Since superset, metabase and redash was mentioned, I'll share some development insights regarding these OSS projects. Note, I've never used these solutions before, so I can't speak to their quality, but I can speak to how active and invested they appear to be.
Looking at recently merged pull requests that were less than 120 days old, apache/superset had 89 unique authors, which is very high, as the following shows:
And redash has 11, but most of the contributions were more than 28 days ago, and is significantly less active than metabase and superset as the following shows:
I was actually quite surprised by superset, as I never heard of them before, but they are backed by serious investment (https://preset.io/about/), which clearly shows in how active their repository is.
They gave their SaaS subscribers a bunch of notice that it was being wound up, and some Redash Community members have picked up some of the load for hosting those customers.
Development of the main Redash repo though... has an uncertain future. There are people (Community members) improving things, and they seem to be getting shepherded/directly decently well by Jesse (was full time Redash employee).
So, things are ticking along. It might go really well and grow over time, or it might not. Not yet sure. Hopefully it does go well though. :)
Looking at recently merged pull requests that were less than 120 days old, apache/superset had 89 unique authors, which is very high, as the following shows:
https://oss.gitsense.com/insights/github?q=pull-age%3A%3C%3D...
Metabase had 37 authors, which is also quite high for an opensource project, which the following shows:
https://oss.gitsense.com/insights/github?q=pull-age%3A%3C%3D...
And redash has 11, but most of the contributions were more than 28 days ago, and is significantly less active than metabase and superset as the following shows:
https://oss.gitsense.com/insights/github?q=pull-age%3A%3C%3D...
I was actually quite surprised by superset, as I never heard of them before, but they are backed by serious investment (https://preset.io/about/), which clearly shows in how active their repository is.