The Basic (free) plan includes Kibana Alerting. For reporting, you'll need to apply for a Gold license. Or you can give it a try to our Elastic Cloud so you'll save costs on self-hosting the solution.
Regarding alternative plugins, I'm personally not aware of any but maybe the community can help you out.
Apache, Apache Lucene, Apache Hadoop, Hadoop, HDFS and the yellow elephant
logo are trademarks of the
Apache Software Foundation
in the United States and/or other countries.