Snowflake uses it: https://www.snowflake.com/en/blog/how-foundationdb-powers-sn...
Tigris uses it: https://www.tigrisdata.com/blog/building-a-database-using-fo...
A good collection of papers, blog posts, talks, etc.: https://github.com/FoundationDB/awesome-foundationdb
https://discovery.hgdata.com/product/foundationdb
This "Who is hiring" post for Tesla mentions FoundationDB [0].
Firebolt [1] uses it.
FoundationDB is used at Datadog [2].
[0] https://news.ycombinator.com/item?id=26306170
[1] https://www.firebolt.io/blog/decomposing-firebolt-transactio...
[2] https://news.ycombinator.com/item?id=36576775
Snowflake article from 2018, I wonder if it's still true
The article is pretty vague, but nothing in it expired until at least 2023 :V
Yes. They hire engineers specifically to work on it.