AWS Step Functions lets you coordinate multiple AWS services into serverless workflows so
you can build and update apps quickly. AWS Step Functions lets you build visual workflows
that enable fast translation of business requirements into technical requirements
Amazon SWF helps developers build, run, and scale background jobs that have parallel or
sequential steps. SWF is not a visual workflow tool
Amazon Simple Notification Service (SNS) is a highly available, durable, secure, fully
managed pub/sub messaging service
Amazon Simple Email Service (Amazon SES) is a cloud-based email sending service designed to
help digital marketers and application developers send marketing, notification, and
transactional emails