Do you have file-based workflows? Lots of events to handle? Amazon S3 Event Notifications might just fit the bill! Plus a bonus chat about S3 Security and object retention!
Amazon S3 Event Notifications: https://aws.amazon.com/s3/faqs/?nc=sn&loc=7
https://docs.aws.amazon.com/AmazonS3/latest/dev/NotificationHowTo.html
https://aws.amazon.com/blogs/aws/s3-event-notification/
https://aws.amazon.com/blogs/storage/amazon-s3-consistently-raises-the-bar-in-data-security/