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
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
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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