You might be interested in Evidence, a SQL-based open source BI tool where all content is version-controllable. Disclaimer: I’m one of the maintainers. A lot of companies use Evidence for customer facing and embedded reporting.
https://github.com/evidence-dev/evidence
Previous HN discussions:
https://news.ycombinator.com/item?id=35645464 (97 comments)
https://news.ycombinator.com/item?id=28304781 (91 comments)