Conductor

Conductor is an open-source workflow engine for orchestrating microservices, AI agents, and durable workflows. It persists every step, supports retries, timeouts, dynamic forks, loops, sub-workflows, versioning, replay, and recovery from failures. Workers can be written in Java, Python, Go, JavaScript, C#, Ruby, or Rust, while workflows use a declarative JSON model.

The product includes a built-in visual UI for designing, running, observing, and debugging workflows, with task input, output, timing, and retry history inspection. It also documents native support for 14+ LLM providers, MCP and function calling, human approvals, vector databases for RAG, and runtime-generated workflow definitions.

Conductor can run locally through its CLI, Docker, or a JVM-based server. It is licensed under Apache 2.0 and supports self-hosted deployments with multiple persistence backends and message-brok不