Check out https://github.com/metabase/metabase https://github.com/metabase/metabase . I'm not clear on their open source vs paid model, but I'm pretty sure you

Check out https://github.com/metabase/metabase https://github.com/metabase/metabase . I'm not clear on their open source vs paid model, but I'm pretty sure you can host it yourself and their core is open source.