Windmill Workflow and Internal Tool Platform

Windmill is an open-source workflow and internal-tool platform whose site lists San Francisco and Paris and a legal address in Dover, Delaware. Its investors listed on the site include Y Combinator, Gradient Ventures and Bessemer Venture Partners. It addresses the need to turn scripts into governed workflows, APIs and apps.

Scripts in 20+ languages become API endpoints and forms, and can be combined into DAG workflows with retries and approvals. The platform adds AI agents, data pipelines with DuckDB and dbt, and a low-code app builder. It can be self-hosted on Docker or Kubernetes, including on-premises, or used in Windmill cloud.

• Multi-language scripts: Supports 20+ languages, each exposed as an API endpoint and form.
• DAG workflows: Adds retries, approvals and parallel branches.
• AI agents: Works with 12 providers including self-hosted models.
• Data pipelines: Runs DuckDB, Python and dbt jobs.
• App builder: Builds low-code apps with React or Svelte frontends.
• Governance: Provides audit logs, OpenTelemetry traces, Git sync and rollback.

An operations team building approval workflows over existing Python scripts.

A fintech running scheduled reconciliation jobs with audit logs.

A data team exposing dbt pipelines as callable APIs for other departments.

Turns existing scripts into APIs, forms and workflows without a rewrite.

Self-hosting on Docker or Kubernetes keeps data in the customer's infrastructure.

Git sync, staged deploys and rollback support controlled releases.

The site lists SOC 2 Type II and 300+ Enterprise Edition customers.

Teams want to automate with code while keeping governance, which fuels open-source alternatives to proprietary low-code tools. Vietnamese engineering and operations teams building internal tools and data jobs can run it on their own servers to meet data-locality needs.

Site footer cites San Francisco and Paris; legal address in Dover, Delaware. Investors listed: Y Combinator, Gradient Ventures and Bessemer Venture Partners. SOC 2 Type II listed; 10,153 instances reported by the company.