Simpler alternatives? Any PaaS like Heroku or Google App Engine or Cloud Foundry.
Or a serverless function platform like AWS lambda (not sure if it’s “simpler” but it is getting there)
Disclaimer I work for Pivotal who sells cloud foundry and a distro of Kubernetes
Bundle your code in a zip file. Describe it in a yaml template with the name, runtime, zip filename, memory needed, entry point in your code, and external HTTP path. Deploy it with "aws cloudformation package" and "aws cloudformation deploy".
The platform will give you load balancing, scaling, logging, metrics, internal and external endpoints, DNS, and CDN.
The PaaS platforms you mentioned are basically the same (you provide code + a bit of config and they do the rest), except priced by the hour.
It has a lot fewer features than Kubernetes, however it's also a lot simpler to get up and running with.