What are some alternatives?
When comparing twitter.github.io Kestrel and AWS Chatbot, you can also consider the following products
nginx - A high performance free open source web server powering busiest sites on the Internet.
Nanonets - Worlds best image recognition, object detection and OCR APIs. NanoNets’ platform makes it straightforward and fast to create highly accurate Deep Learning models.
CloudAMQP - CloudAMQP automates every part of setup, running and scaling of RabbitMQ clusters. Available on all major cloud and application platforms.
Spell - Deep Learning and AI accessible to everyone
RabbitMQ - RabbitMQ is an open source message broker software.
Nexosis - Easy way for developers to build machine learning apps