serverless-step-functions

This plugin lets you define AWS Step Functions directly in your serverless.yml. Instead of going to the AWS console and clicking through the Step Functions designer, you write the state machine definition alongside your Lambda code and deploy it all together.

The plugin is free and open source. It doesn't have its own license file clearly posted, but it's a community plugin for the Serverless Framework ecosystem.

There's nothing to host. It's a Serverless Framework plugin: `npm install` it, add it to your config, and it deploys Step Functions state machines to AWS when you run `serverless deploy`. The ops burden is trivial because AWS manages the actual Step Functions infrastructure. Solo developers: if you're already on Serverless Framework and need Step Functions, this saves you from writing CloudFormation by hand. Small teams: same story: it keeps your workflow definitions in version control next to your functions. Beyond that: at scale, you might prefer CDK or Terraform for more control.

The catch: this is tightly coupled to the Serverless Framework. If you move to CDK, SAM, or SST for your infrastructure, this plugin doesn't come with you. Also, development has slowed; the last meaningful updates were a while back. It works, but don't expect rapid feature additions.