Metabase has a link to their repository in the first page of https://metabase.com/ Just based in this fact I would prefer Metabase.
How do they compare to generate high quality reports?
Agree metabase wins though: apt-get install openjdk-8-jre-headless && curl http://downloads.metabase.com/v0.26.1/metabase.jar && java -jar metabase.jar
Also I'm not sure where you bring the "but it doesn't receive bug fixes" statement from? We have a documented upgrade process [2] for the images you create using our documented setup guide.
[1] https://redash.io/help-onpremise/setup/setting-up-redash-ins... [2] https://redash.io/help-onpremise/maintenance/how-to-upgrade-...
Your front page says of the paid version: "Don't worry about installations, hosting and upgrades. All plans include a 30-day free trial. No credit card required."
My first impression was that it is hard to upgrade. Maybe not true, but it is what is communicated by the site.
If by reports you mean a daily email sent with a table and some graphs attached them both suck. The only tool that I know that excels on this is Reporting Services from Microsoft.
But they are really OK for dashboards and visualizations. Metabase has a pulse feature where you can schedule to send a visualization to email or slack, but not something very fancy.