyglot (Go, Java, TypeScript, Python, .NET).

Windmill is an open source developer platform. Turn any script (Python, TypeScript, Go, Bash, SQL) into a workflow, schedule, API endpoint, or UI. The Retool + Airplane alternative.