AWS Step Functions vs Conductor

AWS Step Functions is a cloud workflow service for coordinating AWS services and HTTPS endpoints, including SaaS applications. Workflows are state machines written in Amazon States Language, with Workflow Studio providing a visual designer. Definitions can branch, run steps in parallel, set timeouts, retry failures, and handle errors with try/catch or rollback patterns. Service integrations connect to over 200 AWS services, while AWS SDK integrations can invoke over 9,000 API actions. HTTPS endpoint integration connects directly to HTTP-based services. Distributed Map can process large datasets, including Amazon S3 data, with up to 10,000 parallel child executions in one Map Run. Execution history, CloudWatch Logs, and AWS X-Ray support review and tracing. Standard executions can run for up to one year; Express executions can run for up to five minutes. Task, state, or execution input and output is limited to 256 KiB. A Free Tier plan is listed at free indefinitely; Standard and Express plans bill usage.

Conductor is an Apache 2.0 open-source platform for building and orchestrating AI agents and workflows on a durable execution engine. It persists workflow and task state, allowing recovery after worker or infrastructure failure, with retries, timeouts, pause, resume, and termination controls. Workflows can use nested loops, dynamic branches, sub-workflows, and thousands of tasks. Native AI features include LLM tasks, MCP tool discovery and calls, human approval steps, and vector workflows for retrieval-augmented generation. Agents from LangGraph, CrewAI, Google ADK, and the OpenAI SDK can be used. SDKs are listed for Java, Python, TypeScript, .NET, Go, Ruby, and Rust. Conductor documents event-driven and Agent2Agent integrations. It can run anywhere Docker runs, using Redis by default and Elasticsearch for indexing, with replaceable storage and queue backends. Plans include free self-hosted OSS and hosted Developer Edition options.