What are some alternatives?
When comparing twitter.github.io Kestrel and Amazon Machine Learning, you can also consider the following products
RabbitMQ - RabbitMQ is an open source message broker software.
Machine Learning Weekly - A hand-picked newsletter in machine learning & deep learning
CloudAMQP - CloudAMQP automates every part of setup, running and scaling of RabbitMQ clusters. Available on all major cloud and application platforms.
Apple Machine Learning Journal - A blog written by Apple engineers
Amazon SQS - Amazon Simple Queue Service is a fully managed message queuing service.
Spell - Deep Learning and AI accessible to everyone